{"id":49855,"date":"2026-06-05T08:40:31","date_gmt":"2026-06-05T12:40:31","guid":{"rendered":"https:\/\/www.iff.com\/?p=49855"},"modified":"2026-09-25T14:53:16","modified_gmt":"2026-09-25T18:53:16","slug":"optimizing-phytase-animal-feed","status":"publish","type":"post","link":"https:\/\/www.iff.com\/es\/media\/stories\/optimizing-phytase-animal-feed\/","title":{"rendered":"Optimizing Phytase in Animal Feed: Performance Starts With Knowing Your Limestone"},"content":{"rendered":"<div class=\"m-block brand-color4 widget-left l-essential-takeaways\"  >\n   <div>\n\t    \t        <div class=\"et-title\">Essential Takeaways<\/div>\n\t    \t    \t        <ul>\n<li>Limestone is a primary calcium source in animal feed, but its solubility and composition vary widely \u2014 affecting how phytase performs.<\/li>\n<li>Global research shows significant differences in limestone particle size, calcium content and solubility, even within the same classification.<\/li>\n<li>Axtra\u00ae PHY GOLD matrix values are tailored to limestone solubility, supporting more accurate and consistent formulation outcomes.<\/li>\n<li>IFF&#8217;s Limestone Analysis Service gives nutritionists the ingredient data needed to optimize phytase dosing and feed efficiency.<\/li>\n<\/ul>\n\t       <\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Phytase in animal feed plays a critical role in unlocking nutrients and improving feed efficiency. But real-world results&nbsp;aren\u2019t&nbsp;always consistent.&nbsp;Even when formulations look similar on paper,&nbsp;ingredient variability, especially from mineral sources, can strongly&nbsp;infuence&nbsp;performance.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One often-overlooked factor? Limestone.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When you use&nbsp;<a href=\"https:\/\/www.iff.com\/animal-nutrition\/products\/axtra-phy-gold\/\" target=\"_blank\" rel=\"noreferrer noopener\">Axtra\u00ae PHY GOLD phytase<\/a>,&nbsp;you\u2019re&nbsp;already taking a step toward improving nutrient&nbsp;utilization&nbsp;and feed efficiency.&nbsp;An enabler to achieve this is&nbsp;the quality of the limestone used in animal feed.&nbsp;Understanding limestone&nbsp;quality and solubility is essential to unlocking the full potential of&nbsp;phytase.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As a primary calcium source, limestone does more than&nbsp;contribute&nbsp;nutrients. It influences how those nutrients behave during digestion. Variability in limestone solubility and composition can directly affect how phytase performs, particularly in the upper digestive tract where early enzyme activity is most important.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That\u2019s&nbsp;why understanding your limestone&nbsp;isn\u2019t&nbsp;just a&nbsp;formulation&nbsp;detail.&nbsp;It\u2019s&nbsp;a practical step toward more predictable performance. This is where IFF\u2019s&nbsp;<a href=\"https:\/\/www.iff.com\/animal-nutrition\/services\/\" target=\"_blank\" rel=\"noreferrer noopener\">limestone analysis service<\/a>&nbsp;can help you better characterize your&nbsp;limestone&nbsp;and support more consistent, data-driven formulation decisions.&nbsp;&nbsp;<\/p>\n\n\n<div class=\"m-block blog-cta\"  >\n            <div class=\"blog-cta__content\">\n                                        <div class=\"blog-cta__title\">\n                    Learn more about Axtra\u00ae PHY GOLD phytase                <\/div>\n                    <\/div>\n                <a href=\"https:\/\/www.iff.com\/animal-nutrition\/products\/axtra-phy-gold\/\" target=\"_blank\" class=\"c-btn -normal -primary has-icon icon-right\">Explore <svg width=\"30\" height=\"30\" class=\"icon icon-lib-icon-arrow1 \" aria-hidden=\"true\" role=\"img\"><use xlink:href=\"#lib-icon-arrow1\"><\/use><\/svg><\/a>    <\/div>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/optimizing-phytase-animal-feed\/#Why_Phytase_in_Animal_Feed_Effectiveness_Relies_on_Limestone\" >Why&nbsp;Phytase in Animal Feed Effectiveness Relies on Limestone<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/optimizing-phytase-animal-feed\/#Global_Research_Shows_Wide_Variation_in_Limestone_Calcium_Content\" >Global Research Shows Wide Variation in Limestone Calcium Content<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/optimizing-phytase-animal-feed\/#Why_Limestone_Variability_Matters_for_Axtra%C2%AE_PHY_GOLD\" >Why Limestone Variability Matters for Axtra\u00ae PHY GOLD<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/optimizing-phytase-animal-feed\/#Turning_Limestone_Data_Into_Practical_Formulation_Insight\" >Turning Limestone Data Into Practical Formulation Insight<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/optimizing-phytase-animal-feed\/#Limestone_Knowledge_as_a_Foundation_for_Feed_Performance\" >Limestone Knowledge as a Foundation for Feed Performance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/optimizing-phytase-animal-feed\/#Understanding_Limestone\" >Understanding Limestone<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/optimizing-phytase-animal-feed\/#Common_Questions_About_Phytase_in_Animal_Feed\" >Common Questions About\u00a0Phytase\u00a0in Animal Feed<\/a><\/li><\/ul><\/nav><\/div>\n<h2 id=\"h-why-nbsp-phytase-in-animal-feed-effectiveness-relies-on-limestone\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Phytase_in_Animal_Feed_Effectiveness_Relies_on_Limestone\"><\/span><strong>Why&nbsp;Phytase in Animal Feed Effectiveness Relies on Limestone<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Limestone is&nbsp;the primary&nbsp;source of calcium used in animal feeds,&nbsp;mainly&nbsp;due to&nbsp;its&nbsp;high calcium content and low cost.&nbsp;It&nbsp;is vital for bone development, metabolic functions, and overall&nbsp;animal performance.&nbsp;But not all limestone behaves the same once it enters the animal\u2019s digestive system\u2014and that difference can have a real impact on how well nutrients are absorbed&nbsp;and how effectively&nbsp;Axtra\u00ae PHY GOLD phytase&nbsp;performs&nbsp;in animal feed.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Beyond calcium concentration alone, the critical differentiator is solubility:&nbsp;how quickly calcium is released during digestion.&nbsp;Some limestones dissolve very quickly, while others release calcium more gradually.&nbsp;When calcium is released too early or too late, it can interfere with phosphorus availability and reduce the effectiveness of phytase enzymes like&nbsp;Axtra\u00ae PHY GOLD. Even a high-quality&nbsp;phytase&nbsp;may not&nbsp;perform at its best if the limestone&nbsp;isn\u2019t&nbsp;well matched to the formulation.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This variability is often underestimated, but it can have a measurable impact on nutrient availability and&nbsp;overall&nbsp;formulation outcomes.&nbsp;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"891\" height=\"626\" src=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/06\/Effect-of-limestone.png\" alt=\"Chart showing effect of limestone source on ilial phosphorus digestibility for two phytase enzymes\" class=\"wp-image-49857\" srcset=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/06\/Effect-of-limestone.png 891w, https:\/\/www.iff.com\/wp-content\/uploads\/2026\/06\/Effect-of-limestone-300x211.png 300w, https:\/\/www.iff.com\/wp-content\/uploads\/2026\/06\/Effect-of-limestone-768x540.png 768w, https:\/\/www.iff.com\/wp-content\/uploads\/2026\/06\/Effect-of-limestone-400x281.png 400w, https:\/\/www.iff.com\/wp-content\/uploads\/2026\/06\/Effect-of-limestone-200x141.png 200w\" sizes=\"auto, (max-width: 891px) 100vw, 891px\" \/><figcaption class=\"wp-element-caption\">Effect of limestone source on ileal phosphorus digestibility<\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 id=\"h-global-research-shows-wide-variation-in-limestone-calcium-content\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Global_Research_Shows_Wide_Variation_in_Limestone_Calcium_Content\"><\/span><strong>Global Research Shows Wide Variation in Limestone Calcium Content<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Large-scale research confirms that limestone variability is substantial. A global study that evaluated 641 limestone samples from 40 countries showed wide differences in limestone composition and behavior:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Calcium content:<\/strong> Many samples deviated from the commonly assumed calcium content given in feed composition[AP2]&nbsp; tables, affecting formulation accuracy<\/li>\n\n\n\n<li><strong>Particle size:<\/strong> With limestones classed as \u201c\u2018fine\u201d ranging from ~40 to ~990&nbsp;\u00b5m and those classed as \u2018coarse\u2019 ranging from ~300 to ~3000 \u00b5m<\/li>\n\n\n\n<li><strong>Solubility:<\/strong> Among \u201cfine\u201d limestones, particle size explained only 52% of the differences in solubility, and for \u201ccoarse\u201d limestones, there was no meaningful correlation at all.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These findings&nbsp;demonstrate&nbsp;that limestone sources differ widely in both composition and behavior, even when they appear similar.&nbsp;Relying on broad limestone classifications can lead to inaccuracies in nutrient availability, underscoring the need for precise, data-driven limestone characterization.&nbsp;Similar challenges are discussed in broader work on the <a href=\"https:\/\/www.poultryworld.net\/health-nutrition\/nutrition\/practical-application-of-matrix-values-for-enzymes\/\" target=\"_blank\" rel=\"noreferrer noopener\">practical application of enzyme matrix values<\/a> across feeds with varying ingredient characteristics.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>&nbsp;<\/td><td>Fine (GMD&lt;1000&nbsp;\u00b5m)&nbsp;<\/td><td>Coarse &gt;1000&nbsp;\u00b5m&nbsp;<\/td><\/tr><tr><td>No of samples&nbsp;&nbsp;<\/td><td>566&nbsp;<\/td><td>75&nbsp;<\/td><\/tr><tr><td>GMD range&nbsp;<\/td><td>38&nbsp;\u00b5m&nbsp;\u2013&nbsp;992&nbsp;\u00b5m&nbsp;<\/td><td>302&nbsp;\u00b5m&nbsp;\u2013&nbsp;3068&nbsp;\u00b5m&nbsp;<\/td><\/tr><tr><td>Calcium&nbsp;content range&nbsp;<\/td><td>33.3%&nbsp;\u2013 39.7%&nbsp;<\/td><td>34.7%&nbsp;\u2013&nbsp;40%&nbsp;<\/td><\/tr><tr><td>Mean solubility&nbsp;&nbsp;<\/td><td>18.8%&nbsp;\u2013 99.4% at 5 mins&nbsp;<\/td><td>23.2%&nbsp;\u2013 96% at 30 mins&nbsp;&nbsp;<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\"><em>Summary of findings from the global limestone survey<\/em><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-left\" id=\"h-why-limestone-variability-matters-for-axtra-phy-gold\"><span class=\"ez-toc-section\" id=\"Why_Limestone_Variability_Matters_for_Axtra%C2%AE_PHY_GOLD\"><\/span>Why Limestone Variability Matters for Axtra\u00ae PHY GOLD<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">This variability is particularly important when using&nbsp;phytase in animal feed, including solutions like&nbsp;Axtra\u00ae PHY GOLD, which&nbsp;is&nbsp;engineered to&nbsp;rapidly&nbsp;break down phytate in the upper gut.&nbsp;By efficiently degrading phytate,&nbsp;Axtra\u00ae PHY GOLD releases&nbsp;phosphorus, calcium, energy, and amino acids for improved animal growth and feed efficiency.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For enzymes designed to act quickly, these interactions are especially relevant in the&nbsp;early stages&nbsp;of digestion.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To deliver consistent&nbsp;performance across diets,&nbsp;the matrix&nbsp;for&nbsp;Axtra\u00ae PHY GOLD&nbsp;has&nbsp;been&nbsp;carefully developed using extensive trial&nbsp;data,&nbsp;including the effect of limestone solubility&nbsp;on phytase.&nbsp;Rather than assuming uniform mineral behavior, matrix values are tailored to the limestone used, with phosphorus and calcium release calculated based on how the limestone dissolves in the diet, <a href=\"https:\/\/www.iff.com\/food-beverage\/food-ingredients\/value-optimization\/optimize-formulation\/\" data-wpil-monitor-id=\"155\">supporting accurate formulation<\/a> and&nbsp;optimal&nbsp;performance.&nbsp;This type of approach reflects IFF\u2019s research focus on refining phytase matrix values to better account for ingredient variability, as outlined in&nbsp;research on precise phytase matrix development.&nbsp;<\/p>\n\n\n\n<h2 id=\"h-turning-limestone-data-into-practical-formulation-insight\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Turning_Limestone_Data_Into_Practical_Formulation_Insight\"><\/span><strong>Turning Limestone Data Into Practical Formulation Insight<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.iff.com\/animal-nutrition\/services\/\" target=\"_blank\" rel=\"noreferrer noopener\">IFF\u2019s Limestone Analysis Service<\/a>&nbsp;supports&nbsp;more informed formulation decisions by providing a detailed characterization of the limestone used in feed.&nbsp;The service helps nutritionists clearly understand the limestone they are working with by measuring:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Particle size distribution&nbsp;<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Calcium content&nbsp;<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>How quickly the limestone dissolves&nbsp;<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mineral composition&nbsp;<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Having access to this level of detail allows nutritionists to move beyond assumptions and work with actual ingredient data, supporting more precise and consistent formulation decisions.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These results can be used in&nbsp;IFF\u2019s&nbsp;Optimize Feed\u2122&nbsp;formulation&nbsp;tool to generate phytase matrix values and&nbsp;identify&nbsp;the&nbsp;optimal&nbsp;Axtra\u00ae PHY GOLD dose for your specific limestone.&nbsp;&nbsp;By working with&nbsp;accurate&nbsp;ingredient data, nutritionists can support&nbsp;better nutritional values, improved animal performance, and greater feed cost savings.&nbsp;<\/p>\n\n\n<div class=\"m-block blog-cta\"  >\n            <div class=\"blog-cta__content\">\n                                        <div class=\"blog-cta__title\">\n                    Learn more about our limestone analysis service                <\/div>\n                    <\/div>\n                <a href=\"https:\/\/www.iff.com\/animal-nutrition\/services\/\" target=\"_blank\" class=\"c-btn -normal -primary has-icon icon-right\">Discover more <svg width=\"30\" height=\"30\" class=\"icon icon-lib-icon-arrow1 \" aria-hidden=\"true\" role=\"img\"><use xlink:href=\"#lib-icon-arrow1\"><\/use><\/svg><\/a>    <\/div>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-left\" id=\"h-limestone-knowledge-as-a-foundation-for-feed-performance\"><span class=\"ez-toc-section\" id=\"Limestone_Knowledge_as_a_Foundation_for_Feed_Performance\"><\/span><strong>Limestone Knowledge as a Foundation for Feed Performance<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Knowing your limestone&nbsp;plays a key role in&nbsp;effective feed formulation. By understanding its solubility and quality, nutritionists can unlock the full potential of&nbsp;Axtra\u00ae PHY GOLD, ensuring&nbsp;optimal&nbsp;nutrient release, animal performance, and sustainability&nbsp;goals.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Feed efficiency&nbsp;remains&nbsp;a key priority across&nbsp;<a href=\"https:\/\/www.iff.com\/animal-nutrition\/challenges\/\" target=\"_blank\" rel=\"noreferrer noopener\">animal nutrition systems,<\/a> and even small improvements in nutrient&nbsp;utilization&nbsp;can have a meaningful impact at scale. Phytase&nbsp;in animal feed&nbsp;already plays&nbsp;an important role&nbsp;in improving phosphorus availability, but its effectiveness depends on how well the diet supports its activity.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IFF\u2019s limestone analysis service empowers you with the&nbsp;data needed to make informed, science-led decisions.<\/p>\n\n\n<div class=\"m-block blog-cta\"  style='--inline-cta-pretitle-text-transform: uppercase;'>\n            <div class=\"blog-cta__content\">\n                                        <div class=\"blog-cta__title\">\n                    Ready to optimize your feed formulations? Contact our team to learn more about limestone characterization services and expert support for the application of Axtra\u00ae PHY GOLD                <\/div>\n                    <\/div>\n                <a href=\"https:\/\/www.iff.com\/animal-nutrition\/contact\/\" target=\"_blank\" class=\"c-btn -normal -primary has-icon icon-right\">Contact us <svg width=\"30\" height=\"30\" class=\"icon icon-lib-icon-arrow1 \" aria-hidden=\"true\" role=\"img\"><use xlink:href=\"#lib-icon-arrow1\"><\/use><\/svg><\/a>    <\/div>\n\n\n\n<div class=\"m-slider m-slider-v3 l-slider-banner-advanced   gt gb --decor-purple style-v1 #00416b tabs-slider-v2 \"  >\n\n\t<div class=\"c-decor\"><span><\/span><\/div>\n\n\t<div class=\"m-slider__outer container \">\n\n\t\t<div class=\"m-slider__heading l-heading text-left l-heading-v2\">\n\n\t\t\t<div class=\"l-heading__content\">\n\t\t\t\t    <div class=\"c-heading -h2 \">\n\t\t\n\t\t\n\t\t\t\t\t<h2  class=\"c-heading__title\"><span class=\"ez-toc-section\" id=\"Understanding_Limestone\"><\/span>Understanding Limestone<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\n\t\t\n\t\t    <\/div>\n\t<div class=\"c-heading__description is-wysiwyg\">\n\t\t\t\t\t<p>Limestone is more than a calcium source. This three-part series further explores how limestone quality and solubility can impact nutrient utilization, phytase performance, and feed efficiency in poultry diets.<\/p>\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\t<\/div>\n\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\n\t\t\n\t\t<div class=\"m-slider__container swiper js-slider--with-nav js-slider-advanced\" data-slider-thumbs='true' data-slider-trigger='click' data-slider-leading-zero='true'>\n\n\t\t\t<div class=\"m-slider__wrapper swiper-wrapper\">\n\n\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"m-slider__slide swiper-slide\">\n\n\t\t\t\t\t\t\t\t<div class=\"m-banner m-banner--medium order-default\" style=\"--columns-ratio: 75%\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"m-banner__container\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"m-banner__media\">\n\t\t<picture class=\"m-banner__picture\">\n\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t<source media=\"(min-width: 1500px)\" srcset=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/06\/Limestone-samples-animal-nutrition.png\">\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t<source media=\"(min-width: 768px)\" srcset=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/06\/Limestone-samples-animal-nutrition-1024x683.png\">\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t\n\t\t\t\t\t\t\t<source media=\"(min-width: 300px)\" srcset=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/06\/Limestone-samples-animal-nutrition-768x512.png\">\n\t\t\t\n\t\t\t<img decoding=\"async\" class=\"lazy\" loading=\"lazy\" src=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/06\/Limestone-samples-animal-nutrition.png\"  alt=\"Seven clear sample jars displaying limestone materials with progressively smaller particle sizes, ranging from coarse stone fragments to fine powder.\" width=\"1620\" height=\"1080\"\/>\n\t\t<\/picture>\n\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<div class=\"m-banner__inner container flex-left style-light\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"l-banner l-banner-v1 l-gt-d l-gb-d\" style=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t\n<div class=\"l-banner__text\">\n\t    <div class=\"l-banner__inner text-left\">\n\n        <div class=\"c-heading -h2\">\n\t\t\t                <div class=\"c-heading__pre\">Limestone Variability Matters<\/div>\n\t\t\t\n\t\t\t\n\t\t\t        <\/div>\n\n\t\t            <div class=\"c-heading__description is-wysiwyg\">\n\t\t\t\t<p>Not all limestone is the same. Learn how differences in particle size, calcium content, and mineral composition can influence nutrient utilization and feed performance.<\/p>\n            <\/div>\n\t\t\t\t\n\t\t    <\/div>\n\t\t    <div class=\"c-block__btn\">\n\t\t\n\t\t\t<a href=\"https:\/\/www.feedcompounder.co.uk\/3dissue\/feed-compounder-may-june-2025\/?page=30\" target=\"_blank\" class=\"c-btn -normal -secondary has-icon icon-right \"><span class=\"c-btn__txt\">Read article<\/span><span class=\"c-btn__ico\"><svg width=\"30\" height=\"30\" class=\"icon icon-lib-icon-arrow1 \" aria-hidden=\"true\" role=\"img\"><use xlink:href=\"#lib-icon-arrow1\"><\/use><\/svg><\/span><\/a>\n\t\t    <\/div>\n\t<\/div>\n\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"m-slider__slide swiper-slide\">\n\n\t\t\t\t\t\t\t\t<div class=\"m-banner m-banner--medium order-default\" style=\"--columns-ratio: 50%\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"m-banner__container\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"m-banner__media\">\n\t\t<picture class=\"m-banner__picture\">\n\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t<source media=\"(min-width: 1500px)\" srcset=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/09\/20180226-B48K8394.jpg\">\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t<source media=\"(min-width: 768px)\" srcset=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/09\/20180226-B48K8394-1024x683.jpg\">\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t\n\t\t\t\t\t\t\t<source media=\"(min-width: 300px)\" srcset=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/09\/20180226-B48K8394-768x512.jpg\">\n\t\t\t\n\t\t\t<img decoding=\"async\" class=\"lazy\" loading=\"lazy\" src=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/09\/20180226-B48K8394.jpg\"  alt=\"Young broiler chicks gathered around a feeder in a poultry brooding area, standing on wood shavings bedding.\" width=\"1620\" height=\"1080\"\/>\n\t\t<\/picture>\n\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<div class=\"m-banner__inner container flex-left style-light\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"l-banner l-banner-v1 l-gt-d l-gb-d\" style=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t\n<div class=\"l-banner__text\">\n\t    <div class=\"l-banner__inner text-left\">\n\n        <div class=\"c-heading -h2\">\n\t\t\t                <div class=\"c-heading__pre\">Why Limestone Solubility Matters<\/div>\n\t\t\t\n\t\t\t\n\t\t\t        <\/div>\n\n\t\t            <div class=\"c-heading__description is-wysiwyg\">\n\t\t\t\t<p>How quickly does your limestone release calcium? Discover why limestone solubility can affect phosphorus digestibility and why testing your source is key to feed formulation success.<\/p>\n            <\/div>\n\t\t\t\t\n\t\t    <\/div>\n\t\t    <div class=\"c-block__btn\">\n\t\t\n\t\t\t<a href=\"https:\/\/www.feedcompounder.co.uk\/3dissue\/feed-compounder-july-august-2025\/?page=28\" target=\"_blank\" class=\"c-btn -normal -secondary has-icon icon-right \"><span class=\"c-btn__txt\">Read article<\/span><span class=\"c-btn__ico\"><svg width=\"30\" height=\"30\" class=\"icon icon-lib-icon-arrow1 \" aria-hidden=\"true\" role=\"img\"><use xlink:href=\"#lib-icon-arrow1\"><\/use><\/svg><\/span><\/a>\n\t\t    <\/div>\n\t<\/div>\n\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"m-slider__slide swiper-slide\">\n\n\t\t\t\t\t\t\t\t<div class=\"m-banner m-banner--medium order-default\" style=\"--columns-ratio: 50%\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"m-banner__container\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"m-banner__media\">\n\t\t<picture class=\"m-banner__picture\">\n\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t<source media=\"(min-width: 1500px)\" srcset=\"https:\/\/www.iff.com\/wp-content\/uploads\/2024\/10\/Broiler_2.jpg\">\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t<source media=\"(min-width: 768px)\" srcset=\"https:\/\/www.iff.com\/wp-content\/uploads\/2024\/10\/Broiler_2-1024x683.jpg\">\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t\n\t\t\t\t\t\t\t<source media=\"(min-width: 300px)\" srcset=\"https:\/\/www.iff.com\/wp-content\/uploads\/2024\/10\/Broiler_2-768x512.jpg\">\n\t\t\t\n\t\t\t<img decoding=\"async\" class=\"lazy\" loading=\"lazy\" src=\"https:\/\/www.iff.com\/wp-content\/uploads\/2024\/10\/Broiler_2.jpg\"  alt=\"White broiler chickens standing and walking on litter inside a commercial poultry house, with one bird in sharp focus in the foreground and a flock visible in the background.\" width=\"1920\" height=\"1280\"\/>\n\t\t<\/picture>\n\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<div class=\"m-banner__inner container flex-left style-light\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"l-banner l-banner-v1 l-gt-d l-gb-d\" style=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t\n<div class=\"l-banner__text\">\n\t    <div class=\"l-banner__inner text-left\">\n\n        <div class=\"c-heading -h2\">\n\t\t\t                <div class=\"c-heading__pre\">Limestone, Phytase, and Phosphorus Utilization<\/div>\n\t\t\t\n\t\t\t\n\t\t\t        <\/div>\n\n\t\t            <div class=\"c-heading__description is-wysiwyg\">\n\t\t\t\t<p>Explore how limestone characteristics influence phosphorus digestibility and phytase performance, helping nutritionists optimize nutrient utilization and support animal health.<\/p>\n            <\/div>\n\t\t\t\t\n\t\t    <\/div>\n\t\t    <div class=\"c-block__btn\">\n\t\t\n\t\t\t<a href=\"https:\/\/www.feedcompounder.co.uk\/3dissue\/feed-compounder-sept-oct-2025\/?page=34\" target=\"_blank\" class=\"c-btn -normal -secondary has-icon icon-right \"><span class=\"c-btn__txt\">Read article<\/span><span class=\"c-btn__ico\"><svg width=\"30\" height=\"30\" class=\"icon icon-lib-icon-arrow1 \" aria-hidden=\"true\" role=\"img\"><use xlink:href=\"#lib-icon-arrow1\"><\/use><\/svg><\/span><\/a>\n\t\t    <\/div>\n\t<\/div>\n\n\t<div class=\"l-banner__media\">\n\t\t\n\t\t\t\n\t\t\t\n\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\n\t\t\t\t\t\t\t<div class=\"l-slider-nav container\">\n\t\t\t\t\t\t\t\t<div class=\"c-slider-nav c-slider-nav-v1 text-left\">\n\t\t\t\t\t\t\t\t\t\t\t<button class=\"c-slider-nav__item js-nav__item swiper-slide is-active\">\n\n\t\n\t\n\t\t\t<span class=\"c-slider-nav__label\">Part I<\/span>\n\t\n\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t<button class=\"c-slider-nav__item js-nav__item swiper-slide\">\n\n\t\n\t\n\t\t\t<span class=\"c-slider-nav__label\">Part II<\/span>\n\t\n\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t<button class=\"c-slider-nav__item js-nav__item swiper-slide\">\n\n\t\n\t\n\t\t\t<span class=\"c-slider-nav__label\">Part III<\/span>\n\t\n\t<\/button>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\n\t\t\t\n\t\t<\/div>\n\n\t\t\n\t\t\n\t<\/div>\n\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-left\" id=\"h-common-questions-about-phytase-in-animal-feed\"><span class=\"ez-toc-section\" id=\"Common_Questions_About_Phytase_in_Animal_Feed\"><\/span><br><strong>Common Questions About\u00a0Phytase\u00a0in Animal Feed<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1779388086458\"><strong class=\"schema-faq-question\"><strong>1. Can limestone variability affect feed consistency?\u00a0<\/strong><\/strong> <p class=\"schema-faq-answer\">Yes. Differences in limestone composition and solubility can lead to variation in nutrient availability and calcium phosphorus balance, which may result in inconsistent performance across batches if not properly accounted for.\u00a0This variability can also influence how consistently phytase in animal feed performs under real-world conditions.\u00a0<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1779388115958\"><strong class=\"schema-faq-question\"><strong>2. How can better limestone data improve formulation decisions?\u00a0<\/strong><\/strong> <p class=\"schema-faq-answer\">By understanding how a specific limestone behaves, nutritionists can make more informed adjustments to formulation and enzyme strategies. This helps ensure phytase in animal feed delivers more consistent results, improving accuracy, consistency, and overall feed efficiency outcomes.<\/p> <\/div> <\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Phytase in animal feed plays a critical role in unlocking nutrients and improving feed efficiency. But real-world results&nbsp;aren\u2019t&nbsp;always consistent.&nbsp;Even when formulations look similar on paper,&nbsp;ingredient variability, especially from mineral sources, can strongly&nbsp;infuence&nbsp;performance.&nbsp; One often-overlooked factor?&#8230;<\/p>","protected":false},"author":1,"featured_media":50318,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[127],"tags":[115],"class_list":["post-49855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-animal-nutrition-health","tag-enzymes"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.8 (Yoast SEO v28.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Phytase in Animal Feed: Limestone &amp; Feed Efficiency<\/title>\n<meta name=\"description\" content=\"Learn how limestone solubility impacts phytase in animal feed, improving feed efficiency, calcium phosphorus balance, and formulation accuracy.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.iff.com\/es\/media\/stories\/optimizing-phytase-animal-feed\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Optimizing Phytase in Animal Feed: Performance Starts With Knowing Your Limestone\" \/>\n<meta property=\"og:description\" content=\"Learn how limestone solubility impacts phytase in animal feed, improving feed efficiency, calcium phosphorus balance, and formulation accuracy.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.iff.com\/es\/media\/stories\/optimizing-phytase-animal-feed\/\" \/>\n<meta property=\"og:site_name\" content=\"IFF\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/InternationalFlavorsandFragrances\" \/>\n<meta property=\"article:published_time\" content=\"2026-06-05T12:40:31+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-25T18:53:16+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.iff.com\/wp-content\/uploads\/2026\/06\/Phytase-in-Animal-Feed.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1004\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"devdigitalsilk\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"devdigitalsilk\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.iff.com\\\/media\\\/stories\\\/optimizing-phytase-animal-feed\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.iff.com\\\/media\\\/stories\\\/optimizing-phytase-animal-feed\\\/\"},\"author\":{\"name\":\"devdigitalsilk\",\"@id\":\"https:\\\/\\\/www.iff.com\\\/#\\\/schema\\\/person\\\/22ed1bc307a58365b58bf7663527b39e\"},\"headline\":\"Optimizing Phytase in Animal Feed: Performance Starts With Knowing Your Limestone\",\"datePublished\":\"2026-06-05T12:40:31+00:00\",\"dateModified\":\"2026-09-25T18:53:16+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.iff.com\\\/media\\\/stories\\\/optimizing-phytase-animal-feed\\\/\"},\"wordCount\":1302,\"publisher\":{\"@id\":\"https:\\\/\\\/www.iff.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.iff.com\\\/media\\\/stories\\\/optimizing-phytase-animal-feed\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.iff.com\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/Phytase-in-Animal-Feed.jpeg\",\"keywords\":[\"Enzymes\"],\"articleSection\":[\"Animal Nutrition &amp; 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