Does Supplemental Dietary Microbial Phytase Improve Amino Acid Utilization? A Perspective That It Does Not

    Environmental concerns regarding the excretion of large quantities of P in effluents from intensive animal production operations have led to the current routine use of microbial phytase. Following extensive investigations, microbial phytase supplementation of plant-based diets has been shown to consistently improve the utilization of plant phytin-bound P, and a plethora of data is available in the literature to support this. The release of P from plant phytin during the digestion process is theorized to release other nutrients that may be bound in the phytin complex. Furthermore, hydrolysis of phytin is hypothesized to attenuate the inhibitory effect of phytin on digestive enzymes and consequently to ameliorate the depression of nutrient absorption. Although a limited pool of data exists on small increases in apparent amino acid digestibility in swine and poultry literature, these increases have seldom translated into improved growth performance when the effect of enhanced phytin P utilization is factored out. Conversely, there are also data on a lack of response in amino acid utilization (both pre- and post absorptive) to microbial phytase supplementation. Several factors might play important roles in amino acid utilization response to dietary microbial phytase supplementation. Identification of such factors and quantification of their effects on the magnitude of response to phytase would be important in ascribing a meaningful 'amino acid response factor' (or amino acid equivalency value) to supplemental microbial phytase in plant-based diets and in moving the swine and poultry nutrition industry ahead
    Document information
    Product / service: Phytases
    Publication date: 01/01/2003
    Authors: Adeola O, Sands JS
    Doctype: Publications & Citations
    Publication / conference: J Anim Sci, volume 81, issue 2
    Regions and countries: Global
    Keywords: absorption, amino, acid, digestibility, animal, bound, complex, dan, dietary, diet, diets, digestibilities, digestion, digestive, enzymes, effects, enzyme, equivalency, excretion, growth, performance, hydrolysis, identification, industry, inhibitory, effect, microbial, phytase, nutrient, nutrients, nutrition, p, phytin, pigs, plant, poultry, production, quantification, quantity, response, supplementation, swine, utilization
    Production challenge(s): Gut health
    Diets: All diets
    Brands: Axtra® PHY, Phyzyme® XP, Optimize Feed, Phycheck, FASTKit assay
    Resource ref: 7685
    This material is related to a conference
    Recently viewed

    Your single source for articles, publications & citations, product information and more...

    Much of the content on this site is freely available. Register now to receive email notifications based on your content preferences. Partners may also request access to the restricted area of the Knowledge Centre for technical product information such as trial data, reports and much more.

    Register for content notifications

    DuPont's Nutrition & Biosciences and IFF are coming together

    This isn't about forming another industry giant. This is about merging curiosity and capability to create unique, leading-edge solutions at the intersection of science and creativity.

    To learn more about IFF and the merger, go to www.iff.com.