What question did this study set out to answer?

This research evaluates how increasing trypsin inhibitor levels, alongside protease and acidifier, impacts nursery pig growth and nutrient utilization.

May 9, 2026Journal of Animal Science

PS5-7. Evaluation of Trypsin Inhibitor Unit Level with or Without the Addition of Protease and an In-feed Acidifier on Nursery Pig Growth Performance, Fecal Dry Matter, and Nutrient Digestibility

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Authors

SCSierra M CollierKansas State University SWSkyler WardKansas State University KGK. GaffieldKansas State University

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Implication

Randomized trial assesses growth performance and nutrient digestibility in nursery pigs with dietary additives, suggesting mitigations for high trypsin inhibitors.

Key Points

This research evaluates how increasing trypsin inhibitor levels, alongside protease and acidifier, impacts nursery pig growth and nutrient utilization.
360 barrows were assigned to 8 treatments in a randomized complete block design over 40 days.
Assessments included daily gain (ADG), feed intake (ADFI), and nutrient digestibility based on fecal samples.
Diets were formulated with varying trypsin inhibitor units and included either or both additives.
Increased trypsin inhibitor levels decreased ADG, ADFI, and growth-to-feed ratio (G:F) (P<0.05).
Pigs on diets with protease or acidifier showed better performance in high TIU levels compared to controls.
An interaction in total tract digestibility indicated that acidifier improved digestibility at lower TIU levels but not at higher levels (P=0.028).

Cite This Study

Collier et al. (2026) studied this question.

synapsesocial.com/papers/69fed090b9154b0b82877af5 https://doi.org/10.1093/jas/skag107.365

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Implication

Randomized trial assesses growth performance and nutrient digestibility in nursery pigs with dietary additives, suggesting mitigations for high trypsin inhibitors.

PS5-7. Evaluation of Trypsin Inhibitor Unit Level with or Without the Addition of Protease and an In-feed Acidifier on Nursery Pig Growth Performance, Fecal Dry Matter, and Nutrient Digestibility

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Member takes

Implication

Key Points

Cite This Study

PS5-7. Evaluation of Trypsin Inhibitor Unit Level with or Without the Addition of Protease and an In-feed Acidifier on Nursery Pig Growth Performance, Fecal Dry Matter, and Nutrient Digestibility

Discussion

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Implication

Key Points

Cite This Study

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