Hans H. Stein

Anti-nutritional Factor; Digestibility; Enzyme-treated Soybean Meal; Soybean Meal; Weanling Pigs

Enzyme-treated soybean meal in diets for weanling pigs: review

Torres-Mendoza, Leidy J., Hans H. Stein. 2026. Enzyme-treated soybean meal in diets for weanling pigs: review. Anim Biosci 2026;39(10):250731 doi.org/10.5713/ab.250731 pISSN 2765-0189 eISSN 2765-0235. Link to full text.

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Authors:

Torres-Mendoza, Stein

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Effects of soybean hulls in diets fed to late gestating and lactating sows on lactational performance and pig growth performance

Soybean hulls (SBH) are a co-product of soybeans and provide a considerable amount of fiber, which helps with satiety and reduces stereotypic behaviors. The chemical composition of SBH is determined by the efficacy of the dehulling process, and the fiber in SBH may include varying levels of cellulose, hemicellulose, lignin, pectin, proteins and minor extractives. Dietary fiber is considered good for gestating sows, but it is not known if the use of soybean hulls as the main source of fiber will also result in greater performance of lactating sows. Therefore, the objective of this experiment was to test the hypothesis that addition of 8 or 16% soybean hulls to diets for lactating sows would improve reproductive performance and immunity of lactating sows compared with sows fed diets based on corn-soybean meal and no soybean hulls.

Keywords:

Soybean hulls, Fiber, reproductive performance, Sows, Pigs

Authors:

Martins, Ibagon, Lee, Stein

Publication Type:

microbial phytase, plasma inositol, Weanling pigs

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Impact of Microbial Phytase on Plasma Inositol in Weanling Pigs

Maella A. P. and H. H. Stein. 2026. Impact of Microbial Phytase on Plasma Inositol in Weanling Pigs. 25th Annual Midwest Swine Nutrition Conference Proceedings. Danville, Indiana. Sep 10, 2026 Link to full text.

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Authors:

Mallea, Stein

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Conference proceedings

Standardized total tract digestibility of calcium in 14 sources of calcium carbonate produced in Latin America fed to growing pigs

Most cereal grains and grain co-products contain very low concentrations of Ca, and the majority of Ca in commercial diets for pigs is, therefore, provided by Ca carbonate. Excess dietary Ca can reduce digestibility of P, and it is, therefore, important that digestibility of Ca in Ca carbonate is determined to allow formulation of diets based on digestible Ca.

Concentration of Ca in Ca carbonate may vary among sources depending on raw materials, geological origin, and processing methods. Differences in apparent total tract digestibility (ATTD) and standardized total tract digestibility (STTD) of Ca among sources produced in the USA have been observed, and Ca carbonate produced in Europe, Asia, and South Africa may have different STTD of Ca than Ca carbonate produced in the USA. However, no values for STTD of Ca in Ca carbonate produced in Latin America have been reported, and it is unknown if STTD of Ca differs among sources produced in different countries within this region. Therefore, the objective of this experiment was to test the hypothesis that there are differences in the STTD of Ca among sources of Ca carbonate obtained from different countries in Latin America.

Keywords:

Calcium, Digestibility, Limestone, Phytase, Standardized total tract digestibility

Authors:

Guerrero, Lee, Stein

Publication Type:

Canola meal, Corn distillers dried grains with solubles, Energy retention, Growing pigs, Heat stress, Net energy, nitrogen balance, Low-Kunitz soybean meal

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Use of soybean meal to mitigate the negative effects of heat stress in growing pigs

When ambient temperature exceeds the thermal neutral zone, pigs experience heat stress that reduces productive performance. Alternative co-products such as canola meal and corn distillers dried grains with solubles (DDGS) contain more fiber than soybean meal (SBM), which may increase heat production in pigs and may exacerbate heat stress compared with SBM, which contains less fiber and provides bioactive components that may support immune function. Therefore, the objective of this experiment was to test the hypothesis that growing pigs fed diets containing soybean meal perform better under heat stress than pigs fed diets containing canola meal or corn DDGS.

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Authors:

Rodriguez, Lee, Stein

Publication Type:

Extension Reports and other non-refereed publications

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Dietary 25-hydroxyvitamin D3 boosts Ca, P absorption in late gestation sows

Guerrero, D., S. A. Lee, and H. H. Stein. 2026. Dietary 25-hydroxyvitamin D3 boosts Ca, P absorption in late gestation sows. National Hog Farmer. On-line edition. July 30, 2026. Link to full text.

Keywords:

Vitamin D3, Calcium, Phosphorus, Sows

Authors:

Guerrero, Lee, Stein

Publication Type:

Ileal Digestibility of Amino Acids in Pistachio Blanks and Growth Performance of Weanling Pigs Fed Diets Containing Pistachio Blanks as a Source of Fiber

Kim, Yeonwoo, Hans H. Stein. 2026. Ileal Digestibility of Amino Acids in Pistachio Blanks and Growth Performance of Weanling Pigs Fed Diets Containing Pistachio Blanks as a Source of Fiber. Journal of Animal Science, Volume 104, Issue Supplement_3, skag107.203, doi.org/10.1093/jas/skag107.203 Link to abstract.

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Amino acids, Growth performance, Weanling pigs

Authors:

Kim, Stein

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Why a New Net Energy Value for Soybean Meal Fed to Pigs Is Needed

Stein, Hans H. 2026. Why a New Net Energy Value for Soybean Meal Fed to Pigs Is Needed. Journal of Animal Science, Volume 104, Issue Supplement_3, skag107.219, doi.org/10.1093/jas/skag107.219 Link to abstract.

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Net energy, nitrogen retention, Pigs, Soybean meal

Authors:

Stein

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Implications of Increased Nitrogen Retention in Modern Pigs

Stein, Hans H. 2026. Implications of Increased Nitrogen Retention in Modern Pigs. Journal of Animal Science, Volume 104, Issue Supplement_3, skag107.034, doi.org/10.1093/jas/skag107.034 Link to abstract.

Keywords:

Amino acids, Crude protein, nitrogen retention, Pigs

Authors:

Stein

Publication Type:

Amino acids, Carcass composition, Growth performance, nitrogen balance, Soybean meal

Impact of Soybean Meal on Growth Performance, Net Energy, Nitrogen Retention, and Greenhouse Gas Production When Included in Diets for Growing Pigs

Ibagon, Jimena A., Hans H. Stein, Su A Lee. 2026. Impact of Soybean Meal on Growth Performance, Net Energy, Nitrogen Retention, and Greenhouse Gas Production When Included in Diets for Growing Pigs. Journal of Animal Science, Volume 104, Issue Supplement_3, skag107.150, doi.org/10.1093/jas/skag107.150 Link to abstract.

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Authors:

Ibagon, Stein, Lee

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Determination of Net Energy and Nitrogen Balance in Group-housed Pigs Fed Diets Containing Varying Levels of Fiber from Soybean Hulls

Lee, Su A, Hans H Stein. 2026. Determination of Net Energy and Nitrogen Balance in Group-housed Pigs Fed Diets Containing Varying Levels of Fiber from Soybean Hulls. Journal of Animal Science, Volume 104, Issue Supplement_3, skag107.168, doi.org/10.1093/jas/skag107.168 Link to abstract.

Keywords:

Fiber, Net energy, swine

Authors:

Lee, Stein

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Effects of Xylanase or Stimbiotic on Apparent Ileal, Cecal, and Total Tract Digestibility of Energy and Dietary Fiber in Diets fed to Growing Pigs

Acosta, Jessica P., Gemma González-Ortiz, Hans H. Stein. 2026. Effects of Xylanase or Stimbiotic on Apparent Ileal, Cecal, and Total Tract Digestibility of Energy and Dietary Fiber in Diets fed to Growing Pigs. Journal of Animal Science, Volume 104, Issue Supplement_3, skag107.186 doi.org/10.1093/jas/skag107.186 Link to abstract.

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Digestibility, Energy, Fiber, Pigs, stimbiotic, Xylanase

Authors:

Acosta, Gonzalez-Ortiz, Stein

Publication Type:

Amino acids, Growth performance, Weanling pigs

Ileal Digestibility of Amino Acids in Pistachio Blanks and Growth Performance of Weanling Pigs Fed Diets Containing Pistachio Blanks as a Source of Fiber

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Authors:

Kim, Stein

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Why limestone becomes important: Practical implications of supplemental phytase for increased calcium digestibility of limestone in growing pigs

Lee, S. A, and H. H. Stein. 2026. Why limestone becomes important: Practical implications of supplemental phytase for increased calcium digestibility of limestone in growing pigs. Book of abstracts. IFTC 2026. 3^rd International Feed Technology Congress. Victam. Utrecht. The Netherlands, June 2-3, 2026. Page 94 - 95 Link to full text.

Keywords:

Limestone, Phytase, Calcium digestibility, Growing pigs

Authors:

Lee, Stein

Publication Type:

Conference proceedings

Use of feed technology to improve energy and nutrient utilization of diets for growing pigs. Book of abstracts.

Stein, H. H. 2026. Use of feed technology to improve energy and nutrient utilization of diets for growing pigs. Book of abstracts. IFTC 2026. 3^rd International Feed Technology Congress. Victam. Utrecht. The Netherlands, June 2-3, 2026. Page 11-14. Link to full text.

Keywords:

feed technology, Energy, Diets, Growing pigs

Authors:

Stein

Publication Type:

Conference proceedings

Reducing dietary protein in corn–soybean meal diets by reducing soybean meal and adding synthetic amino acids does not affect net energy or ileal starch digestibility, but increases ileal amino acid digestibility and reduces nitrogen retention

Cristobal, Minoy, Su A. Lee, Carl M. Parsons, Hans H. Stein. 2026. Reducing dietary protein in corn–soybean meal diets by reducing soybean meal and adding synthetic amino acids does not affect net energy or ileal starch digestibility, but increases ileal amino acid digestibility and reduces nitrogen retention. Journal of Animal Science, 2026, 104, skag129 doi.org/10.1093/jas/skag129.

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low protein, Net energy, nitrogen retention, Pigs, Soybean meal, synthetic amino acids

Authors:

Cristobal, Lee, Parsons, Stein

Publication Type:

Dietary fiber, Feed ingredients, insoluble dietary fiber, Pigs, soluble dietary fiber, Total dietary fiber

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Soluble dietary fiber, insoluble dietary fiber, and total dietary fiber in feed ingredients used in diets for pigs

Acosta, Jessica P., Lia V. Guardiola, Neil W. Jaworski, Hans H. Stein. 2026. Soluble dietary fiber, insoluble dietary fiber, and total dietary fiber in feed ingredients used in diets for pigs. Journal of Animal Science, 2026, 104, skag141 doi.org/10.1093/jas/skag141 Link to full text.

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Authors:

Acosta, Guardiola, Jaworski, Stein

Publication Type:

crystalline amino acids, nitrogen balance, reproductive performance, Sows, Soybean meal

Reducing dietary crude protein for gestating and lactating sows reduces daily nitrogen retention, but reproductive performance is not impacted by diet protein concentration

Ibagon, Jimena A., Su A Lee, Hans H. Stein. 2026. Reducing dietary crude protein for gestating and lactating sows reduces daily nitrogen retention, but reproductive performance is not impacted by diet protein concentration. Journal of Animal Science and Biotechnology 7:125

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Authors:

Ibagon, Lee, Stein

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Digestibility of energy, high-protein canola meal, conventional canola meal, Soybean meal, Lactating sows

Read more about Reducing dietary crude protein for gestating and lactating sows reduces daily nitrogen retention, but reproductive performance is not impacted by diet protein concentration

Digestibility of energy and concentrations of digestible and metabolizable energy in high-protein canola meal, conventional canola meal, and soybean meal in diets fed to lactating sows

Canola meal and soybean meal (SBM) are the most commonly used sources of amino acids in diets for swine. However, via genetic selection, varieties of canola with greater concentrations of crude protein and reduced concentrations of fiber have been identified. Following oil extraction, the resulting high-protein canola meal (CM-HP) contains 3 to 5 % more crude protein than conventional canola meal (CM-CV). It is, therefore, expected that CM-HP contains more digestible and metabolizable energy than CM-CV, but this hypothesis has not been experimentally verified (Liu et al., 2016). Therefore, it is the objective of this experiment to determine the apparent total tract digestibility (ATTD) of energy and concentrations of digestible energy (DE) in CM-HP, CM-CV, and SBM when fed to lactating sows.

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Authors:

Yeonwoo, Ibagon, Stein

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