Use of soybean processing by-products

The nutritional impact of adding by-products of soybean meal processing (gums, soapstock, crude oil, foreign matter) during processing was evaluated in swine and poultry studies.  These soybean meal by-products can be routinely added back during soybean processing.  In one swine study they found that adding these by-products to the meal significantly (P<0.05) reduced the apparent ileal dry matter, organic matter, crude protein and amino acid digestibilities compared to diets containing no soybean by-products.  Poultry studies confirmed the negative impact on the nutritional value of the soybean meal when gums, soapstock and soybean foreign matter was added back during processing.

Bruce, K.J. and co-workers.  2006.  Evaluation of the inclusion of soybean oil and soybean processing by-products to nutritional composition and digestibility in swine and poultry.  J. Animal Sci. 84: 1403-1414.