ST. LOUIS—Consuming a blend of proteins (isolated soy protein, whey protein and casein) may have nutritional and performance benefits compared to intake of a single protein, according to a new review published in a supplement to the Journal of the American College of Nutrition (2009; 28(4:S1):464S-472S). The review, “The Rationale for Consuming Protein Blends in Sports Nutrition,” was authored by Gregory Paul, Ph.D., global director of sports nutrition forSolae LLC.
“Protein is considered by many to be the most important macronutrient for humans because of the numerous roles protein plays in the body,” Paul said. “My review proves not only the importance of protein, but also potential benefits of combining different proteins, particularly to help promote recovery after exercise activity.”
Isolated soy protein, whey protein and casein are all classified by FDA as nutritionally complete proteins; however, each one differs in digestion rate, which could create a “timed release” effect that would prolong the time the amino acids are delivered to the body. Paul also noted comparative studies between isolated soy protein and whey protein show similar increases in lean body mass whereas whey protein may have an advantage over casein.
“Today, more and more sports nutrition products such as nutrition bars and ready-to-drink and powered beverages, include blends of soy and dairy protein,” Paul added. “Our sports nutrition customers continue to look for ways to incorporate protein blends into new products due to the nutritional, functional and economical advantages. Additionally, consumers seem to prefer the taste of products that include a blend of proteins versus one type of protein.”
In a release, Solae noted its sensory data shows a sports nutrition beverage formulated with SUPRO® XF, a new isolated soy protein, in combination with a dairy protein is preferred by consumers 2-to-1 over the leading, all-dairy commercial brand.
