When it comes to building muscle, not all proteins are created equal
Researchers find ground beef packs bigger muscle-building punch than soy-based alternative
New research from the University of Arkansas for Medical Sciences (UAMS) reveals that 100% ground beef packs a bigger punch for muscle protein synthesis than a soy-based counterpart. In fact, the study suggests that a person would need double the amount of soy-based protein to achieve the same results.
Published in the American Journal of Clinical Nutrition, the study examined the anabolic response — how the body builds muscle — after consuming a 4-ounce beef patty versus one or two 4-ounce patties of a soy-based product. The results? Just one serving of beef did the job, while two servings of the soy-based alternative were necessary to see the same muscle-building benefits.
For those counting calories, the difference is striking: Beef delivered these results with fewer calories — 279 compared to 462.
“While both beef and soy are considered ‘complete’ proteins, the amino acids in beef are simply more available for the muscle to use efficiently,” said Robert Wolfe, Ph.D., a UAMS professor of geriatrics and the study’s principal investigator. “This efficiency can be important since the body is in a constant state of protein turnover to rebuild and repair proteins for functional health, especially when combined with physical activity and as part of healthy development and aging.”
The study is part of a growing body of evidence highlighting the importance of quality protein for muscle health, especially as we age. Muscle mass plays a key role in maintaining strength, balance and the ability to age independently. For older adults, optimizing muscle health through diet and exercise can make a big difference in quality of life.
“Protein quality matters as much as quantity,” Wolfe said. “This research underscores the fact that foods like nutrient-rich ground beef can offer more muscle-building benefits, and that’s critical as people make dietary choices, especially when balancing calorie intake.”
The UAMS study was conducted on 24 healthy adults between the ages of 18 and 40, who were randomly assigned to consume one of the three test meals — one 4-ounce 100% ground beef patty (80% lean, 20% fat); one 4-ounce Impossible™ patty; or two 4-ounce Impossible™ patties.
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