In a recent study, Japanese scientists have reported that supplementation with whey protein had a direct effect on fat metabolism, unlike other protein sources like casein and soy.
When fed whey protein, results showed a decrease in fatty acid synthesis in the liver and increased fat utilization in muscle. Most interestingly, these results were similar to that observed in rodents placed on an exercise program.
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Whey Protein and Muscle Protein Synthesis
Aside from whey protein’s unique capacity to stimulate muscle protein synthesis, the researchers suggested that whey protein may also improve fat metabolism that may result in a reduction in body fat during exercise. This theory is in line with the research completed on Whey Isolate with bodybuilders undergoing intense resistance training.
In one of the clinical trials completed on Whey Isolate, they compared supplementation with (1.5g/kg/day) alongside a standard (but high quality) protein. The bodybuilders provided with not only gained significantly more muscle mass they also demonstrated a significant decrease in body fat.
Effect on Body Composition
This beneficial effect on body composition was not detected in the group given the protein placebo, and was achieved without modification of a healthy, bodybuilding diet.
In this study, a liquid protein supplement (providing 42 grams of protein and 24 grams of carbohydrate) was given to a group of healthy participants during an intense exercise program that consisted of cardio and weight training exercise.
Those participants given the protein supplement demonstrated higher circulating IGF-1 levels after 6 months of training, whereas a similar group given an equivalent dose of carbohydrate showed a decrease in this growth factor.
Whey and Casein Play a Big Role of Protein Supplementation
The protein supplement in this research contained a blend of dairy proteins. Whey + casein contains a precision blend of the finest dairy protein available. This study shows yet another important role of protein supplementation for people that want the best results from intense exercise training.