Milk beats soy for muscle gain

Apr 09, 2007

Got milk? Weightlifters will want to raise a glass after a new study found that milk protein is significantly better than soy at building muscle mass.

The study, conducted by a team of researchers at McMaster's Department of Kinesiology, was recently published in the American Journal of Clinical Nutrition. It compared how much muscle protein young men gained after completing a heavy weight workout followed by consumption of equivalent amounts of protein as either fluid skim milk or a soy drink.

"Our thinking going into the study was that milk would be better than soy," says Sarah Wilkinson, lead researcher and a graduate student in the Department of Kinesiology. "We suspected this would be the case because of work done by French researchers. However, we were really impressed by how much greater the gains in muscle protein with milk were."

The findings would suggest that if men consume only skim milk (two cups) after each of their workouts, they would gain almost twice as much muscle in 10 weeks than if they drank the same amount of protein as a soy drink.

"This is an interesting finding, since soy and milk proteins are considered to be complete proteins that are basically equivalent from a nutritional standpoint," explains Stuart Phillips, associate professor of kinesiology, who was also involved in the study. "Our findings clearly show that milk proteins are a superior source of protein in producing muscle mass gains in response to weightlifting."

Scientists also analyzed the composition of milk and soy proteins and did not find remarkable differences. At this stage, researchers are uncertain why milk proteins were so much more effective than soy. However, the two main types of proteins in milk, whey and casein, may have intrinsic properties that are advantageous for supporting muscle growth.

"The plan at this point is to follow this up with a long-term study to see if the findings from this short-term study can be replicated," says Phillips.

Source: McMaster University

Explore further: Conjoined Brazilian twin dies after surgery

add to favorites email to friend print save as pdf

Related Stories

Spacewalking astronauts finish extensive, trick cable job

13 hours ago

(AP)—Spacewalking astronauts successfully completed a three-day cable job outside the International Space Station on Sunday, routing several-hundred feet of power and data lines for new crew capsules commissioned ...

IOC defends Rio legacy amid green protests

15 hours ago

Ecological protests on Saturday dogged the final day of an International Olympic Committee executive board meeting in Rio as green campaigners slated the choice of a nature reserve to hold the golf event ...

Recommended for you

Seth Mnookin on vaccination and public health

7 hours ago

Seth Mnookin, an assistant professor of science writing and associate director of MIT's Graduate Program in Science Writing, is the author of "The Panic Virus: The True Story Behind the Vaccine-Autism Controversy" ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.