After swimming, rats that drank whey protein had more leucine in their blood than those drinking other proteins at 1 and 1.5 hours after eating.

After swimming, rats that drank whey protein had more leucine inside their muscles than those drinking other proteins for up to 1.5 hours after eating.

When rats swam for two hours and consumed dairy proteins (whey, milk, or caseinate), their muscle building rates were higher than those eating soy protein at specific times after eating.

When rats swam for two hours and then consumed whey protein, their muscle building rate peaked at 60 minutes with a value of 7.76% per day.

When rats ate a larger dose of regular whey protein, their blood had more leucine than when they ate the same amount of hydrolyzed whey protein an hour later.

When rats ate more milk protein up to a certain amount, their muscle building increased, but eating even more didn't help further.