Taking collagen peptides while doing strength training does not lead to greater increases in maximum strength in young men compared to strength training alone, even though it may increase muscle mass and protein markers.

In young men who exercise recreationally, taking 15 grams of collagen peptides daily along with a 12-week strength training program results in greater gains in muscle mass and more changes in muscle proteins than strength training alone with a placebo.

Strength training alone helps middle-aged men build muscle and lose fat, but adding this collagen supplement makes those improvements even better.

Strength training with this collagen supplement doesn't make middle-aged men significantly stronger in leg presses than taking a placebo.

Doing strength training alone helps middle-aged men build stronger bones, but adding this collagen supplement doesn't make a bigger difference than a placebo or whey protein.

Middle-aged men doing strength training and taking this collagen supplement build 1.6 kg more muscle than those taking a placebo.