Protein power: whey and collagen combo builds stronger muscles and bones

This study tested whether taking whey protein together with collagen peptides helps resistance-trained men build more muscle and bone density than either supplement alone or a placebo. Forty healthy men aged 18–35 who already lifted weights took one of four supplements for 8 weeks while following a supervised training program. The group taking both whey and collagen showed the biggest gains in muscle mass, spine bone density, and strength, with no serious side effects.