Think you need 2+ grams of protein per pound to grow? A meta-analysis of 49 trials and 1,863 adults found muscle-building benefits leveled off around 1.6 g/kg per day. The upper confidence limit reached about 2.2 g/kg, giving lifters a practical range instead of an arbitrary mega-dose. Trained lifters gained the most from supplementation, while the benefit shrank with age. Here is what the numbers mean for your plate, your shaker bottle and your budget.
This page is available in