Medically reviewed by Maggie Moon, MS, RD Both diet and exercise are essential for building muscle. When it comes to ...
A 6-ounce tuna filet has around 41 grams of protein and 1 gram of fat, Holtzer says. Granted, that's larger than a usual 3-ounce serving of chicken. However, a 3-ounce tuna filet likely has around 21 ...