Top 10 superfoods for muscle mass gain

3. Beef. In 100 grams of beef, 19 g of protein. In addition to protein, beef is a source of iron, which helps saturate the cells of the body with vital oxygen. Especially valuable is meat for people who work physically and go in for sports. In beef, there are also proteins such as collagen and elastin, the main building blocks of intraarticular ligaments.

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