30 Foods You Can Eat and Not Gain Weight

14. Tuna

jutaifoods.com

Tuna is a fish with essential fatty acids and hardly any calories. It’s also a favorite type of fish among pro athletes and bodybuilders for a reason: it’s full to the brim with muscle-building protein. If an increase in protein intake is your goal, be sure to purchase canned tuna in water and not oil.

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