This Ancient Warrior Diet Builds More Muscle Than Protein Shakes

From keto to intermittent fasting, most popular diets today focus on one goal: weight loss. But if your priority is building muscle rather than shedding pounds, cutting calories won’t get you there. In fact, most research suggests that if you want to gain muscle you have to eat more quality calories and protein or at least maintain the calories you're already eating. But if you do insist on starting a diet with summer just around the corner, focus on one that encourages gains like the Viking diet.