Q: I suffer from gastrointestinal distress, so putting on muscle mass is a challenge. What should I eat?  

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A: Try a meal plan influenced by the Paleo Diet, which cuts foods (commercial dairy, gluten, and compounds in cereal grains and legumes) that may cause gastrointestinal issues. “The Paleo approach bases the diet on animal protein, fruits, and vegetables,” says nutritionist Nate Miyaki. “Given that you want to put on muscle, you’ll need a couple more starchy carbs than is traditionally recommended in order to properly fuel and recover from intense strength-training sessions.” Try using potatoes as your primary source of carbohydrates.