I ain't gaining weight, however my diet is pretty good.

More...: At your age your caloric need is higher.....eat more. Get your stool examined for ova and parasites.

Remember: Gaining weight isn't just about the "health" of your diet, it has to do with the balance of calories too. But to be able to better guide you, more information is necessary. Consider a formal HealthTap consultation for better guidance. Good luck.

Foods to help with : healthy weight gain: almonds, cashews, pecans, sunflower seeds, flax seeds, walnuts, hummus, avocados, granola, trail mix, dried fruits, extra virgin olive oil, canola oil, protein shakes, protein bars, lean meats, poultry, fish, Smoothies (with added silken tofu or powdered milk), Greek yogurt (full –fat), pasta/ bagels & use of juice rather than soda. Some people add whey proteins.