Building muscle requires eating enough protein, enough calories, and the right mix of carbohydrates and fats to fuel your training and recovery. The single most important dietary factor is protein intake: aim for 1.6 to 2.2 grams of protein per kilogram of body weight per day. For a 180-pound person, that works out to roughly 130 to 180 grams of protein daily.
How Much Protein You Actually Need
A large 2018 meta-analysis found that eating an average of 1.6 grams of protein per kilogram of body weight per day maximized muscle gains from resistance training. Some people benefit from going higher, up to about 2.2 g/kg/day, but pushing beyond that range doesn’t appear to add further muscle in most cases. In practical terms, if you weigh 150 pounds (68 kg), your target range is roughly 109 to 150 grams of protein per day. If you weigh 200 pounds (91 kg), you’re looking at 145 to 200 grams.
Spreading that protein across three to four meals works better than cramming it into one or two sittings. Each meal should deliver a meaningful dose of leucine, the amino acid that acts as a trigger for muscle repair and growth. Adults need about 42 milligrams of leucine per pound of body weight across the full day. You don’t need to track leucine separately if you’re eating high-quality protein sources at each meal, but it’s worth knowing which foods are naturally rich in it: chicken, turkey, fish, eggs, cottage cheese, pumpkin seeds, and black beans all rank high.
Calories: How Much Extra to Eat
You can’t build muscle without giving your body extra energy to work with. The current recommendation is a surplus of about 300 to 500 calories per day above what you burn. This range gives your body enough raw material to add lean tissue while keeping fat gain to a minimum. Going much higher than 500 calories over maintenance tends to accelerate fat storage without speeding up muscle growth.
If you’re not sure how many calories you burn in a day, a rough starting point is to multiply your body weight in pounds by 15 for moderate activity levels, then add 300 to 500 on top of that. Track your weight over two to three weeks. If you’re gaining more than about a pound per week, you’re likely eating too much. If the scale isn’t moving at all, bump calories up slightly.
Best Protein Sources for Muscle
Not all protein is created equal when it comes to building muscle. Animal proteins tend to be more concentrated and contain the full spectrum of essential amino acids your body can’t make on its own. Here are some of the most efficient options:
- Chicken breast: 26.7 g protein per 3-ounce serving, plus B vitamins that support energy metabolism
- Turkey breast: 26 g protein per 3-ounce serving, with almost no fat
- Eggs: high-quality protein rich in leucine, omega-3s, and vitamin D
- Salmon: 17 g protein per 3-ounce serving, plus 1.5 g of omega-3 fatty acids
- Tuna: 20 g protein per 3-ounce serving, with B12 and omega-3s
- Lean beef: packed with protein, B vitamins, minerals, and naturally occurring creatine
- Cottage cheese: 28 g protein per cup (low fat), loaded with leucine
- Shrimp: 19 g protein per 3-ounce serving with minimal fat
- Tilapia: 23 g protein per fillet, with B12 and selenium
- Scallops: 17 g protein per 3-ounce serving and fewer than 100 calories
If you’re eating two chicken breasts, a few eggs, a cup of cottage cheese, and a serving of fish in a day, you’re already well within the protein range for someone weighing 150 to 180 pounds. The key is consistency across the week, not perfection at every meal.
Plant-Based Options That Work
You can absolutely build muscle on a plant-based or plant-heavy diet, but it takes more planning. Most plant proteins are lower in one or more essential amino acids compared to animal sources, so variety matters. Combining different plant proteins throughout the day fills in the gaps.
The strongest plant-based options include soybeans (16 g protein per half cup cooked), edamame (18 g per cup with 8 g of fiber), and beans like black, pinto, or kidney varieties (about 15 g per cup cooked). Chickpeas provide 15 g of protein per cup along with 45 g of carbohydrates, making them a useful two-in-one food for both protein and energy. Firm tofu delivers around 1,744 mg of leucine per half cup, and pumpkin seeds and roasted peanuts are both surprisingly leucine-rich snack options.
Quinoa stands out among grains because it provides 8 g of protein per cooked cup alongside 40 g of carbs and a good dose of magnesium and phosphorus. It works well as a base for meals that combine multiple protein sources.
Why Carbohydrates Matter for Muscle
Protein gets all the attention, but carbohydrates are the fuel that powers your training. Your muscles store carbohydrates as glycogen, and those stores deplete during hard workouts. Research shows that eating about 7 grams of carbohydrates per kilogram of body weight fully restores muscle glycogen within 24 hours after exhaustive exercise. Lower intakes (around 5 g/kg) only replenish about 80% of those stores, which can leave you feeling flat in your next session.
For a 180-pound person, 7 g/kg translates to roughly 570 grams of carbs on heavy training days. That’s a lot. You likely don’t need the full glycogen-repletion dose unless you’re training at very high volumes, but chronically undereating carbs will hurt your performance and, by extension, your muscle gains. Good sources include rice, oats, potatoes, sweet potatoes, bread, fruits, beans, and quinoa. Prioritize carbohydrates around your training window: a solid meal one to two hours before lifting and another carb-rich meal afterward.
Fats and Micronutrients
Dietary fat supports hormone production, including testosterone, which plays a direct role in muscle growth. You don’t need to go overboard, but keeping fat at around 25 to 35 percent of your total calories is a reasonable range. Focus on sources that pull double duty: salmon and other fatty fish give you both protein and omega-3s, while nuts, seeds, avocados, and olive oil provide calorie-dense options that make hitting a surplus easier.
A few micronutrients deserve attention. Vitamin D plays a role in muscle function and repair, and many people are deficient, especially in winter months. Eggs, fatty fish, and fortified dairy products all contribute vitamin D. Magnesium and zinc, found in beef, beans, pumpkin seeds, and dark leafy greens, support the biochemical processes your body uses to synthesize new protein. You don’t need supplements if your diet includes a wide variety of whole foods, but a narrow or repetitive diet can leave gaps.
Putting It All Together
A practical day of eating for muscle gain might look like this for someone around 170 pounds: three to four meals, each containing 30 to 45 grams of protein, built around a base of carbohydrates like rice, oats, or potatoes, with added vegetables and a source of healthy fat. That structure naturally lands you in the 1.6 to 2.2 g/kg protein range, provides enough carbs to fuel training, and delivers the caloric surplus you need without overthinking it.
Consistency matters more than optimization. Eating 1.6 g/kg of protein every single day for months will produce far better results than sporadically hitting 2.5 g/kg. The same goes for your caloric surplus. Small, steady overfeeding builds muscle. Large, inconsistent overfeeding builds fat. Pick protein sources you actually enjoy, pair them with carbs and vegetables, eat a little more than you think you need, and train hard. The food choices above give you the building blocks. The repetition is what turns them into muscle.