Building muscle requires eating enough total calories to support growth, with a strong emphasis on protein spread across multiple meals. The formula is straightforward: a modest calorie surplus of 5 to 20% above your maintenance level, 1.4 to 2.0 grams of protein per kilogram of body weight each day, and enough carbohydrates to fuel your training. The details of how you distribute those nutrients matter more than most people realize.
How Many Extra Calories You Need
Your body can’t build new tissue without extra energy, but the surplus doesn’t need to be dramatic. A calorie surplus of 5 to 20% above your maintenance intake is the sweet spot for gaining muscle while keeping fat gain minimal. For someone who normally eats 2,000 calories a day, that’s an extra 100 to 400 calories, roughly the equivalent of a banana with a tablespoon of peanut butter on the low end, or an extra small meal on the high end.
Starting at the lower end of that range is smart. If you jump straight to a 20% surplus, you’ll gain weight faster, but more of it will be fat. A conservative approach lets you monitor progress over a few weeks. If the scale isn’t moving and your lifts are stalling, nudge calories up by 100 to 200 per day. This incremental strategy helps you find the minimum effective surplus for your body, which varies based on training experience, genetics, and how much muscle you’ve already built. Beginners can gain muscle on smaller surpluses (or even at maintenance) more easily than advanced lifters.
How Much Protein You Actually Need
The International Society of Sports Nutrition recommends 1.4 to 2.0 grams of protein per kilogram of body weight per day for people looking to build or maintain muscle. For a 75 kg (165 lb) person, that works out to roughly 105 to 150 grams daily. Mayo Clinic guidelines are slightly more conservative, placing the range at 1.2 to 1.7 grams per kilogram for people who regularly lift weights.
There’s no strong evidence that going beyond 2.0 g/kg provides additional muscle-building benefits for most people, though some research suggests intakes above 3.0 g/kg may help resistance-trained individuals lose fat. For the vast majority of lifters, landing somewhere in the 1.6 to 2.0 g/kg range covers the bases without requiring you to choke down protein at every waking moment.
To put this in food terms: a chicken breast has about 30 grams of protein, a cup of Greek yogurt has 15 to 20 grams, two eggs have about 12 grams, and a scoop of most protein powders delivers 20 to 30 grams. A 75 kg person aiming for 150 grams could hit that target with three solid meals plus one protein-rich snack.
Why Protein Per Meal Matters
Total daily protein is the biggest lever, but how you distribute it across meals makes a measurable difference. Research on lean mass and strength found that people who ate at least two meals per day containing 30 grams or more of protein had significantly greater leg lean mass and leg strength compared to those who didn’t hit that threshold at any meal. The benefit plateaued at around 45 grams per meal, meaning there’s a ceiling to how much your muscles can use from a single sitting.
This is where the concept of a “leucine threshold” comes in. Leucine is a specific amino acid that acts as the trigger signal telling your muscles to start building new protein. You need roughly 2 to 3 grams of leucine per meal to flip that switch effectively. Most animal-based protein sources hit that mark naturally at 30 grams of total protein. A 30-gram serving of protein from beef, for instance, has been shown to maximally stimulate muscle building, with higher servings producing no additional benefit in that meal window.
The practical takeaway: aim for three to four meals a day, each containing 30 to 45 grams of protein, rather than eating a small amount at breakfast and cramming it all into dinner. Spacing protein feedings about three to four hours apart gives your muscles repeated opportunities to activate that building process throughout the day.
Carbohydrates Are Not Optional
Protein gets most of the attention, but carbohydrates are the fuel that powers your training sessions. Without adequate carbs, your body draws on protein for energy instead of using it to repair and grow muscle tissue. General guidelines from both the NSCA and the ISSN recommend 5 to 8 grams of carbohydrates per kilogram of body weight per day for active individuals and athletes. For a 75 kg person, that’s 375 to 600 grams per day.
That range is broad because carb needs vary with training volume. Someone doing three 45-minute lifting sessions a week needs less than someone lifting five days a week and adding cardio. Most recreational lifters doing hypertrophy-focused training will land comfortably at the lower end of that range. Prioritize carbs around your workouts: a carb-rich meal one to two hours before training ensures you have energy to push hard, and carbs after training help replenish glycogen stores in your muscles.
Good sources include rice, oats, potatoes, bread, pasta, fruit, and beans. These aren’t just calorie fillers. They directly support workout performance, and better performance in the gym is what drives muscle growth over time.
What to Eat After Training
Post-workout nutrition doesn’t need to be complicated. A combination of protein and carbohydrates after training supports muscle repair and restores energy reserves. Aim for 20 to 40 grams of protein within a couple hours of finishing your workout, paired with a solid serving of carbohydrates. A chicken and rice bowl, a protein shake with a banana, or eggs on toast all work fine.
The old idea that you need to eat within a 30-minute “anabolic window” or lose your gains has been largely overstated. What matters more is your total intake across the day and whether you’re hitting your protein targets at each meal. That said, if you trained fasted or it’s been several hours since your last meal, eating sooner rather than later does make a practical difference.
Plant-Based Protein Works With a Few Adjustments
If you eat a plant-based diet, you can build muscle just as effectively as someone eating animal protein, but you’ll need to be more deliberate about your choices. Plant-based protein sources tend to contain fewer branched-chain amino acids, including leucine, per serving compared to whey or animal proteins. This means a single source like rice protein alone may not hit the leucine threshold needed to fully stimulate muscle building.
The fix is simple: combine protein sources. A blend of pea and rice protein, for example, creates a more complete amino acid profile. Studies have shown that plant-based and whey protein powders are equally effective at promoting muscle growth when they contain similar amounts of total protein and essential amino acids per serving. Look for plant-based protein powders or meals that deliver at least 20 to 30 grams of protein with 1 to 3 grams of leucine per serving. Soy, in particular, has a strong leucine profile among plant proteins.
Whole food sources like lentils, chickpeas, tofu, tempeh, edamame, and seitan can all contribute meaningfully to your daily protein total. The challenge is volume: you’ll often need to eat larger portions to match the protein density of meat or dairy. Planning meals in advance helps ensure you don’t fall short.
Dietary Fat and Overall Balance
Fat often gets overlooked in muscle-building conversations, but it plays a role in hormone production, including testosterone, and helps your body absorb certain vitamins. There’s no special fat target for hypertrophy, but keeping fat at around 20 to 35% of total calories is a reasonable range. Once you’ve set your protein and carbohydrate targets, fat fills in the remaining calories.
Focus on sources like olive oil, nuts, avocados, fatty fish, and eggs. Extremely low-fat diets can interfere with hormone levels, so cutting fat below 15 to 20% of total calories for extended periods isn’t ideal when you’re trying to build muscle.
Creatine: The One Supplement Worth Considering
Creatine monohydrate is the most well-researched supplement for muscle growth and strength. It works by increasing the amount of quick energy available to your muscles during short, intense efforts like lifting weights, allowing you to squeeze out extra reps over time. That additional training volume adds up.
Harvard Health recommends a straightforward dose of 3 to 5 grams per day. Older protocols suggested a “loading phase” of higher doses for the first week, but current evidence shows this offers no real advantage and simply puts more stress on your kidneys. Just take 3 to 5 grams daily, with or without food, at whatever time is convenient. Results become noticeable after a few weeks of consistent use.
Putting It All Together
A practical day of eating for muscle growth for a 75 kg person might look like this: three main meals and one snack, each main meal containing 30 to 40 grams of protein alongside a generous portion of carbohydrates and some fat. Total daily intake lands around 130 to 150 grams of protein, 400 to 500 grams of carbohydrates, and enough fat to bring total calories to about 5 to 15% above maintenance. Add 3 to 5 grams of creatine at some point during the day.
Consistency matters far more than perfection. Missing your protein target by 10 grams on a Tuesday won’t derail your progress. But chronically undereating protein, skipping meals, or failing to eat enough total calories will. Track your intake for a week or two to calibrate your intuition, then adjust based on what the mirror, the scale, and your training logs tell you over the following months.