The Short Answer
Most people need between 1.2 and 2.0 grams of per kilogram of body weight each day. The exact amount depends on your goals, activity level, and age. If you weigh 70 kg, that means roughly 84 to 140 grams of protein per day.
The old recommendation of 0.8 grams per kilogram is the bare minimum to avoid deficiency — not the amount needed to thrive. Modern research consistently shows that most active adults benefit from significantly more protein than that baseline suggests.
Why Protein Matters
Protein is not just for bodybuilders. It is one of the three your body relies on every single day, and it plays a role in nearly everything:
- Builds and repairs muscle: Every time you exercise, you create small tears in your muscle fibers. Protein provides the amino acids your body needs to repair and strengthen those fibers.
- Keeps you full: Protein is the most satiating macronutrient. Eating enough protein at each meal helps control appetite and reduces cravings, making it easier to stick to your nutrition plan.
- Supports bones and immune system: Protein is a key building block for bones, skin, cartilage, and immune cells. It is not just about muscles.
- Preserves muscle during weight loss: When you eat in a , your body can break down muscle for energy. Higher protein intake helps protect your muscle mass so you lose fat instead.
How Much for Different Goals
Your ideal protein intake depends on what you are trying to achieve. Here are the evidence-based ranges:
- General health: 1.2–1.6 g/kg. If you are moderately active and just want to stay healthy, this range covers your needs well. It supports everyday recovery, keeps you full, and maintains muscle.
- Muscle gain: 1.6–2.2 g/kg. If you are strength training and trying to build muscle, you need more protein to fuel that growth. Research shows diminishing returns above 2.2 g/kg for most people.
- Weight loss: 1.8–2.4 g/kg. This might seem counterintuitive — more protein when eating less food. But higher protein intake during a calorie deficit is crucial for preserving muscle mass and staying satisfied.
- Over 50: at least 1.2 g/kg. Muscle loss accelerates with age, a process called sarcopenia. Older adults need more protein per meal to trigger the same muscle-building response as younger people. Staying above 1.2 g/kg is the minimum; closer to 1.6 g/kg is even better.
Good Protein Sources
You do not need expensive supplements to hit your protein targets. Here are some of the best whole-food sources:
- Chicken breast: About 31 g of protein per 100 g. Lean, versatile, and widely available.
- Fish: Salmon, tuna, and cod provide 20 to 25 g per 100 g, plus healthy omega-3 fats.
- Eggs: About 6 g per egg. A complete protein source that is cheap and easy to prepare.
- Greek yogurt: Around 10 g per 100 g. Great for snacks and breakfast.
- Tofu and tempeh: 8 to 19 g per 100 g. Excellent plant-based options.
- Beans and lentils: 7 to 9 g per 100 g (cooked). High in fiber too.
- Protein powder: 20 to 30 g per scoop. Convenient when you need a quick boost, but whole foods should come first.
Timing: Does it Matter?
Yes, but not as much as total daily intake. The most important thing is hitting your protein target for the day. That said, research shows that spreading your protein across meals is more effective than eating it all at once.
Aim for 25 to 40 grams of protein per meal, spread across three to four meals throughout the day. This approach maximizes muscle protein synthesis — the process your body uses to build and repair muscle tissue. Eating 100 grams of protein in a single meal is less effective than splitting it across four meals of 25 grams each.
If you exercise, having a protein-rich meal within a couple of hours after your workout is helpful, but it is not the make-or-break factor some people believe. Consistency over the full day matters far more than any single meal.
Common Myths Debunked
Does too much protein damage your kidneys?
This is one of the most persistent nutrition myths. In healthy people with normal kidney function, there is no evidence that a high-protein diet causes kidney damage. This concern comes from studies on people who already had pre-existing kidney disease, where extra protein can put additional strain on compromised kidneys.
If you have healthy kidneys, eating 1.6 to 2.2 grams per kilogram of body weight is well within the range that research considers safe.
Do you need protein immediately after a workout?
The "anabolic window" — the idea that you must consume protein within 30 minutes of exercising or lose your gains — has been largely debunked. While post-workout nutrition is helpful, your body can effectively use protein consumed within several hours before or after training. Focus on your total daily intake first.
Try the Calculator
Not sure how much protein you need based on your weight and goals? Use our free Protein Calculator to get a personalized recommendation in seconds. You can also use the Macro Calculator to figure out your full and how to split your calories across protein, carbs, and fat for your specific goal.
Getting enough protein does not have to be complicated. Pick a target, plan your meals around good protein sources, and spread it throughout the day. Your body will thank you.