How Much Protein Do You Really Need Per Day?

Protein is the nutrient your body uses to repair and build muscle, and it is the one most people under-eat. The official minimum of 0.8 grams per kilogram keeps you from a deficiency, but it is far below what supports training and body composition goals. If you lift weights or train hard, you need more.

For active people, the practical target is 1.6 to 2.2 grams of protein per kilogram of bodyweight per day. This range comes from research on people doing resistance training, and within it most see no extra muscle benefit from eating more. So a person weighing 80 kilograms would aim for roughly 128 to 176 grams of protein a day.

Where you land in the range depends on your goal and your training. More serious lifters and anyone trying to add muscle should sit toward the higher end. If you are just staying active, the lower end is fine.

When you eat in a calorie deficit to lose fat, your body is more likely to break down muscle for energy. Eating plenty of protein, toward 2.0 to 2.2 g/kg, signals your body to hold on to muscle and burn fat instead. This is the single most important nutrition habit for keeping the muscle you worked to build.

Protein also keeps you fuller than carbs or fat for the same calories, which makes a deficit easier to stick to. On a cut, the higher end of the range works in your favour twice over.

You may have heard that high protein harms the kidneys. For people with healthy kidneys, the research does not support this. Intakes well above 2 g/kg have been studied without harm to kidney or liver function.

If you have an existing kidney condition, talk to your doctor about the right amount. For everyone else, there is no reason to fear eating toward the top of the range.

Your body builds muscle best when protein arrives in steady doses rather than one big hit. Aim to split your daily total across three or four meals, each delivering around 0.4 g/kg of bodyweight. For an 80 kilogram person that is about 30 to 35 grams per meal.

This matters more on training days, but the difference is modest. The total amount over the day is what counts most, so do not stress if one meal is light as long as the day adds up.

Strong protein sources include chicken, lean beef, fish, eggs, Greek yogurt, cottage cheese, milk, and for plant eaters tofu, tempeh, lentils, beans and a quality protein powder. Whole foods should do most of the work, with powder filling gaps.

Protein matters on rest days too. Muscle repair happens between sessions, not during them, so your body needs the building blocks on the days you are not training just as much. Keep your intake steady every day, then use the Protein calculator to set a target that fits your weight and goal.