How Much Protein Do You Need per Day? A Practical Guide

The Short Answer, and Why It Depends

If you lift weights, are trying to lose fat, or simply want to stay strong as you age, you probably need more protein than the official minimum. Most active adults do well on about 1.6 grams per kilogram of body weight per day (around 0.7 grams per pound), and going up to 2.2 g/kg is safe and useful in some situations. Here is where those numbers come from, how to adjust them for your goal, and how to reach them without living on shakes.

The RDA is a minimum, not a target

The Recommended Dietary Allowance for protein is 0.8 g per kilogram of body weight per day. That number was set to prevent deficiency in nearly all healthy, sedentary adults. It was never meant to describe the amount that best supports building muscle, keeping muscle during a diet, or recovering from hard training. For a 75 kg person it is 60 grams a day, which many people reach without trying.

How much protein for building muscle

A widely cited 2018 meta-analysis of resistance training studies (Morton and colleagues, published in the British Journal of Sports Medicine) found that the benefit of extra protein for muscle gain levels off at about 1.6 g/kg per day, with some people benefiting up to about 2.2 g/kg. That is why 1.6 g/kg is a sensible floor and 2.2 g/kg a sensible ceiling for most lifters.

What that looks like per day, from 1.6 g/kg up to 2.2 g/kg:

• 55 kg (121 lb): 88 to 121 grams
• 70 kg (154 lb): 112 to 154 grams
• 85 kg (187 lb): 136 to 187 grams
• 100 kg (220 lb): 160 to 220 grams

How much protein for fat loss

Protein matters even more when you are eating less. In a calorie deficit your body is more willing to break down muscle for energy, and a higher protein intake, combined with strength training, is one of the best ways to prevent that. Protein also keeps you fuller than the same calories from carbohydrate or fat, and your body spends more energy digesting it. Aim for the upper half of the range, roughly 1.8 to 2.2 g/kg, during a diet.

If you have a lot of weight to lose, calculating from your current weight gives an unrealistically large number. Use your goal weight, or a weight that is reasonable for your height, instead.

How much protein as you get older

Muscle responds less strongly to protein as we age, a change sometimes called anabolic resistance. Many researchers now suggest that adults over about 65 aim for at least 1.0 to 1.2 g/kg per day, and more if they are strength training, along with lifting to keep the muscle they have. If you have kidney disease, talk to your doctor before raising protein; for healthy kidneys, these intakes have not been shown to cause harm.

Does timing matter?

The total for the day matters most. After that, spreading protein across the day helps a little: three or four meals with roughly 0.4 g/kg each (about 25 to 40 grams for most people) works better than one huge protein dinner. Eating some protein in the hours around your workout is a sensible habit, but the old idea of a 30-minute "anabolic window" is much looser than once thought.

Easy ways to hit your number

Most people who fall short do so at breakfast and with snacks. A few practical swaps:

• Breakfast: eggs with egg whites, Greek yogurt with fruit, cottage cheese, or oats made with milk and a scoop of protein powder.
• Lunch and dinner: build the plate around a palm-sized or larger portion of chicken, fish, lean meat, tofu, tempeh or legumes, then add the rest.
• Snacks: skyr or Greek yogurt, jerky, cheese, edamame, a glass of milk, or a protein bar with a short ingredient list.
• Plant-based: combine sources (legumes plus grains, soy, seitan) and aim a little higher, since some plant proteins are digested less completely.

Protein powder is just food in a convenient form. It is not required, but it makes the higher targets far easier to reach.

How to know if you are getting enough

You cannot judge protein by feel. People who believe they eat "lots of protein" often land well under 1.2 g/kg when they actually log a week of meals. The only reliable check is to track your food for a few days and look at the total. If you are new to logging, read how to count calories accurately first, since the same mistakes affect protein too.

Track protein next to your training

CaloDash shows your daily protein, carbs and fat as you log meals, recipes and scanned foods, alongside the workouts and body measurements that the protein is supposed to support. Pair your target with a plan from our guide to progressive overload, or use it as the nutrition half of a body recomposition. Create a free account to start.