How Much Protein Do I Need? A variety of protein-rich foods to meet daily recommended protein intake

How Much Protein Do I Need? Discover Your Daily Recommended Protein Intake

While this represents a good starting point, calculating your ideal daily recommended protein intake involves exploring some other key factors as well.

Key Point: While calculating a body weight-to-protein intake is a good place to start, athletes and fitness enthusiasts will want to take a closer look at other key calculations as well–those involving age, activity level, and fitness goals.

What Is Protein?

Your body needs protein to repair and rebuild the muscle tissue that breaks down during training.

Protein is the building block for muscle tissue. It’s made up of even smaller building blocks called amino acids. Your body needs these amino acids to repair and rebuild the proteins found in muscle tissue that break down during prolonged, intense exercise.

There’s a reason protein is one of the three all-important macronutrients (the other two being fats and carbohydrates). It’s critical to consume enough protein, because that’s the only way muscles will grow.

Without enough protein, you may experience muscle catabolism. This is when your body breaks down muscle and uses it as an energy source—which is something we definitely want to avoid.

The guideline that you’ll commonly hear for calculating the recommended protein intake is pretty simple: 1 gram of protein per pound of body weight. For example, if you weigh 120 pounds, the general consensus is that your daily protein intake should be 120 grams.

Takeaway: While that’s a great starting point, remember that it’s only a rough starting point that largely applies to active gym-goers and athletes. There are other variables that need to be accounted for before you decide how much protein you need each day.

Activity Level

Your activity level plays a big part in how much protein you need. If your lifestyle is on the sedentary side, you won’t need as much protein as someone who’s more active.

Keep in mind that your activity level doesn’t just take into account how often you exercise or go to the gym, but also the type of work you do.

If you spend most of the day sitting at a desk in front of a computer, you’re considered to be more sedentary than those who are on their feet and moving around all day, such as landscapers and construction workers.

Your activity level plays a big part in how much protein you need.

Fitness Goals

Ideal protein intake is also dependent on your goals. When it comes to fitness, there are three basic goals that most people chase: bulking, maintaining, and cutting. Each one affects how much protein you need.

Maintenance is when you want to keep your current body weight the same. When you’re maintaining, you don’t need as much protein as when you’re cutting or bulking.

Josephine Conolly-Schoonen, MS, RD states, “During the maintenance phase, [the] recommended protein intake is 1.2 grams per kilogram body weight.” (To convert your body weight from pounds to kilograms, divide it by 2.2.)

When it comes to bulking and building muscle, protein is paramount. Without it, you won’t see the muscle growth you’re working for in the gym. If this is your goal, Conolly-Schoonen advises a protein intake of 1.4 to 1.8 grams of protein per kilogram of body weight.

Finally, there’s the cutting phase. Cutting means that you’re trying to lose fat while keeping as much muscle as possible. When you cut, you’re eating a calorie deficit, so the chance that you’ll lose muscle is higher.

“During this special phase of calorie and carbohydrate restriction, protein needs increase to 1.8 to 2.0 grams of protein per kilogram body weight,” says Conolly-Schoonen. This will help minimize muscle loss as much as possible.


It’s harder to build muscle as you get older. In fact, the main cause of sarcopenia, which refers to the gradual loss of muscle mass, is aging. Your recommended protein intake will change over time to accommodate this.

One study in the Journal of the American College of Nutrition explains, “Protein tissue accounts for 30% of whole-body protein turnover, but that rate declines to 20% or less by age 70. The result of this phenomenon is that older adults require more protein/kilogram body weight than do younger adults.”

It’s harder to build muscle as you get older.

The study suggests that the recommended protein intake should increase by up to 25% for adults over 70.

Common Sources of Protein

There are plenty of delicious and readily available sources of protein to help you reach your recommended protein intake. Here are some of the most common food sources of protein:

  • Chicken breast: For 3 ounces (85 grams) of cooked chicken breast, you get 26 grams of protein.
  • Eggs: 1 large egg contains 6 grams of protein.
  • Beans: ½ cup of cooked beans gives you 8 grams of protein.
  • Tofu: ½ cup of cooked tofu has 11 grams of protein.
  • Salmon: 4 ounces (113 grams) of cooked salmon gives you 27 grams of protein (salmon also happens to be a prime example of a superfood—check out some other superfoods to fast-track your healthy eating).

If you’re having trouble meeting your daily recommended protein intake with food, protein powder is an easy and convenient alternative. The average scoop of protein powder can get you 20 to 30 grams closer to meeting your protein requirement.

Do Men Need More Protein than Women?

In general, men are more likely to need higher protein intake than women because of their higher intake of calories. The Institute of Medicine equation confirms that men must consume higher amounts of calories than women at all age and activity levels.

The suggested amount of calorie intake is necessary to maintain energy balance.

For example, men 19-50 years should eat between 2,400 and 3,000 calories per day depending on whether they live sedentary, moderately active, or active lifestyles. Women in the same age bracket, on the other hand, should consume 2,000 to 2,200 calories per day.

In terms of protein intake, men should consume about 56 grams of protein each day, on average. Women can take about 10 grams less of protein – 46 grams per day.

Men also have more muscle mass and larger bodies than women, on average. Their daily protein intake should then be higher since protein is an essential macronutrient for muscles.

But, as previously mentioned, the actual amount of protein that you should consume in a day largely depends on your fitness goals, physical health, and activity levels.

How Much Protein Is Too Much?

There isn’t a clear answer as to how much protein is too much, though Harvard Health Publishing suggests that for the average person, 2 grams of protein per kilogram of body weight is probably overdoing it.

For 3 ounces (85 grams) of cooked chicken breast, you get 26 grams of protein.

More often than not, any problems that may arise from eating a lot of protein come from the types of food you’re eating rather than the protein itself.

For example, while red meat is a great protein source, it also increases the risk of heart disease and colon cancer according to quite a few long-term studies. However, if you vary your protein sources and follow a balanced diet, it’s unlikely you’ll eat too much protein.

It’s also important to note that if you’re not seeing the results you want, the question may not be whether you’re eating too little or too much protein; instead, it may be a question of whether your training is effective. By optimizing your workout routine, you can ensure that you’re making progress both in the gym and in the kitchen.

The question “How much protein do I need?” is one that only you can answer, depending on your lifestyle and goals.

Conclusion: In order for you to accurately determine your ideal recommended protein intake, you can either start with a rough estimate from your body weight–or seek an ideal dose based on a combination of factors: age, weight, and fitness goals.

Avatar photo

Elliot Reimers

Elliot Reimers is a NASM Certified Nutrition Coach (CNC) and M.S. candidate at Michigan State University, where he is studying Molecular Pharmacology and Toxicology. He has been a freelance science writer since 2013, centering on the topics of nutritional science, dietary supplementation, fitness, and exercise physiology. He received his B.S. in Biochemistry from the University of Minnesota and is an inveterate “science nerd” who loves fitness. He is passionate about coaching and educating people about how to live healthier, be smarter about what they put in their bodies, and perform better. In his spare time, you’re most likely to find Elliot hoisting barbells, hiking the mountains of beautiful Colorado, or working on content for Simply Shredded.