Protein is one of the three major macronutrients the body needs, along with carbohydrates and fat. It plays an important role in maintaining and repairing tissues, supporting muscles and helping the body perform many essential functions.
Protein has also become a major topic in nutrition and fitness. Grocery stores now offer a wide range of high-protein foods, drinks and snacks, while many people are trying to increase their protein intake.
But more protein is not automatically better for everyone.
The amount you need depends on factors such as age, body size, activity level and overall health.
Why Does Your Body Need Protein?
Protein is made up of amino acids, which the body uses to build and maintain tissues.
Muscles contain a significant amount of protein, but protein is also involved in many other processes throughout the body.
Getting enough protein as part of a balanced diet can help support normal growth and maintenance.
For people who exercise regularly, protein is particularly relevant because physical activity places demands on muscles.
How Much Protein Do Adults Need?
Protein requirements vary from person to person.
For healthy adults, the Recommended Dietary Allowance is generally 0.8 grams of protein per kilogram of body weight per day.
For example, a person weighing 70 kilograms would need approximately 56 grams of protein per day based on that baseline recommendation.
However, this number is not necessarily a personalized target for every individual.
People who are very physically active, older adults, pregnant women and people with certain health conditions may have different nutritional needs.
People Who Exercise May Need More
Regular exercise can increase the importance of adequate protein intake.
Resistance training, running and other forms of physical activity can place additional demands on the body.
Athletes and people who train intensely may require more protein than the general minimum recommendation.
The International Society of Sports Nutrition notes that exercising individuals often benefit from higher protein intake than the standard RDA, depending on their training and goals.
However, increasing protein should still be part of an overall balanced diet.
You Don’t Need Protein Supplements to Get Enough Protein
Protein powders and shakes are popular, but they are not essential for everyone.
Many common foods provide protein, including:
- Eggs
- Chicken
- Fish
- Turkey
- Milk
- Yogurt
- Cottage cheese
- Beans
- Lentils
- Tofu
- Nuts and seeds
A person who eats a varied diet can often get substantial amounts of protein from regular foods.
Supplements can be convenient, particularly for people with busy schedules or higher protein requirements, but convenience is different from necessity.
Animal-Based Protein Sources
Meat, poultry, fish, eggs and dairy products can provide complete proteins containing all of the essential amino acids the body needs.
Lean poultry, fish, eggs and lower-fat dairy products can fit into a balanced eating pattern.
Fish and seafood can also provide other nutrients, depending on the type.
However, choosing protein foods should not mean ignoring vegetables, whole grains, fruits and healthy fats.
The overall quality of the diet still matters.
Plant-Based Protein Sources
You do not need to eat meat to get protein.
Beans, lentils, peas, chickpeas, soy foods, nuts and seeds can all contribute protein to the diet.
Plant-based protein sources can also provide fiber and other nutrients.
Combining different plant foods throughout the day can help provide a wide range of amino acids.
Foods such as beans and whole grains can be particularly useful combinations in many meals.
Spread Protein Throughout the Day
Some people consume very little protein at breakfast and lunch and then eat a large amount at dinner.
Instead, spreading protein across meals can be a practical approach.
For example, breakfast could include eggs or Greek yogurt, lunch could include beans or chicken, and dinner could include fish, tofu or another protein source.
Snacks such as yogurt, nuts or a small serving of cottage cheese can also contribute protein.
The exact meal pattern is less important than meeting your overall nutritional needs.
Protein Can Help Make Meals More Satisfying
Protein is often included in meals because it can help people feel satisfied.
A breakfast containing eggs and whole-grain toast, for example, may be more filling for some people than a meal consisting primarily of refined carbohydrates.
However, protein should not be viewed as a magic weight-loss food.
Weight management depends on overall calorie intake, food quality, physical activity and many other factors.
Be Careful With High-Protein Processed Foods
The words “high protein” on a package do not automatically mean that a product is healthy.
Protein bars, cereals, cookies and ready-to-drink shakes can vary significantly in their amounts of added sugar, saturated fat, sodium and calories.
Read the Nutrition Facts label before assuming a product is a healthy choice.
A simple food such as Greek yogurt, eggs, beans or nuts may sometimes provide protein with fewer unnecessary ingredients.
Older Adults May Need Special Attention
Protein becomes particularly important as people age because maintaining muscle mass and strength becomes increasingly important.
Older adults can experience age-related loss of muscle mass, and adequate protein combined with appropriate physical activity can be part of maintaining physical function.
However, individual needs vary.
Older adults with kidney disease or other medical conditions should discuss dietary changes with a healthcare professional rather than dramatically increasing protein intake on their own.
What About Protein and Weight Loss?
High-protein diets are often promoted for weight loss.
Protein can be useful as part of a weight-management plan because protein-rich foods can be filling and can help support muscle while someone is losing weight.
But simply increasing protein without considering total food intake will not automatically cause weight loss.
A balanced approach that includes vegetables, fruits, whole grains, healthy fats and appropriate portions is generally more sustainable.
Don’t Forget About the Rest of Your Diet
Protein is important, but it is only one part of nutrition.
A healthy eating pattern also needs carbohydrates, fats, vitamins, minerals, fiber and adequate fluids.
For example, a meal containing grilled chicken but no vegetables or whole grains may provide protein but still lack variety.
A more balanced plate might include protein, vegetables, a whole grain and a healthy fat source.
When Should You Talk to a Healthcare Professional?
Most healthy people can obtain protein through a balanced diet.
However, people with kidney disease, liver disease or other medical conditions may have specific dietary requirements.
Pregnant or breastfeeding women, older adults with health concerns and people following specialized diets may also benefit from individualized nutritional advice.
If you are considering a major change to your diet, talk with a qualified healthcare professional or registered dietitian.