How much protein do you need per day? The official minimum for most healthy adults is 0.8 grams per kilogram of body weight (about 0.36 grams per pound), which works out to roughly 55 to 65 grams a day for many people. Needs can be higher for older adults, people who lift weights or train hard, and those recovering from illness, and a registered dietitian can tailor the target to you.
That 0.8 g/kg figure is the Recommended Dietary Allowance (RDA), which is designed to prevent deficiency in nearly all healthy people, not to maximize muscle or performance. Below you will find how to calculate your number, how needs change by goal and age, where to find protein, and what to know about safety.
Key Takeaways
- The RDA is 0.8 g of protein per kg of body weight daily for healthy adults, a minimum, not an ideal.
- Many experts suggest around 1.0 to 1.2 g/kg for older adults, and roughly 1.2 to 2.0 g/kg for people doing regular resistance or endurance training.
- Spreading protein across meals may help muscle maintenance better than eating most of it at dinner.
- Most Americans already get enough overall; quality sources and total diet matter more than powders.
- People with kidney disease or certain other conditions may need to limit protein and should follow medical advice.
The basic math
To find your baseline, convert your weight to kilograms (pounds divided by 2.2) and multiply by 0.8.
Example: a person who weighs 165 pounds is about 75 kg. At 0.8 g/kg, the RDA is about 60 grams per day. At 1.2 g/kg, it would be about 90 grams. These are illustrative calculations, not personal prescriptions.
The Dietary Guidelines for Americans also describe an acceptable range of 10 to 35 percent of daily calories from protein. On a 2,000-calorie diet, that equals 50 to 175 grams. Because the range is so wide, the gram-per-kilogram method is more practical for most people.
Protein needs by situation
| Group or goal | Commonly discussed range (g/kg per day) | Notes |
|---|---|---|
| Healthy adults, sedentary | 0.8 | The RDA; a floor for most people |
| Adults over about 65 | 1.0 to 1.2 | Helps offset age-related muscle loss when paired with strength training |
| Regular strength training | 1.2 to 2.0 | Higher end for people building muscle or in a calorie deficit |
| Endurance athletes | 1.2 to 1.6 | Depends on training volume |
| Pregnancy (second and third trimesters) | About 1.1, or roughly 70 to 75 g/day for many | Follow your obstetric provider’s advice |
| Breastfeeding | About 1.3, or roughly 70 g/day | Ask your provider |
| Weight loss with preserved muscle | 1.2 to 1.6 | Often suggested; individualize |
Ranges for athletes and older adults come from position statements by sports nutrition and geriatric nutrition groups and are not official RDAs. They are reasonable starting points to discuss with a clinician or dietitian, not strict rules.
Why protein matters
Protein supplies amino acids that your body uses to build and repair muscle, enzymes, hormones and immune cells. Nine of those amino acids are “essential,” which means you must get them from food.
It also helps you feel full. Compared with refined carbohydrates, a protein-rich meal tends to curb hunger for longer, which is one reason higher-protein diets are popular for weight management.
Complete vs. incomplete proteins
Animal foods such as meat, fish, eggs and dairy contain all essential amino acids in good proportions. Most plant foods have lower levels of one or more, such as lysine in grains or methionine in legumes. The old advice to combine them at each meal is no longer considered necessary. Eating a variety of plant proteins across the day, such as beans, lentils, whole grains, nuts and soy, generally covers amino acid needs. Soy, quinoa and buckwheat are plant foods that are closer to complete.
Vegetarians and vegans may need slightly more total protein because plant proteins can be a bit less digestible, though the difference is small for most people eating a balanced diet.
Protein content of common foods
The numbers below are approximate; labels and cooking methods change them.
| Food | Typical serving | Approx. protein (g) |
|---|---|---|
| Chicken breast, cooked | 3 oz | 25 to 27 |
| Salmon, cooked | 3 oz | 20 to 22 |
| Egg | 1 large | 6 |
| Greek yogurt, plain | 3/4 cup | 15 to 20 |
| Cottage cheese | 1/2 cup | 12 to 14 |
| Tofu, firm | 1/2 cup | 10 to 20, varies by brand |
| Lentils, cooked | 1/2 cup | 9 |
| Black beans, cooked | 1/2 cup | 7 to 8 |
| Peanut butter | 2 tbsp | 7 to 8 |
| Almonds | 1 oz | 6 |
| Milk | 1 cup | 8 |
Need breakfast inspiration? Our list of high protein breakfast ideas shows how to start the day with 20 to 30 grams without much effort.
Timing and distribution
Many Americans eat little protein at breakfast, a modest amount at lunch, and a large portion at dinner. Research on muscle protein synthesis suggests that spreading intake more evenly, for instance 20 to 30 grams per meal for adults, may be more effective for muscle maintenance, especially in older adults. The effect is modest, and total daily intake still matters most.
For people who lift weights, having protein within a few hours before or after a workout is reasonable, but the “anabolic window” is wider than gym lore suggests. There is no need to rush a shake the second you finish.
A sample day at about 90 grams
- Breakfast: two eggs and a cup of plain Greek yogurt with berries (about 25 g)
- Lunch: lentil soup with whole-grain bread and a side salad (about 20 g)
- Snack: a small handful of almonds and a cheese stick (about 12 g)
- Dinner: 4 ounces of grilled salmon, brown rice and vegetables (about 30 g)
That totals roughly 87 grams, with no powders needed. This is an illustrative menu; portions and products vary.
Do you need protein powder?
Usually no. Whole foods provide protein along with fiber, vitamins and minerals. Powders and bars can be convenient for people with high needs, small appetites or busy schedules, but they are supplements that the FDA does not review for effectiveness before sale. Some products have been found to contain more sugar than expected or traces of heavy metals, so choose those tested by an independent third-party program, and read labels for added sugars.
Can you eat too much protein?
For healthy people, intakes up to about 2 g/kg appear safe in the short to medium term, and the Institute of Medicine’s acceptable range goes up to 35 percent of calories. Eating much more has not been shown to offer extra benefit, and it can crowd out fiber-rich foods and add extra cost.
Some groups should be careful. People with chronic kidney disease are often advised to limit protein, and those with liver disease or certain metabolic disorders may have special requirements. If you have any of these conditions, follow your care team’s guidance rather than online targets. The same applies to anyone considering very high-protein diets for weight loss, which should be supervised.
Also be cautious with diets heavy in red and processed meat, which are linked with higher risks of some chronic diseases in large observational studies. Mixing in fish, poultry, legumes and dairy broadens nutrients.
Signs you may not be getting enough
Real protein deficiency is uncommon in the U.S., but intake can fall short in older adults, people on restrictive diets, and those with poor appetite or illness. Possible clues include muscle loss, weakness, slow wound healing, brittle hair or nails, swelling and frequent infections. These signs can have other causes, so see a clinician rather than self-treating. If hair thinning is your main worry, see hair fall control tips that work.
Protein and weight management
When you cut calories, you lose both fat and some muscle. Eating adequate protein and doing resistance exercise help preserve lean mass. This does not mean extreme intake; a moderate, steady approach fits most people. Our guide on losing belly fat without crash dieting expands on sustainable habits.
Protein on a budget
Protein does not have to be expensive. Dried beans and lentils, eggs, canned tuna or sardines, peanut butter, plain yogurt, tofu and milk usually cost far less per gram of protein than premium cuts of meat or packaged protein snacks. Buying chicken thighs or whole chickens, choosing store brands, and cooking large batches of bean dishes also helps. If cost is a barrier to getting enough food in general, community food programs and benefits such as SNAP may be options; check with your state or local agency for eligibility.
Special considerations by life stage
Teens and young adults
Growing bodies need enough protein but typically get it from regular meals. Teen athletes should focus on balanced diets and adequate calories before reaching for supplements, and a pediatrician or sports dietitian can advise.
Pregnancy and breastfeeding
Needs rise to support the baby and milk production. Choose a mix of fish low in mercury, eggs, dairy, legumes and poultry, and follow your provider’s guidance on foods to avoid.
Older adults
Appetite often declines with age, making it harder to get enough. Small, protein-rich snacks such as yogurt, cheese, eggs or nut butter on toast can help. Resistance training twice a week, if your clinician approves, makes the protein work harder for muscle.
Reading nutrition labels
The Nutrition Facts panel lists grams of protein per serving, so check the serving size before doing the math. A “high protein” claim on the front of a package is not tightly standardized for every product, and some bars with large protein numbers also contain a lot of added sugar or saturated fat. Compare the protein per serving to calories, sugar and sodium to judge whether a product suits you.
Frequently Asked Questions
How much protein do I need per day to build muscle?
Sports nutrition groups commonly suggest about 1.4 to 2.0 g/kg, along with resistance training. Individual needs vary.
How much protein per meal is best?
About 20 to 30 grams per meal is a common target for adults, though you do not need to track precisely.
Is 100 grams of protein a day too much?
Not for most healthy adults, especially larger or more active people. Check with a clinician if you have kidney disease.
Do older adults need more protein?
Many experts recommend 1.0 to 1.2 g/kg or more, combined with strength training, to help maintain muscle.
Is plant protein as good as animal protein?
Yes, when you eat a variety and enough total protein. Plant sources also add fiber.
Does protein damage the kidneys?
In healthy people, moderate to high protein has not been shown to harm kidneys, but people with kidney disease should follow medical advice.
Can I get enough protein on a vegetarian diet?
Yes, with eggs, dairy, beans, lentils, tofu, nuts and whole grains.
Should kids and teens count protein?
Generally no. Offer balanced meals; needs per kilogram are higher in growth years, so ask a pediatrician if you have concerns.
Bottom Line
So, how much protein do you need per day? Start with 0.8 g/kg as the minimum, move toward 1.0 to 1.2 g/kg if you are older, and toward 1.2 to 2.0 g/kg if you train regularly. Build your intake from a variety of whole foods spread over the day, and talk to a professional if you have kidney disease or other medical conditions.
This article is for general informational purposes only and does not constitute medical, legal, or financial advice. Coverage rules, costs and guidelines change and vary by plan and state — consult a licensed healthcare professional or your insurer for guidance specific to your situation.
