How Much Protein Do Women Need? By Age, Weight and Goal (Chart)

Most women need more protein than the 0.8 g/kg RDA, which is a floor set to prevent deficiency (Institute of Medicine, 2005). For general health and holding onto muscle, research supports 1.2 to 1.6 grams per kilogram a day: about 80 to 110 grams for a 150-pound woman, and more if you train hard or are losing weight.

Updated 2026-10-23. Sources checked 2026-10-22. Gram targets are our arithmetic from the g/kg ranges in the sources.

That range surprises most women, because the number they've heard, 0.8 g/kg or about 46 grams a day, is far lower. Both are right. They answer different questions. The RDA answers "what's the minimum to avoid a deficiency?" The higher range answers "what supports muscle, appetite and aging well?", which is what most of you are asking.

How much protein does a woman need per day?

It's a range, because it scales with your body weight and your goal. A single gram number for every woman is misleading.

• The floor: the Recommended Dietary Allowance is 0.8 g/kg of body weight for all adults, about 46 grams a day for the reference woman. It's set to prevent deficiency in nearly everyone, not to optimize anything [1].
• The research-supported range: for keeping muscle and managing weight, higher-protein diets of 1.2 to 1.6 g/kg preserve lean mass and improve appetite control during weight loss [3]. The International Society of Sports Nutrition puts the range for building and keeping muscle at 1.4 to 2.0 g/kg [2].
• The percentage view: the Institute of Medicine's acceptable range is 10 to 35% of daily calories from protein [1]. Most women eating for health land in the upper half.

A note on the 1.2-1.6 g/kg figure, since people search for its source by PMID: it comes from Leidy and colleagues' 2015 review in the American Journal of Clinical Nutrition (PMID 25926512) [3]. That review came out of a protein summit supported by animal-protein industry groups, and the range is well corroborated elsewhere. The 1.4-2.0 g/kg range is the ISSN position stand, PMID 28642676 [2].

The gap between 0.8 and 1.2 to 1.6 is where most women fall short. It's a surprising amount of extra protein to find in a normal day, which is what the rest of this page is about.

What are women's protein needs by body weight and goal?

This is the table to bookmark. Find your weight down the side and your goal across the top. Each cell is a daily target in grams.

Calculated 2026-10-22 from the g/kg ranges in sources [1], [2], [3] and [5], rounded to the nearest gram.

The weight-loss column comes from trials in people eating less and training hard. In one, 2.4 g/kg during a steep calorie deficit produced more lean-mass gain and fat loss than 1.2 g/kg [5]. If you're not training, the general-health column is the more realistic target.

A shortcut without a calculator: multiply your weight in pounds by 0.5 to 0.7 for general health, or by 0.7 to 1.0 if you're building muscle or losing weight.

How much protein should a 150-lb or 170-pound woman eat?

Two of the most-searched specifics, worked out from the table:

• A 150-lb (68 kg) woman: about 54 g at the RDA minimum; 82 to 109 g for general health and keeping muscle; up to about 136 g if she's building muscle, or about 109 to 163 g to hold onto muscle while losing weight.
• A 170-lb (77 kg) woman: about 62 g minimum; 93 to 123 g for general health; up to about 154 g building muscle, or about 123 to 185 g in a muscle-sparing weight-loss phase.

If those upper numbers look like a lot of chicken, you're reading them correctly. They're hard to reach from three normal-sized meals, which is why so many women fall short without noticing.

What is an appropriate protein portion for a woman at each meal?

For most women, 25 to 35 grams per meal. Spreading protein across the day beats loading it at dinner, and the per-meal number matters more as you get older.

The reason is a measured effect. Older adults needed about 0.4 g/kg per meal to max out muscle protein synthesis, against about 0.24 g/kg in younger adults [4]. That study was in men, so read it as the age mechanism, not a women-only result. For a 150-pound woman, 0.4 g/kg is about 27 grams at a sitting.

Foods: USDA FoodData Central SR Legacy, FDC 171477, 173417, 171287 and 170903, checked 2026-10-22 [9]. Paleo Protein: product label, checked 2026-10-22 [10].

Does a woman's protein need change with age?

Yes. It goes up, which is the opposite of what most people assume. Two things drive it.

Anabolic resistance. As you age, muscle responds less to the same dose of protein, so you need more per meal to get the same response [4]. That's why per-meal distribution matters more after 50.

Menopause. Postmenopausal women had lower relative muscle mass and bone density than pre- and perimenopausal women of similar age and activity in a study of 1,393 women [6]. Expert guidance for adults over 65 is 1.0 to 1.2 g/kg a day, and 1.2 to 1.5 with activity or illness [7]. In practice, a woman over 50 should aim for the upper part of the general range and hit 25 to 35 grams at each meal. Resistance training is what drives the muscle result. Protein supports it.

Pregnancy raises needs too, to about 1.1 g/kg a day by the Institute of Medicine's numbers [1]. That's a conversation for you and your OB-GYN, and a general protein powder isn't a prenatal product.

The protein for women and 45+ guide brings together everything we've written for this stage.

How much protein is too much for a woman?

For healthy women, the ceiling is higher than most people think. The Institute of Medicine set no Tolerable Upper Intake Level for protein, because there wasn't evidence to define a harmful amount [1]. That's an absence of data, not a dare.

• Kidneys: a meta-analysis of 28 controlled trials found no adverse effect of higher protein on kidney function in healthy adults [8]. The "protein harms kidneys" idea comes from guidance for people who already have kidney disease, for whom protein is restricted under medical supervision [11]. If you have kidney disease, diabetes with kidney involvement, or a single kidney, set your target with your provider.
• Bones: the old belief that protein "leaches calcium" hasn't held up. Higher protein intake is associated with better bone density in older adults, not worse [12].
• A practical ceiling: staying inside 10 to 35% of calories keeps you well within safe territory. For most women, getting enough is the realistic problem.

How do you hit your protein target?

Knowing the number is easy. Reaching it is the work. Three habits do most of it:

1. Anchor every meal with protein. Aim for 25 to 35 grams: three eggs and a side of yogurt, a palm-sized portion of meat or fish, or a scoop of protein powder.
2. Fix breakfast first. Most women eat the least protein at breakfast (toast, fruit, coffee) and the most at dinner. Flipping that is the single biggest change.
3. Use a powder for the meal that keeps coming up short. Hitting 100 grams from whole food alone means a lot of cooking. A scoop adds 20 to 26 grams in one step.

If you're choosing a powder, our guide to the best protein powder for women walks through the label, and high-protein foods ranked by grams per portion covers the food-first route.

How do you know if you're getting enough protein?

Your body sends signals when protein runs short, though they're easy to blame on something else. Common signs of eating too little protein for a long stretch:

• Hair thinning or shedding more than usual. Hair is protein, and inadequate intake is a documented cause of shedding [13].
• Brittle, slow-growing nails. Nails are keratin, also protein. Our page on protein for skin, hair and nails covers what helps and what's marketing.
• Constant hunger and snacking, since protein is the most filling macronutrient [3].
• Losing strength, or taking longer to recover from activity.

None of these proves a shortfall on its own. If several ring true and your diet is light on protein, track your intake for three days against the table above. Most women who try it are surprised by the gap.

Frequently asked questions

How many grams of protein does a woman need per day?

At minimum about 0.8 g per kg of body weight, and 1.2 to 1.6 g/kg for keeping muscle and managing weight. For a 150-pound woman that's about 54 grams at the floor and 82 to 109 grams for general health.

How much protein do I need to lose weight as a woman?

To lose fat while keeping muscle, research supports about 1.6 to 2.4 g/kg a day, spread across meals, especially if you train. For a 150-pound woman that's roughly 109 to 163 grams. Higher protein also keeps you fuller in a calorie deficit.

Is 100 grams of protein a day enough for a woman?

For most women, yes. One hundred grams falls inside the 1.2 to 1.6 g/kg range for women from about 140 to 180 pounds. Very active women may want more, and smaller or less active women may need a little less.

How much protein does a woman over 50 need?

Aim for at least 1.0 to 1.2 g/kg, and often 1.2 to 1.6 g/kg, because aging muscle responds less to protein. Getting 25 to 35 grams at each meal matters as much as the daily total.

Can a woman eat too much protein?

For healthy women there's no established upper limit, and higher intakes haven't been shown to harm kidney function. Stay within 10 to 35% of calories from protein. Women with kidney disease should follow their provider's target.

How much protein should a woman eat to build muscle?

About 1.4 to 2.0 g/kg a day, paired with resistance training: roughly 95 to 136 grams for a 150-pound woman. Training does the building. Protein supplies the material.

Struggling to hit your number from food alone? Paleo Protein adds 26 g of complete protein from grass-fed beef and egg white in one scoop, about 120 calories, no dairy, with a 60-day money-back guarantee.