How much protein do women need to build strength?

Protein advice for women tends to come in two flavors: dainty portions, or a shake for every occasion. The research is calmer than both, and the number is not different because you are a woman.

The number

The International Society of Sports Nutrition reviewed the evidence on women who train and in 2023 recommended a daily intake of 1.4 to 2.2 grams of protein per kilo of bodyweight, at every stage: before menopause, around it, after it, and on hormonal contraception¹. It suggests the upper end in the second half of your cycle and around and after menopause¹.

For a sense of where the ceiling sits, a 2018 meta-analysis of 49 trials found that once total intake reached about 1.6 grams per kilo a day, more protein added nothing further to the lean mass people built from lifting². So a woman who weighs 65 kilos lands somewhere around 90 to 145 grams a day, and the bottom half of that already does most of the work.

Spread it out, and do not stress the timing

The 2023 position stand suggests splitting your protein into servings every three to four hours across the day¹. The society's main position stand on protein says the best time around a session is largely a matter of what suits you, because the benefit shows up whether you eat before training or after it³. Get the daily total right first. The timing is a small lever on top.

Older lifters need a little more

Muscle gets less responsive to protein with age. In the 2018 meta-analysis, the extra protein did less for muscle gains the older people were². The PROT-AGE study group recommends at least 1.0 to 1.2 grams per kilo a day for people over 65, and 1.2 or more for those who exercise⁴. If you are past menopause and lifting, aim for the top of the range above rather than the bottom¹.

Eat enough, full stop

Protein only does its job if there is enough food around it. The same 2023 position stand calls getting enough energy overall the primary nutritional priority for women who train¹. A high protein diet that is far too low in calories is not a muscle building diet.

Food first, powder if it helps

You can hit these numbers with ordinary meals. A scoop of powder is a convenience, not a requirement, and The pros and cons of protein powder goes through when one earns its place.

Eat enough protein, eat enough overall, and stop worrying about the shake.