Protein for Women: Menopause, Bone and Muscle

Overview

"Protein powder for women" is a common search, but the sources we read do not describe a separate kind of protein for women. What changes with life stage is the question: pregnancy and breastfeeding have their own official figures, and after menopause the concern is usually bone and muscle. This page sets out what official tables and research reviews found. It gives no personal targets; a clinician or dietitian can look at your whole picture.

What official tables say for women

Health Canada's tables (the 2005 US and Canadian Dietary Reference Intakes) list an RDA for protein by age, sex, pregnancy and breastfeeding. Protein is shown in grams per kilogram of body weight per day; the grams-per-day column uses a reference body weight. [1]

Females 19 to 30 years46

Females 51 to 70 years46

Females over 70 years46

Pregnancy, 19 to 30 years (second half only)71

Breastfeeding, 19 to 30 years71

Health Canada notes the pregnancy values apply only to the second half of pregnancy. [1] Note that this table gives the same RDA for women before and after menopause. Other countries and bodies publish different figures; see Protein Intake Levels by Age, Sex and Country. Higher figures for older adults in some position statements are covered in Protein and Sarcopenia.

Menopause and bone

The NHS explains that women are more at risk of osteoporosis than men because the hormone changes at menopause directly affect bone density. [2] After menopause, oestrogen levels fall, which can lead to a rapid decrease in bone density. [2] The NHS says weight-bearing and resistance exercise are particularly important for improving bone density and helping to prevent osteoporosis. [3]

1. Does higher protein intake help bone? (National Osteoporosis Foundation review, 2017; 16 trials and 20 cohort studies in adults) [4]

   Studies were heterogeneous and confounding could not be excluded. [4]

   Moderate evidence of a protective effect on lumbar spine bone density, but no effect on total hip, femoral neck or total body density or bone markers. [4]

2. Same question across the life course (2019 review, 127 papers)

   Included 74 correlational studies, 23 fracture studies and 30 supplement trials; pooled supplement results were not statistically significant for spine or hip density. [5]

   Little benefit of increasing protein for bone in healthy adults, and no sign of harm within the intakes studied, around 0.8 to 1.3 g/kg/day. [5]

3. Adults over 65 (2019 review, 12 cohort studies and one trial)

   Mostly cohort data. Two authors report grants from a dairy company for other studies. [6]

   Higher protein intakes were linked to fewer hip fractures in a pooled analysis of four cohort studies. [6]

So the evidence on bone is mixed to modest. Protein is one part of a bone plan that also includes calcium, vitamin D and exercise. See Protein and Bone Health and Osteoporosis and Bone Health. The 2017 review concluded current evidence shows no adverse effects of higher protein intakes on bone. [4]

Muscle after menopause

A 2022 meta-analysis of whey protein in women aged 55 and over found that, in postmenopausal women, whey only enhanced biceps curl strength and lower-limb lean mass when combined with resistance training. [7] Without resistance training, whey had no significant benefit on muscle strength or lean mass. [7] A 2026 systematic review of 15 trials in 1,161 pre- and postmenopausal women found that benefits could not be confirmed from an isolated increase in protein intake, because effects were tangled up with calorie restriction and exercise. [8]

In plain terms: the trials point to exercise as the main driver, with protein as a supporting actor at best. Nothing we read shows that protein powder alone protects muscle after menopause. For training and older age, see Strength Training and Protein for Older Adults and Perimenopause and Menopause.