Research review
Does whey protein help with menopause? What the research does and doesn't show
Research on whey protein in postmenopausal women is about muscle mass and strength, not hot flashes or other menopause symptoms, and the largest review found no benefit unless whey protein was paired with resistance training.
The evidence doesn't support whey protein by itself preserving muscle in postmenopausal women — the largest review on the topic found no benefit without resistance training. What research exists on whey protein and menopause is specifically about muscle mass and strength, not hot flashes or other menopause symptoms; no trial has tested whey protein for those directly.
What the evidence doesn't support
It doesn't support whey protein by itself, without resistance training, maintaining or building muscle strength or lean mass in postmenopausal women — the largest systematic review and meta-analysis on the topic found no significant benefit on muscle strength or lean mass when whey protein was taken without a structured training program. It doesn't support whey protein for menopause symptoms like hot flashes, night sweats or mood changes: no trial in this literature measured those outcomes at all, only muscle-related ones. And it doesn't support whey protein adding a training benefit beyond a placebo when it's taken around exercise sessions, according to the one trial that tested that specific comparison.
What the trials found
A 2022 systematic review and meta-analysis in Nutrients pooled 14 studies (10 in the meta-analysis) of whey protein supplementation in women aged 55 and older. When whey protein was paired with a structured resistance-training program, it produced a significant improvement in biceps curl strength and lower-limb lean mass compared with placebo. Without resistance training, whey protein showed no significant effect on muscle strength or lean mass — and dietary protein intake from food was actually lower in that subgroup, likely because the supplement displaced food protein rather than adding to it. Neither subgroup showed a significant effect on fat mass or body weight.
A smaller 10-week trial gave 12 postmenopausal women whey protein or a maltodextrin placebo around unilateral resistance-training sessions, twice a week, with each side of the body randomized to a different drink. Both sides gained muscle strength and thickness over the 10 weeks, but there was no difference between the whey-protein side and the placebo side — in this trial, timing whey protein around training didn't add anything beyond the training itself.
A 2023 randomized trial measured how much whey protein it took to maximize a muscle-building signal (myofibrillar protein synthesis) in 40 overweight, postmenopausal women after five days of calorie restriction. A 35 g dose of whey protein produced a significantly greater muscle-protein-synthesis response than a 15 g dose did; a 60 g dose produced no further increase over 35 g. That describes an acute biological response measured with muscle biopsies in a lab, not a change in muscle mass or strength over time.
Questions people ask
Does whey protein help with menopause symptoms like hot flashes?
No trial has tested that. Every study located for this review measured muscle mass, strength or muscle-protein-synthesis rates in postmenopausal women — none measured hot flashes, night sweats, mood or other menopause symptoms, so there's no research to report on that question either way.
Does whey protein help with menopause-related weight gain?
Not based on the evidence located here. The systematic review above found no significant effect of whey protein on fat mass or body weight in postmenopausal women, whether or not it was paired with resistance training.
How much whey protein should I take after menopause?
There's no dose established for a menopause-specific benefit, since none has been shown to base one on. The dosing trial above found 35 g of whey protein produced a larger acute muscle-building response than 15 g did in postmenopausal women after a period of calorie restriction, with no further benefit from 60 g — but that's a single lab measurement of a biological response, not a study of muscle mass or strength change over time.
When to talk to a doctor
Menopause is a normal life stage, not a condition whey protein treats. Significant or rapid muscle loss, unexplained weight change, or symptoms that interfere with daily life are worth raising with a doctor, who can evaluate hormonal, nutritional and other causes. If you're considering a higher-protein diet or a protein supplement around menopause — especially alongside a kidney condition or another diagnosis — ask a doctor or dietitian first.
Related reading: whey protein benefits: what the research does and doesn't show, how much whey protein to take a day, and what is whey protein.
Sources
- Effect of Whey Protein Supplementation in Postmenopausal Women: A Systematic Review and Meta-Analysis A meta-analysis in postmenopausal women found whey protein improved strength and lean mass only when paired with resistance training, and found no significant change in body weight or fat mass in either group, with or without training.
- Whey protein and high-volume resistance training in postmenopausal women A 10-week trial in 12 postmenopausal women found resistance training increased muscle strength and thickness on both sides of the body, with no added benefit from whey protein taken during training versus a placebo.
- Dose-Response of Myofibrillar Protein Synthesis To Ingested Whey Protein During Energy Restriction in Overweight Postmenopausal Women: A Randomized, Controlled Trial A dosing trial in 40 postmenopausal women found 35 g of whey protein produced a maximal acute muscle-protein-synthesis response after a period of calorie restriction, with no added benefit from a 60 g dose over 35 g.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.