Vitamin D and Menopause
Menopause — the permanent cessation of menstrual cycles, average age 51 in the US — creates a hormonal shift that accelerates bone loss and changes vitamin D's role. What vitamin D does and doesn't do around menopause is often misunderstood.
Post-menopausal bone loss
Oestrogen withdrawal causes rapid bone resorption in the first 5–7 years after menopause — women lose roughly 2% of BMD per year in the trabecular spine. Vitamin D alone doesn't prevent this loss, but vitamin D adequacy is a necessary condition for calcium absorption; deficiency accelerates the loss. Anti-resorptive therapy (bisphosphonates, denosumab) and hormone therapy work more effectively when vitamin D is replete. See our osteoporosis page.
Muscle and falls
Post-menopausal women have accelerated sarcopenia, and vitamin D deficiency causes proximal myopathy. Trials of 800–1,000 IU/day + calcium in older women have shown reduced falls (Bischoff-Ferrari 2009 meta-analysis) — a preventable cause of fractures. The falls-prevention effect is one of the more consistent vitamin D trial findings.
What vitamin D doesn't do at menopause
- Hot flashes / night sweats — no consistent RCT evidence of vasomotor symptom relief.
- Vaginal atrophy / GSM — no benefit; vaginal oestrogen is the evidence-based therapy.
- Cognitive changes of menopause — no clear vitamin D effect distinct from age-related cognitive concerns.
- Weight gain — see our weight loss page; menopausal weight gain is not fixed by vitamin D.
Cardiovascular
Post-menopausal women have accelerated cardiovascular risk. The VITAL trial showed 2,000 IU/day for 5 years did not reduce major cardiovascular events in the general population, and post-hoc analyses in women did not reveal a differential benefit. Correcting deficiency remains reasonable for the general effects; do not expect cardioprotection from adding vitamin D on top of already-sufficient status.
Practical dosing at menopause
- Test 25(OH)D at menopause onset and every 1–2 years.
- Target ≥ 30 ng/mL, some clinicians aim 40–50 with osteoporosis therapy.
- Standard dosing 1,000–2,000 IU/day cholecalciferol.
- Ensure adequate calcium (1,200 mg/day total, food-preferred over supplements).
- DEXA scan at 65 (earlier if fracture, family history, chronic steroid, hypogonadism).
- Weight-bearing and resistance exercise is at least as important as any supplement.