Eating for bone health in perimenopause: calcium and vitamin D
As oestrogen falls, bone loss speeds up. Here's how much calcium and vitamin D you need in perimenopause, the best food sources, and why exercise and protein matter too.
Bone is the quiet story of perimenopause. It doesn’t announce itself, but it’s exactly when protecting your skeleton pays the biggest dividends — and nutrition is a real part of that.
Why bone loss speeds up now
Oestrogen helps keep bone remodelling balanced by slowing the breakdown of old bone. As oestrogen declines through perimenopause and after menopause, breakdown outpaces rebuilding. Women lose on average 1–2% of bone density a year around menopause — fastest for roughly five to ten years — and the Endocrine Society notes that up to 20% of bone loss can happen across the transition. That’s the window where calcium, vitamin D, protein and movement matter most.
How much calcium do you need?
Here the guidance genuinely differs by country, so it’s worth being precise:
- UK (NHS/SACN): about 700 mg a day for most adults.
- US (Institute of Medicine, 2011): 1,000 mg for women 19–50, rising to 1,200 mg for women 51+.
The Royal Osteoporosis Society advises getting calcium from food first, and suggests those at higher risk of osteoporosis may be guided up toward ~1,000 mg a day. The upper limit is 2,000 mg — more is not better.
Good sources: dairy, fortified plant drinks, tofu set with calcium, tinned fish with soft bones (sardines), and leafy greens like kale.
Don’t forget vitamin D
Vitamin D lets your body absorb calcium, so calcium alone isn’t enough. UK guidance is 10 micrograms (400 IU) a day, and because it’s hard to get from food, the NHS advises a supplement in autumn and winter — and year-round if you’re rarely outdoors or have darker skin. US reference intakes are 600 IU through age 70 and 800 IU after, with an upper limit of 4,000 IU.
Nutrients support bones — they don’t replace loading
This is the part supplements can’t do for you. Bone responds to being loaded. The Royal Osteoporosis Society advises a combination of weight-bearing and muscle-strengthening (resistance) exercise, plus adequate protein (meat, fish, dairy, or plant sources like tofu and pulses, roughly twice a day) to maintain the muscle that protects bone. Food and movement work together.
The honest takeaway
Aim for enough calcium from food, top up vitamin D — especially in the darker months — keep protein steady, and move in ways that load your bones. None of it requires a diet or a number on a scale; it’s about maintenance, not size.
This is general information, not medical advice. Talk to your doctor about your bone health, especially before starting supplements or if you’re at risk of osteoporosis.
References
- Institute of Medicine — Dietary Reference Intakes: Calcium and Vitamin D (2011)
- IOM 2011 DRI clinician summary (J Clin Endocrinol Metab / PMC)
- NHS — Food for strong bones
- Royal Osteoporosis Society — Nutrition for bones (calcium)
- Endocrine Society — Menopause and bone loss
General information, not medical advice. Reviewed for accuracy; always consult a qualified professional about your health.
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