How to protect your bones: an evidence-based plan for women

Reviewed by Emma Carter, Senior Health & Nutrition Editor

Bone health is a long game, and one where women have more at stake. Bone is living tissue that you build up to about age 30 and then work to keep, and the drop in estrogen at menopause speeds up loss just when it matters most. The reassuring part is how much is in your hands: what you eat, how you move, and a few habits shape your bones for decades.

Why women's bones need attention

You reach peak bone mass in your late twenties to early thirties. After that the goal shifts from building to maintaining. For women, the turning point is menopause: as estrogen falls, bone loss accelerates, most sharply in the first few years after periods stop. Over time that raises the risk of osteoporosis, where bones thin and break more easily. None of this is inevitable, and the steps that protect bone are the same ones that support the rest of your health.

The nutrition foundation: calcium and vitamin D

Calcium is the main building block of bone, and vitamin D is what lets your body absorb it. They work as a pair.

On the vitamin D row, a 2024 review argues 2000 IU (50 micrograms) a day suits most adults, targeting a blood level at or above 30 ng/mL and staying under the 4000 IU upper limit (Nutrients, 2024).

For calcium, food is the better source. Dairy, fortified plant milks, canned salmon or sardines with the bones, calcium-set tofu and leafy greens add up quickly. Taking large calcium supplements you do not need adds no benefit and may carry risks: reviews in postmenopausal women find the effect of calcium plus vitamin D on bone density and fractures is small and variable, while supplement users had slightly more kidney stones, about one extra case per 273 women over 7 years (Indian J Endocrinol Metab, 2013). Reach for food first and supplement only a genuine gap. Vitamin D is harder to get from food, so a daily supplement is sensible for most women in the darker months.

Move to build bone

Bone responds to being loaded, so the right exercise tells it to stay strong.

• Weight-bearing exercise, like brisk walking, jogging, dancing or stair-climbing, works bone against gravity.
• Resistance training, with weights, machines or bands, is one of the best tools for maintaining bone and the muscle that supports it.
• Balance work, such as yoga or tai chi, lowers the risk of falls, which is what turns fragile bone into a fracture.

Swimming and cycling are excellent for fitness but do less for bone, so pair them with some weight-bearing or resistance work. Enough protein matters too, since bone is more than minerals and protein supports the surrounding muscle.

Habits that quietly harm bone

A few things work against your bones and are worth minding: smoking, drinking heavily, and very low body weight or repeated crash diets, which deprive bone of what it needs. Steady, adequate nutrition protects bone better than any single supplement.

Protecting bone through the life stages

The strategy shifts with age. In your twenties and thirties, build and bank bone with good nutrition and regular loading. Through perimenopause and menopause, the priority becomes slowing loss, and this is the moment to be deliberate about calcium, vitamin D and resistance training. For some women, HRT also helps protect bone, which is worth discussing with a doctor alongside its other benefits and risks.

When to see a doctor

Talk to your doctor if you have risk factors for weak bones: early menopause, a family history of osteoporosis, previous fractures from minor falls, long-term steroid use, or a very low body weight. A bone density scan, known as a DEXA scan, can assess your risk and guide whether lifestyle steps alone are enough or whether treatment would help. Acting before a fracture is far better than after one.

Frequently asked questions

How much calcium and vitamin D do women need for bone health?

Women aged 19 to 50 need about 1000 mg of calcium a day, rising to 1200 mg from age 51. For vitamin D, most adults need 600 IU (15 mcg), rising to 800 IU (20 mcg) after 70. Food comes first for calcium; vitamin D often needs a supplement, especially in winter.

What exercise is best for bones?

Weight-bearing exercise like walking, jogging, dancing or stair-climbing, and resistance training with weights or bands, both signal bones to stay strong. Balance work such as yoga or tai chi lowers the risk of falls. Swimming and cycling are great for fitness but do less for bone.

Why does menopause affect bone health?

Estrogen helps protect bone, so when it falls around menopause, bone loss speeds up, most sharply in the first few years. That is why the years around menopause are when protecting your bones matters most, through nutrition, exercise, and medical options where appropriate.

Can I get enough calcium without supplements?

Many women can. Dairy, fortified plant milks, canned fish with bones, tofu set with calcium, and leafy greens add up quickly. Food is the better source, and taking large calcium supplements you do not need offers no extra benefit and may carry risks, so aim for food first.

When should I get my bone health checked?

Talk to your doctor if you have risk factors: early menopause, a family history of osteoporosis, previous fractures from minor falls, long-term steroid use, or a very low body weight. A bone density (DEXA) scan can assess your risk and guide next steps.

References

1. Calcium and vitamin D in post menopausal women · Indian Journal of Endocrinology and Metabolism, 2013
2. Vitamin D supplementation: a review of the evidence arguing for a daily dose of 2000 IU for adults · Nutrients, 2024
3. Calcium: fact sheet for health professionals · NIH Office of Dietary Supplements
4. Vitamin D: fact sheet for health professionals · NIH Office of Dietary Supplements