Calcium and Vitamin D for Bone Health in Active Women
Strong bones need calcium, vitamin D and loading exercise. Here's how active women can get enough.
Vitamins and Health Supplements
1. Daily Needs
| Age | Calcium | Vitamin D |
|---|---|---|
| 19 - 50 | 1,000 mg | 600 IU |
| 51 - 70 (women) | 1,200 mg | 600 IU |
| 71+ | 1,200 mg | 800 IU |
2. Food First
- Dairy: milk, yogurt and cheese
- Fortified plant milks and tofu made with calcium
- Canned salmon and sardines with bones
- Leafy greens like kale and bok choy
3. Supplement Tips
- Supplement only the gap your diet doesn't cover
- Take calcium in doses of about 500 mg or less for best absorption
- Calcium carbonate with food; citrate any time
- Test vitamin D levels to guide dosing
- Pair with weight-bearing and strength exercise
4. Why Active Women Need Calcium and Vitamin D
Bone density peaks in early adulthood, and active women need adequate calcium and vitamin D to build and maintain strong bones. Low energy availability, common in endurance athletes, can disrupt hormones and increase stress fracture risk. Getting enough calories, calcium and vitamin D supports bone health throughout life.
Strength training and impact exercise also stimulate bone growth.
5. Vitamin D Testing
A simple blood test measures vitamin D levels. Many people are low, especially in winter or if they spend little time outdoors. Your doctor can recommend an appropriate dose based on results.
6. Calcium Supplement Side Effects
Calcium supplements can cause constipation or bloating; splitting doses may help.
7. Calcium for Vegan and Dairy-Free Athletes
Dairy-free athletes can get calcium from fortified plant milks, calcium-set tofu, almonds, leafy greens like kale and bok choy, fortified cereals and canned fish with bones. Check labels for calcium content and aim to meet daily needs through food where possible. Supplements can fill gaps.
Vitamin D from sunlight, fortified foods or supplements supports calcium absorption.
8. Our Recommendation
Meet calcium needs mainly through food, test vitamin D and lift weights regularly.
9. How Much Calcium and Vitamin D You Need
Most adults need around 1,000 milligrams of calcium daily, rising to about 1,200 milligrams for women over 50 and men over 70. Vitamin D recommendations are typically 600 to 800 IU daily, though people with low blood levels may need more under medical guidance. Getting calcium from food first and supplementing only the gap helps avoid excessive intake.
Take calcium supplements in doses of 500 milligrams or less at a time for better absorption.
10. Calcium Carbonate vs Calcium Citrate
Calcium carbonate is inexpensive and absorbs best with food. Calcium citrate absorbs well with or without food and suits people taking acid-reducing medications or older adults with lower stomach acid.
Final Thoughts
Calcium and vitamin D work together with strength training to protect bones. Get most calcium from food, supplement the gap, test vitamin D and lift weights for the best osteoporosis prevention. This article is for general information only and isn't medical advice. Talk to a doctor or registered dietitian before starting a supplement, especially if you're pregnant or nursing, take medication or have a health condition.
Frequently Asked Questions
- Can you take too much calcium?
- Yes; very high intake from supplements may raise kidney stone risk.
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