Strontium Supplements: The Bone-Building Mineral You've Never Heard Of

Medically reviewed by Dr. Sarah Mitchell, MD — Internal Medicine

See also: Best Calcium Supplements 2026: Citrate vs Carbonate vs Bone Health | Best Supplements for Bone Health 2026: Beyond Calcium

What Is Strontium and Why Should You Know About It?

Strontium is a trace mineral that sits directly below calcium on the periodic table — meaning it has similar chemical properties. In the body, strontium follows calcium pathways and is incorporated into bone matrix.

While not as well-known as calcium or vitamin D3, strontium has unique bone-building properties that make it one of the most promising minerals for osteoporosis prevention.

How Strontium Builds Bone

Strontium works through a dual mechanism that no other mineral can match:

1. Stimulates osteoblast activity — Strontium activates the calcium-sensing receptor on osteoblasts, stimulating them to build new bone matrix
2. Reduces osteoclast activity — Strontium decreases the formation and activity of osteoclasts (cells that break down bone)

This dual action — building more bone while breaking down less — is unique among bone-supporting nutrients. Most other nutrients either build OR prevent loss, but strontium does both.

Clinical Evidence: Strontium for Bone Health

Strontium Ranelate (Prescription Form)

• Study: Reginster et al., 2005 — 1,649 postmenopausal women with osteoporosis
• Result: 41% reduction in vertebral fractures over 3 years
• Dose: 2g/day (strontium ranelate)
• Status: Prescription drug in Europe; not FDA-approved in US

Strontium Citrate (Supplement Form)

• Study: Dawson-Hughes et al., 2009 — 172 postmenopausal women
• Result: Significant increase in bone density at the lumbar spine and hip
• Dose: 340-680mg/day (strontium citrate)
• Status: Available as dietary supplement in US

💡 Key insight: While strontium ranelate is more studied, strontium citrate (the supplement form) shows similar bone-building effects at appropriate doses.

Optimal Strontium Dosage

Important: Strontium and Bone Density Measurements

⚠️ Strontium affects DEXA scan results. Because strontium is denser than calcium, bones containing strontium will appear denser on DEXA scans — even if the actual bone quality hasn’t improved. This means:

• DEXA scans may overestimate bone density by 5-10% when taking strontium
• Always inform your doctor if you’re taking strontium before DEXA scans
• Bone turnover markers (P1NP, NTX) are more accurate for monitoring strontium’s effects

Strontium-Rich Foods

Who Benefits Most from Strontium?

✅ Likely to benefit:

• Postmenopausal women with bone loss
• Men with osteoporosis
• Those who cannot tolerate bisphosphonates
• People with osteopenia wanting to prevent progression

❌ Should avoid:

• People with kidney disease (reduced strontium excretion)
• Those with Paget’s disease of bone
• Children (limited safety data)

The Complete Bone-Building Stack with Strontium

1. Strontium citrate — 340mg (morning, away from calcium)
2. Calcium citrate — 1000mg (evening)
3. Vitamin D3 — 4000 IU
4. Vitamin K2 MK-7 — 200mcg
5. Magnesium glycinate — 400mg
6. Boron — 6mg

💡 Timing: Take strontium and calcium at least 2 hours apart — they compete for absorption. Strontium in the morning, calcium in the evening is optimal.