Supplements for bone health 50+

The bone-health stack after 50 — rationale by ingredient

Vitamin D3 1,000–2,000 IU/day (test and correct)

Vitamin D supports intestinal calcium absorption and muscle function. Combined calcium + vitamin D supplementation reduces fracture risk in older adults at appropriate dose ranges. Test 25-OH-D and target 30–50 ng/mL. Avoid megadose annual bolus regimens (linked to increased falls in some trials). Daily or weekly modest doses are safer.

Calcium — dietary first; supplement only the gap

Target total calcium 1,000–1,200 mg/day for postmenopausal women and men 70+. Get as much as possible from food (dairy, fortified plant milks, leafy greens, calcium-set tofu, sardines). Supplement only the dietary gap; 500–600 mg max in a single dose for absorption. Calcium citrate is better absorbed than carbonate, particularly in users on PPIs. Excess supplemental calcium (>1500 mg/day) has been associated with cardiovascular risk signals in some analyses — dose modestly.

Vitamin K2 (MK-7) 100–180 µg/day

K2 activates osteocalcin (directs calcium into bone) and matrix Gla protein (prevents vascular calcification). The Knapen and EPOS trials support K2 supplementation for bone density and reducing vascular calcification. Important caveat: contraindicated with warfarin (vitamin K antagonist) — coordinate with prescriber if on anticoagulation.

Magnesium glycinate 200–400 mg elemental at bedtime

Magnesium is a cofactor in bone formation and modulates parathyroid hormone. Many older adults have suboptimal magnesium intake. Glycinate form is well-tolerated for chronic dosing without laxative effect. Stacks with sleep benefit.

Protein 1.0–1.2 g/kg/day (or 1.2–1.5 g/kg for active older adults)

Adequate protein supports bone mass through preservation of muscle (a major contributor to bone loading), reduction of falls risk, and bone matrix protein synthesis. Older adults often under-consume protein. Whey or plant-based protein supplementation to hit daily targets is reasonable. Distribute across meals (25–30 g per meal).

Creatine 3–5 g/day

Strong evidence for muscle preservation in older adults; emerging signal for reducing falls. Falls — not bone density — kill in osteoporosis. Creatine plus resistance training is one of the best-evidenced anti-sarcopenia interventions, and indirectly protective for bone via muscle and balance.

Omega-3 (EPA/DHA) 1–2 g/day

VITAL trial showed no general fracture reduction in unselected older adults; subgroup signals suggest possible benefit in those with low dietary fish intake. CV and anti-inflammatory benefits are independent reasons to include.

B12 (and folate / B6 if elevated homocysteine)

Elevated homocysteine is associated with bone fragility. Older adults frequently have B12 absorption issues (atrophic gastritis, PPIs, metformin). Test B12 and supplement if low.