Bone Density for Longevity: The Complete Guide

Hip fracture mortality in older adults rivals some cancers. The path starts decades earlier with low peak bone mass, sedentary years, and hormonal shifts.

Biohackers track ApoB and VO₂ max; bone is the structural chassis those systems ride in. Frailty is the failure mode when muscle and bone both decline.

Wolff's law: bone adapts to mechanical load. Progressive resistance training increases bone mineral density at the spine and hip in RCTs, especially when combined with adequate protein and calcium intake.

Vitamin D deficiency impairs calcium absorption; K2 (MK-7) may support directing calcium to bone vs soft tissue — human outcome data are mixed but mechanistically plausible.

DEXA: low radiation scan of hip and spine. T-score for post-menopausal women and men 50+; Z-score for premenopausal women and younger men.

Screen: DEXA baseline at 50 (women) or if risk factors — family history, steroids, low BMI, prior fracture.

Train: 2–4× weekly lifting with axial loading — squats, deadlifts, carries, rucking. See strength-training-longevity and rucking guides.

Nutrients: 1.6g/kg protein; calcium from food (~1000–1200mg/day adults); vitamin D to sufficiency (often 2000–5000 IU D3 with labs); K2 100–200mcg if supplementing D3 long-term — Thorne D3+K2 is a common Amazon stack.

Retest DEXA every 2 years if borderline or improving lifestyle.

BMD changes slowly — 12–24 months to see measurable DEXA shifts from training alone.

Strength and balance improve faster — fall risk drops before scan numbers move.

High-impact and heavy lifting need progression if osteoporotic — medical clearance and supervised programs for T-score ≤ -2.5.

DEXA ~$75–150. Withings scales estimate bone mass poorly — use clinical DEXA.

r/longevity woke up to bone after Attia's frailty framing. Lifters assumed squats were enough — DEXA surprises happen. Consensus: lift, scan, do not wait for a fall.