Most people don’t think about their bone health until something breaks. By that point, significant bone density loss has already occurred. The good news is that bone loss is largely preventable — and the nutritional tools to protect your skeleton are readily available.
Why Bone Health Matters
Bone is not static — it is continuously remodelled by osteoclasts (bone-breaking cells) and osteoblasts (bone-building cells). Until your late 20s, building outpaces breakdown, reaching peak bone density. After that, the balance gradually shifts. Osteoporosis — when bone becomes so porous it fractures easily — affects 3 million people in the UK and causes 500,000 fractures per year. A hip fracture has a 30% one-year mortality rate in older adults, making osteoporosis a genuinely life-threatening condition. Yet over 80% of fractures in people over 50 are preventable.
Calcium: Getting the Amount Right
The UK reference nutrient intake for calcium is 700mg/day for adults; around 1000–1200mg is recommended for postmenopausal women and older men. The body can absorb a maximum of approximately 500mg at once — so split calcium supplement doses through the day. Calcium carbonate is the most concentrated form (40% elemental calcium) but requires stomach acid for absorption — best taken with food. Calcium citrate doesn’t need stomach acid, making it preferable for those on PPIs or with low stomach acid. Don’t exceed 2500mg total daily calcium (diet + supplement) — excess calcium has been linked in some studies to kidney stones and possibly cardiovascular risk (though the evidence is contested).
The Vitamin D Dependency
Without adequate Vitamin D, only 10–15% of dietary calcium is absorbed. With sufficient Vitamin D, this rises to 30–40%. Taking calcium without Vitamin D wastes most of it. The two should always be taken together. D3 (cholecalciferol) in oil-based formulations (soft gels) is more effective than D3 in dry powder tablets. Target serum 25(OH)D level: 75nmol/L or above for optimal bone protection.
Vitamin K2: Directing Calcium to the Right Place
Vitamin K2 (menaquinone, particularly MK-7 form) activates osteocalcin — a protein produced by osteoblasts that binds calcium into the bone matrix. Without K2, supplemental calcium may be deposited in arterial walls rather than bone. The evidence base for K2 in bone health is growing, though large-scale RCTs are still limited. The combination of D3 + K2 MK-7 is increasingly standard in quality bone health supplements. Dietary sources of K2 include natto (extremely high), hard cheeses, egg yolks, and butter — many people are insufficient. K2 is also being studied for cardiovascular protection (reducing arterial calcification).
Exercise: The Non-Negotiable
No supplement replaces the stimulus of weight-bearing exercise for bone remodelling. Bones respond to mechanical loading by increasing density. Walking, jogging, dancing, tennis and resistance training all count — swimming and cycling, though excellent for cardiovascular fitness, are non-weight-bearing and less effective for bone. NICE guidelines recommend that all older adults at risk of osteoporosis engage in weight-bearing exercise alongside supplementation.
Browse Bone Health supplements at Huncoat Pharmacy. Related: Everyday Supplements Guide.