Vitamin K2 for bones and arteries: strong marketing, thin trial evidence
Supplement makers sell K2 (menaquinone) for stronger bones and cleaner arteries. The observational signal is real; the randomised trials, so far, mostly are not.
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Supplement makers sell K2 (menaquinone) for stronger bones and cleaner arteries. The observational signal is real; the randomised trials, so far, mostly are not.
Progressive resistance and impact training raised bone mineral density in trials, and a landmark study found heavy lifting safe for women with low bone mass. Calcium and vitamin D did not lower fracture risk.
Meta-analyses found calcium pills raised heart-attack risk by around a quarter. A later review — funded by an osteoporosis foundation — found no such link. The disagreement is the story.
Real deficiency shows as bone pain, muscle weakness or, in children, rickets. But US surveys suggest most people meet their needs, and both a 2011 and a 2024 review advise against routine testing in healthy adults.
Abaloparatide reliably raises bone density, so it seemed a natural candidate to help fractures knit. A randomised trial found no benefit — and healing numerically favoured placebo.
Losing a little height with age is expected. But marked loss tracks real risk: men who lost 3 cm or more had 45% higher mortality, and women who lost over 5 cm had roughly 50% higher hip-fracture risk.
Men break fewer bones than women but die more often after a hip fracture. No major body recommends screening every man, and the US task force says the evidence is simply not there yet.
The 2025 USPSTF statement keeps a B recommendation for women 65+ and for higher-risk younger postmenopausal women. The fracture benefit is real but small, and evidence gaps remain.
In the LIFTMOR trial, brief twice-weekly heavy lifting raised spine bone density in postmenopausal women with low bone mass, while a gentle home programme lost ground. A Cochrane review finds a smaller but real effect.
In 2,292 hip fractures across six cities in Nagano, snowfall raised the odds of admission — until the models adjusted for how cold it was, at which point the association disappeared.
Adding milk, yoghurt and cheese cut hip fractures 46% in Australian aged-care residents. In the general over-50 population, dietary calcium intake shows no association with fracture risk at all.
A phase 2 trial of dasatinib plus quercetin missed its bone endpoint. A senolytic injected into the eye produced a 5.6-letter vision gain whose confidence interval crosses zero.
In 388 female athletes, a per cent fat Z-score below −1.0 more than doubled sensitivity for amenorrhoea against standard BMI thresholds. It gave up specificity to do it.
The LIDA trial tested whether romosozumab's bone-building window closes early enough to shorten treatment. It met non-inferiority on hip bone density — at a single centre, with 50 participants, over one year.
Black cohosh, Chinese herbal medicine and vitamin D reached moderate certainty for specific outcomes. Most of the rest of the field — 158 studies deep — sits at low or very low certainty.
Seven of those nine were denosumab. The committee's September opinions also covered an RSV antibody for infants, a first EU treatment for IgG4-related disease, and four withdrawn applications.
An EMAS clinical guide sets out how to manage endometriosis after menopause, advising against oestrogen-only hormone therapy even in women who have had a hysterectomy.