longevitywatch

Bones

Bone density, osteoporosis and strong bones in later life.

65 answers, from 450 studies
Last updated: September 2026
Key questions
Which supplements are proven to help strengthen bones?
For bone strengthening, the combination of calcium and vitamin D is the best supported by evidence, especially in cases of…
Yes · Strong evidence
Why do bones become more brittle after menopause, and what can help?
Bone loss after menopause is well understood and partly preventable: oestrogen deficiency is at the core, but good nutrition,…
Yes · Strong evidence
What does a DEXA scan tell you that a regular bone density measurement does not?
A DEXA scan provides an accurate number for bone density at the clinically most relevant sites, plus body composition and a…
Yes · Strong evidence
Does strength training work as well as medication for osteoporosis?
Strength training demonstrably improves bone density and offers additional benefits that medication does not provide, but the…
Moderate evidence
How do you prevent bone loss when losing weight at an older age?
Bone loss during weight loss at an older age can largely be limited by combining strength training and adequate protein intake…
Yes · Moderate evidence
Which form of vitamin K2 is better: MK-4 or MK-7?
MK-7 has clearly better absorption than MK-4 at normal supplementation doses, and also activates proteins for bone and blood…
Moderate evidence
How much vitamin D should you take per day?
For healthy adults under 75, extra vitamin D is probably not necessary, but for children, people aged 75 and older, pregnant…
Moderate evidence
Should you take vitamin D together with vitamin K2?
For people with osteoporosis there is reasonable evidence that vitamin K2 and D together do more for bone density than either…
Moderate evidence
Latest articles
08 Sep
A gene-edited pig kidney made way for a human one
Two patients first received a kidney from a genetically modified pig and then, months later, a human kidney. Both transplants…
1 min
31 Aug
Exercise cuts a gut metabolite that harms bones
Regular exercise is known to protect bones. But new research reveals a specific biochemical link: physical activity lowers a…
1 min
29 Aug
Exercise protects bones through gut bacteria
Exercise is good for your bones. That much has long been established. But the precise mechanism remained unclear.
2 min
25 Aug
Bone drug extends life in fast-aging mice
A drug already used against bone loss turns out to also extend lifespan and improve muscle strength in mice with accelerated…
2 min
13 Aug
Blood stem cells can be rejuvenated several ways
The immune system weakens as blood stem cells in the bone marrow age.
2 min
07 Aug
Tau protein disrupts mitochondria in brain cells
Tau has long been a prime suspect in Alzheimer’s disease. Now it turns out the protein can also directly sabotage the…
1 min
05 Aug
Muscle and bone loss in aging share molecular roots
Growing older often means losing both muscle mass and bone density. For a long time these two processes were studied…
1 min
29 Jul
Aging skin weakens bones through a secreted protein
Bones weaken as we age. That much is well known. But that the skin plays an active role in this process is new.
1 min
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