People with type 2 diabetes can have higher-than-average bone density while facing a significantly greater risk of hip fractures, highlighting the limits of relying on scans alone.
A normal bone-density scan does not necessarily mean a person is protected from fractures, particularly in type 2 diabetes. According to a report in Liberty Times and comments from nutritionist Zeng Jian-ming, people with type 2 diabetes may have average bone mineral density that is 5% to 10% higher than those without diabetes, yet their relative risk of hip fracture is still about 1.79 times as high. That warning matches long-standing research showing that fracture risk in diabetes is not fully explained by bone-density numbers alone.
The reason, experts say, is that bone strength is more than the amount of mineral packed into the skeleton. Reviews in the medical literature note that diabetes can impair bone quality through mechanisms such as the build-up of advanced glycation end products, or AGEs, which can alter collagen and weaken the material properties of bone. Poor glucose control has also been linked with higher fracture risk even when bone density is higher than expected, suggesting that denser bone can still be more fragile.
Another concern is that common fracture-risk tools may underestimate danger in diabetes. Zeng said the FRAX calculator, which is widely used to estimate fracture risk, does not directly include type 2 diabetes in its traditional model. That concern is supported by earlier reviews, which found that fracture risk in both type 1 and type 2 diabetes rises for reasons not captured by bone-density testing alone.
For people with diabetes, the practical message is to look beyond the scan result. The advice highlighted in the Liberty Times piece focuses on keeping blood sugar steady, avoiding hypoglycaemia that could lead to falls, eating enough calcium, vitamin D and protein, and adding resistance and balance exercise where appropriate. But the evidence on supplements is mixed: a large BMJ review found that calcium, vitamin D, or both have little to no effect on preventing fractures or falls in the general population, and a JAMA evidence review reached a similar conclusion. A diabetes-focused review still recommends ensuring adequate intake and tailoring nutrition for people with kidney disease, where protein needs may differ.
For clinicians and patients alike, the key point is that fracture prevention in diabetes needs a broader lens than bone mineral density alone. A history of falls or prior fractures, muscle weakness, visual problems and neuropathy all matter, and the most useful assessment is often one that combines bone health, fall risk and overall metabolic control.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
