Does too little protein increase your risk of bone fractures as you age?
People with low protein in their diet demonstrably face a greater risk of bone fractures, and the difference is not small: hip fractures in particular occur noticeably more often with low protein intake. Make sure your daily diet consistently contains enough protein, especially as you get older.
People with the highest protein intake broke their bones less often than people with the lowest intake. In a large study of more than 132,000 participants followed for an average of 12 years, the difference amounted to 19% fewer osteoporotic fractures and 37% fewer hip fractures in the group that ate the most protein. The more protein, the lower the risk, and this held true for both animal and plant protein. This is an association, not proof that low protein intake itself causes fractures.
Yet that same comparison reveals something striking: bone density (the amount of mineral in the bone) differed barely at all between people with high or low protein in their diet. Higher protein intake therefore seems to lower fracture risk through other routes, possibly via muscle mass and balance. Weaker muscles lead to more falls, and that is the direct path to a serious fracture. The Mediterranean diet, which combines plenty of protein, vegetables and healthy fats, is linked in several large studies to a somewhat lower fracture risk.
As you get older, your body makes less efficient use of protein. At the same time, researchers warn of a specific risk with weight-loss medications (such as semaglutide): the appetite suppression lowers total calorie intake, and with it the absolute amount of protein consumed. In older people, who are already more vulnerable to muscle loss, this could become a problem. Long-term data on this are not yet available.
Protein supplements on top of a normal diet provide no measurable benefit for muscles or bones in healthy older adults. In older patients recovering after a hip fracture, there is some indication that protein supplementation reduces the number of complications. In that situation, it is wise to discuss this with a doctor.
This answer draws on a large study of more than 132,000 participants followed for more than twelve years, and several combined summaries of dozens of smaller studies, including studies in people with controlled conditions. The researchers rate the evidence on protein intake and fracture risk as moderate in quality, but stress that these are associations: other explanations, such as healthier people simply eating more protein, cannot be fully ruled out. For protein supplementation on top of exercise, the researchers rated the evidence as low quality, partly because the studies were too short.
Does diabetes increase the risk of bone fractures?
Yes, diabetes increases the risk of bone fractures, even when bone density measurements look normal. The diabetes medication you use also makes a difference.
Does drinking a lot of coffee increase the risk of bone fractures?
For most people, coffee does not appear to be a proven cause of bone fractures. For women who drink a lot of coffee, some caution is reasonable; in that case, ensure adequate calcium and vitamin D intake.
Are there dietary patterns that have been proven to reduce bone fractures?
Fermented dairy, sufficient vegetables and fruit, and a varied diet with protein and calcium are best supported for bone protection, while soft drinks, alcohol and an overly narrow (vegan) diet without supplementation increase your fracture risk.
Why do bones break more easily as you get older?
With age, bones become both thinner and more fragile through a combination of hormonal changes, deteriorating bone structure and reduced physical activity. Understanding which factors are involved helps you take targeted action: sufficient exercise and a calcium-rich diet are the most concrete levers you have within your own control.
Does being overweight affect your bone density?
Being overweight does not straightforwardly increase bone density, and the location and amount of fat strongly determine whether the skeleton benefits or is harmed. If you are considering losing weight, do so gradually and combine it with strength training to limit bone loss.
How do you prevent bone loss when losing weight at an older age?
Strength training while losing weight is the best protection against bone loss, but cannot prevent it entirely. Combine it with adequate protein intake and discuss it with your doctor if you are losing weight quickly or in large amounts.