Does ME/CFS increase osteoporosis risk? This private-clinic guide explains current evidence on bone health, fracture risk, immobility, vitamin D, nutrition, and when assessment may be worth considering.

People living with ME/CFS often ask whether the condition increases their risk of osteoporosis. The most accurate answer is that ME/CFS is not currently established as a direct cause of osteoporosis, but in some patients it may be linked with circumstances that can increase risk to bone health over time.

This distinction matters. Osteoporosis is a condition in which bones become weaker and more prone to fracture, often without obvious symptoms until a break occurs. For people with ME/CFS, concern about bone health is usually less about the diagnosis itself and more about the secondary effects of prolonged illness — particularly reduced mobility, long periods indoors, low sunlight exposure, restricted diet, weight loss, and other well-recognised risk factors for low bone density.

What current evidence suggests

Research in this area remains limited, but a small study in younger women with ME/CFS found lower bone density measures, while a large cohort study reported an increased fracture risk in people diagnosed with ME/CFS. These findings do not prove that ME/CFS directly causes osteoporosis, but they do suggest that bone health should not be overlooked — especially in patients who are more severely affected.

This cautious view is reflected in major clinical guidance. The CDC notes that osteoporosis can become a long-term issue in very severely affected patients, while NICE has highlighted the need to be alert to complications of prolonged immobility in severe ME/CFS.

Why bone health may be affected in ME/CFS

In clinical practice, the most plausible explanation is usually indirect risk. A patient who is largely housebound or bedbound may have:

• Less weight-bearing activity
• Lower exposure to sunlight, which can affect vitamin D status
• Reduced appetite or a more restricted diet
• Loss of muscle mass and general deconditioning
• Increased frailty or fall risk
• Additional risk factors such as menopause, low body weight, smoking, or medicines that affect bone health

These are recognised contributors to osteoporosis in the general population, and they may become more relevant in someone whose daily life is significantly limited by ME/CFS.

What the evidence does not show

It is important to avoid oversimplified explanations. Current evidence does not show that ME/CFS routinely causes osteoporosis.

A sensible clinical approach is to focus on the established drivers of bone loss: inactivity, low vitamin D, poor nutrition, hormonal status, smoking, alcohol excess, certain medications, low body weight, and increasing age, and ensure that our clients are well supported in all of the applicable areas.

When assessment may be worth considering

A more proactive conversation about bone health may be appropriate if a patient with ME/CFS is:

• Mostly housebound or bedbound
• Postmenopausal
• Eating a restricted diet
• Losing weight or underweight
• Getting very little daylight exposure
• Taking medications that may affect bone density
• Experiencing falls, frailty, or a previous fracture

In these situations, a clinician may consider whether further assessment is appropriate, including review of diet, vitamin D status, fracture risk, and in some cases bone density testing.

Supporting bone health in a practical way

For patients with ME/CFS, bone-health support should be individualised, realistic, and proportionate to symptom severity.

Helpful measures may include:

• Ensuring adequate calcium intake through diet where possible
• Correcting vitamin D deficiency when present
• Avoiding smoking
• Supporting hormone balance
• Moderating alcohol intake
• Only where possible undertaking a tolerable level of light weight-bearing activity
• Reviewing medications and other medical risk factors

Any advice on exercise or rehabilitation must be adapted carefully in ME/CFS. Overexertion can worsen symptoms, so physical activity should never be approached with a one-size-fits-all model.

The bottom line

The current evidence does not support the idea that ME/CFS directly causes osteoporosis in all patients. However, some people with ME/CFS - particularly those who are severely affected or living with long-term immobility, reduced nutritional intake, or low vitamin D exposure - may face a higher practical risk to bone health and could benefit from individual assessment.

A careful, evidence-based approach is best: not alarmist, but not dismissive either.

References

Berkovitz S, Ambler G, Jenkins M, Thurgood S. Bone density and body composition in young women with chronic fatigue syndrome. Am J Med. 2000.

Li YC, Zeng YF, Zhong WF, et al. Chronic fatigue syndrome is associated with the risk of fracture: a nationwide cohort study. J Bone Miner Metab. 2014.

Centers for Disease Control and Prevention. ME/CFS Clinical Care for Severely Affected Patients. Updated 2024.

National Institute for Health and Care Excellence. Myalgic encephalomyelitis (or encephalopathy)/chronic fatigue syndrome: diagnosis and management (NG206). 2021.

National Institute of Arthritis and Musculoskeletal and Skin Diseases. Osteoporosis Causes, Risk Factors, & Symptoms.Reviewed 2022.

National Institute of Arthritis and Musculoskeletal and Skin Diseases. Calcium and Vitamin D: Important for Bone Health.Reviewed 2023.

National Institute on Aging. Osteoporosis. Reviewed 2022.