Calcium deficiency
Linked to Calcium
Chronic low calcium weakens bones and can disturb muscle and nerve function.
Where it shows on the body
Rotate the figure and click a red marker to see the affected area. Internal organs open a 3D organ model.
Causes
- Low dietary calcium
- Low vitamin D
- Hormonal changes (menopause)
- Malabsorption
Symptoms
- Muscle cramps and spasms
- Numbness and tingling
- Brittle nails
- Weak bones
- Dental problems
What happens if untreated
- Osteoporosis and fractures
- Abnormal heart rhythm in severe cases
Who is most at risk
- Post-menopausal women
- Older adults
- People avoiding dairy
Prevention & sources
- Calcium-rich foods
- Adequate vitamin D
- Weight-bearing exercise
Correcting it: foods, amounts & timing
Foods that help & safe amounts
- Dairy or fortified plant milks — 2–3 servings a day
- Tofu set with calcium, tinned fish with bones, and leafy greens
- Around 700–1000 mg/day for adults; ensure enough vitamin D so it is absorbed
Cramps and tingling settle within days to weeks; bone density changes take months to years.
Sources & references
Symptoms overlap — testing matters
Most deficiency symptoms (fatigue, poor concentration, skin and hair changes) are shared across several nutrients and many unrelated conditions. A symptom on this page is a reason to investigate, not a diagnosis.
A GP can confirm or rule out a deficiency with a blood test and check for underlying causes such as absorption problems. Do not start high-dose supplements on suspicion alone — some nutrients are harmful in excess, and supplementing before testing can mask the underlying result.