A Bengaluru woman’s experience has become a cautionary reminder about the risks of self-medicating with vitamin supplements after excessive intake of vitamin D led to dangerously high calcium levels, kidney injury and calcium deposits in her aorta, the body’s largest artery.
The 53-year-old woman had initially been diagnosed with severe vitamin D deficiency and was prescribed weekly vitamin D supplements for six weeks. However, she continued taking the supplements for nearly six months without medical supervision.
When a health supplement becomes a health risk
According to cardiologist Dr Ranjan Shetty, the woman’s vitamin D level had initially been just 6 ng/ml, well below the recommended range. By the time she returned for a follow-up, her calcium levels had risen above normal limits and her kidney function had deteriorated. Imaging tests also revealed calcium deposits in her aorta.
Doctors explained that while vitamin D is essential for bone health and helps the body absorb calcium, excessive supplementation can cause hypercalcaemia — a condition in which calcium levels in the blood become abnormally high.
Excess calcium can affect the heart and blood vessels
Medical experts warn that excess calcium can accumulate in blood vessels, making them stiff and less flexible. This process, known as vascular calcification, can increase strain on the heart and may contribute to cardiovascular complications over time.
High calcium levels may also affect the kidneys and, in severe cases, lead to irregular heart rhythms and other health concerns.
Supplements should be taken only under medical guidance
Doctors emphasise that vitamin D remains important for bone, muscle and cardiovascular health when used appropriately. However, they caution against taking supplements without medical advice or extending prescribed courses on one’s own.
Health experts recommend periodic monitoring of vitamin D and calcium levels for those undergoing supplementation and advise obtaining nutrients through a balanced diet and safe sunlight exposure whenever possible.
A reminder about responsible supplement use
The case highlights a growing trend of people treating vitamins as harmless health boosters. Experts stress that even commonly used supplements can cause serious complications when consumed in excessive amounts or without professional supervision.