I didn’t know when I collapsed at work – it was low vitamin D

by | Oct 30, 2026 | Health

I didn't know when I collapsed at work - it was low vitamin D

A 23-year-old special educational needs teacher experienced a sudden collapse at work accompanied by dizziness, nausea, heart palpitations, and elevated body temperature. Despite appearing fit and healthy as a keen athlete playing football four times weekly, she was subsequently diagnosed with severe vitamin D deficiency following blood tests.

Data from the National Diet and Nutrition Survey indicates rising vitamin D deficiency rates among certain age groups in the UK, with particular concern noted among girls and young women. Last year, nearly a quarter of 11- to 18-year-olds were classified as deficient in the nutrient. Vitamin D can be obtained through dietary sources such as oily fish and meat, as well as through supplements, but the majority is synthesized by the body when ultraviolet light from sunlight contacts the skin. Geographic location and seasonal variations affect sunlight exposure levels and consequently the body’s capacity to produce vitamin D. Additionally, factors such as skin coverage and sunscreen use impact vitamin D production, while individuals with darker skin require stronger light exposure to generate equivalent amounts compared to those with lighter skin.

Doctors typically do not routinely screen patients for vitamin D deficiency through blood tests but may recommend supplements for those identified as high-risk. The deficiency is associated with rickets in infants and a comparable bone-weakening condition called osteomalacia in adults. Medical professionals describe the condition as difficult to identify, noting that symptoms such as fatigue, joint pain, and bone pain can be overlooked or attributed to other causes. A paediatric endocrinologist described the condition as “silently eating away at the bones, leaving them softened and prone to breaks.”

Clinicians and academics have formed a group called ACT NOW Vitamin D, advocating for raising the deficiency threshold to identify more affected individuals and enable earlier treatment. Experts warn of potential multi-generational health impacts, particularly affecting women through adolescence, pregnancy, and newborn health. Researchers suggest the government should consider broader food fortification policies similar to mandatory programs in countries like Canada and Sweden, whereas current UK fortification of foods such as breakfast cereals and spreads remains voluntary. Some experts propose that vitamin D supplementation may need to become routine for certain populations, particularly during winter months when vitamin D levels naturally decline.

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