Prof Tim Spector issues warning – taking common pill every day could be ‘dangerous’
Professor Tim Spector has cautioned that taking too much of a commonly consumed supplement daily could pose a risk to health. The supplement in question is vitamin D, which plays a vital role in regulating calcium and phosphate levels in the body, essential for keeping bones, teeth, and muscles healthy and preventing conditions like rickets. While much of our required vitamin D is obtained from sunlight exposure, the lack of sun during autumn and winter in the UK can lead to deficiencies, prompting many to turn to supplements. The NHS even recommends vitamin D supplementation between October and March to combat this issue.
However, Prof Tim Spector highlighted the importance of being cautious about the dosage of vitamin D consumed, as excessive amounts could lead to adverse health effects. In a recent Zoe Health podcast, he revealed that overdosing on vitamin D could result in increased fractures and falls, contrary to prior beliefs. Some individuals resort to high-dose vitamin D tablets available online for self-medication, unaware of the potential risks associated with excessive intake.
Studies, such as one published in the Journal of the American Medical Association (JAMA) in 2018, have indicated that high doses of vitamin D are linked to a higher incidence of fall-related outcomes. Another study from 2010, also published in JAMA, found an increased risk of falls and fractures in individuals taking 500,000 international units (IU) of vitamin D3 daily, exceeding the NHS recommendation of 400 IU to 2,000 IU per day.
Dr Federica Amati, featured in the podcast, emphasised the variability in recommended vitamin D intake based on individual circumstances and diet. The NHS advises a daily intake of 10 micrograms (400 IU) for most adults and warns against exceeding 100 micrograms (4,000 IU) daily due to potential harm, including hypercalcaemia, leading to weakened bones, kidney damage, and heart issues.
It is crucial to be mindful of vitamin D consumption, as excessive intake can have serious consequences on health. Following NHS guidelines for supplementation can help maintain optimal levels of this essential nutrient without risking harmful effects.