Vitamin D supplements are not effective, and could be dangerous, studies find

Posted 26 January 2016

This article, written by Prof. Tim Spector, Professor of Genetic Epidemiology, King’s College London, argues that evidence to support the claims for Vitamin D is lacking, and that taking Vitamin D may even be dangerous. Solal made outrageous claims for its Vitamin D supplements, including that it was more effective than vaccines!

However, a new paper on the risks that vitamin D may pose finally has convinced me that I was wrong. My view on vitamin supplements and the multi-billion dollar industry behind them altered radically after I began researching my book, The Diet Myth, in 2013. The industry and its PR is supported by celebrities who reportedly have high-dose vitamins drip fed into their veins, and around 50% of Americans and Britons take them regularly. But surprisingly, there is a lack of evidence to support the health benefit claims of virtually all vitamin supplements on the market.

Other pertinent points made:

However, two randomised trials found that at around 40,000 to 60,000 units per month Vitamin D effectively became a dangerous substance.

“High doses of vitamin D or those on lower doses that increased vitamin D blood levels within the optimal range (as defined by bone specialists) had a 20-30% increased rate of fractures and falls compared to those on low doses or who failed to reach “optimal blood levels”.”

“. . . low vitamin D levels are either irrelevant or merely a marker of the disease”.

“. . . our gut microbes are responsible for producing around a quarter of our vitamins and a third of our blood metabolites and also respond to changes in vitamin levels picked up by receptors in our gut lining. Any artificial addition of large amounts of chemicals will upset some sensitive immune processes”.

Read the article published in The Conversation.

2 Responses to Vitamin D supplements are not effective, and could be dangerous, studies find

  1. Anton Lasich 24 March, 2016 at 6:40 pm #

    Please do not publish maybes or COULDS! This will reduce the authority of this website. Vitamin D3 supplementation is completely necessary in countries like the UK who are actually looking to regulate it like iodine.

    This is a maybe and could article..something I thought you stayed away from.

    Please in this sense, you are no better than these may and could natural health companies out there!

    • Harris 25 March, 2016 at 8:45 am #

      @Anton
      The UK is considering not “regulating” vitamin D, but whether to fortify with Vitamin D. This is because of the argument whether blood levels are suboptimal or ‘deficient’, and not because of any link to any disease/condition bar rickets. The subject is reasonably well discussed here.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.