Supplements are a multi-billion dollar industry. But, unlike pharmaceutical companies, manufacturers of these products don’t have to prove that their products are effective, only that they are safe – and that’s for new supplements only.
We wanted to know which supplements are worth our attention (and money) so we asked six scientists – experts in everything from public health to exercise physiology – to name a supplement they take each day and why they take it. Here is what they said.
Simon Bishop, lecturer in public health and primary care, Bangor University
Turmeric is more familiar as an ingredient in South Asian cooking, adding an earthy warmth and fragrance to curried dishes, but, in recent years, it has also garnered attention for its potential health benefits. I have been taking ground turmeric root as a dietary supplement for around two years, but I have been interested in its use in Ayurvedic medicine for far longer.
Turmeric is used as a traditional remedy in many parts of Asia to reduce inflammation and help wounds heal. Now, mounting evidence suggests that curcumin, a substance in turmeric, may also help to protect against a range of diseases, including rheumatoid arthritis, cardiovascular disease, dementia and some cancers.
The evidence underpinning these claims of health-giving properties is not conclusive, but it is compelling enough for me to continue to take turmeric each morning, along with my first cup of coffee – another habit that may help me live a bit longer.
Graeme Close, professor of human physiology, Liverpool John Moores University
Vitamin D is a peculiar vitamin in that it is synthesised in our bodies with the aid of sunlight, so people who live in cold countries, or who spend a lot of time indoors, are at risk of a deficiency. People with darker skin tone are also more at risk of vitamin D deficiency as melanin slows down skin production of vitamin D. It is estimated that about a billion people are deficient in the vitamin.
Most people are aware that we need enough vitamin D to maintain healthy bones, but, over the past few years, scientists have become increasingly aware of other important roles of vitamin D. We now believe vitamin D deficiencies can result in a less efficient immune system, impaired muscle function and regeneration, and even depression.
Vitamin D is one of the cheapest supplements and is a really simple deficiency to correct. I used to test myself for deficiencies, but now – because I live in the UK where sunlight is scarce between October and April, and it doesn’t contain enough UVB radiation during these cold months – I supplement with a dose of 50 micrograms, daily, throughout the winter. I also advise the elite athletes that I provide nutrition support to, to do the same.