- The health ally of choice, vitamin D is essential for the proper functioning of the body, especially for bone metabolism and the immune system against bacteria and viruses. It is obtained from food (oily fish, dark chocolate, eggs, etc.) or synthesized by exposure to UV rays from the sun.
- According to ANSES, the RDA for vitamin D is 15 micrograms per day for adults. By being in the sun for 15-20 minutes at the end of the morning or in the afternoon, you provide your body with enough for the day.
Another study to confirm benefits of vitamin D… or rather the risk of running out on a daily basis. Although this vitamin, obtained from food and synthesized through the sun, is essential for the proper functioning of the body, scientists have actually discovered that its deficiency was associated with an increase in mortality. Their work was published in the journal Annals of Internal Medicine.
Increasing vitamin D levels reduces the risk of death
To reach this conclusion, a team of researchers from the University of South Australia in Adelaide conducted a ‘Mendelian randomization’ study of more than 300,000 people from the UK Biobank in the United Kingdom. This statistical method uses genetic variants to estimate the effects of external factors (through sunlight and food) on health. The aim was to assess the genetic evidence for a possible association between vitamin D deficiency and mortality, something that cannot be done in randomized clinical trials for ethical reasons.
Over a 14-year follow-up period, the researchers found that the risk of death from all causes decreased significantly as vitamin D levels increased, and vice versa. This is especially true for people who are severely deficient, meaning less than 20 nanograms per milliliter of blood (or 50 nmol/L), which is the minimum recommended by the US National Academy of Medicine. Previous studies have already shown that the deficiency doubled the risk of dying from melanomaand that regular replenishment could reduce the risk of autoimmune diseases and allowprevent tens of thousands of cancers.
In some cases, vitamin D supplementation is recommended
“Anyone with a vitamin D level below 50 nmol/L is advised to increase their intake, says scientist Elina Hyppӧnen, lead author of the study, a communicated. Our results show that it is not necessary to go very high. The positive news is that if we can meet the current recommendations, that is more than enough. According to her, “Food will definitely help, especially in the winter or if a person is not getting enough vitamin D from the sun or from places where food is not fortified with vitamin D.”
But beware overdoserare but not impossible especially for children. To avoid risk,National Food, Environmental, and Occupational Health Safety Agency (ANSES) asks health care professionals and parents to prefer medicines over food supplements, to control the doses prescribed or to limit products containing vitamin D. website.