With the help of sunlight, the body produces vitamin D itself. In the dark and gloomy winter months, this vitamin, which is important for the bones, can also be taken in the form of capsules or drops. The hormone produced by endogenous synthesis through our skin is calcitriol. Vitamin D3 can be stored in muscles and fat, so the body can fall back on these reserves in cloudy times.
More recently, vitamin D has also been praised for strengthening the immune system and inhibiting excessive immune reactions occurring at autoimmune diseases. In addition to protecting the nerve cells in the brain, it should also have a positive effect on the psyche.
There are currently no valid scientific studies, but it is assumed that vitamin D also has a positive effect on the cardiovascular system and blood vessels.
Adequate vitamin D supply - but please do not overdose through supplementation - is healthy in any case, so it is advisable to absorb it over the sun with short sleeves on sunny days at noon!