Vitamin D3 + K2 · 90 Liquid Caps

Many people now know that taking vitamin D3 as a dietary supplement can be useful in our part of the world. After all, according to an analysis by the Robert Koch Institute, around 62% of Germans do not have an adequate supply of the sun vitamin. The proportion rises considerably, especially in winter and spring. This is due to the fact that the most important source is not our food, but the body's own production. Within 5 metabolic steps, cholesterol is turned into active vitamin D3, also known as 1,25-dihydroxycholecalciferol. However, our body can only carry out one of these 5 steps with the help of sunlight, or the UV-B rays it contains, whereby finished but still inactive vitamin D3 is produced in our skin from 7-dehydrocholesterol as cholecalciferol. And this step is precisely the crux of the matter. If there is a lack of UV-B rays on the skin or if the intensity is too low, no vitamin D can be produced.

Unfortunately, the intensity in our latitudes is only sufficient to produce enough vitamin D3 from March to October. The rest of the year we are theoretically dependent on our liver having produced sufficient quantities during the summer. However, even in summer, most of us spend the majority of our time indoors or in vehicles. As UV-B rays do not penetrate window glass or walls, no vitamin D is produced during this time. Studies have very demonstratively established this connection in athletes. It was found that outdoor athletes, such as track and field athletes, are significantly less likely to have a vitamin D deficiency during the summer than indoor athletes, such as weightlifters or bodybuilders. Yet vitamin D is immensely important for our health.