Did you know?
Vitamin D3 (cholecalciferol) is the most important physiological form of vitamin D in the human organism. With the help of sufficient UVB radiation from sunlight, the body can produce vitamin D3 in the skin. In food, vitamin D3 is mainly found in oily fish. However, if there is no sun exposure, the concentration is usually not sufficient to cover the vitamin D requirement through food alone. Depending on the part of the year, vitamin D deficiency can occur in more than 50% of the population in Germany (February and March). Vitamin D deficiency can be a risk factor for bone disorders, Parkinson's disease and sleep disorders, among others, and can have an adverse effect on muscle disorders, infections, inflammatory diseases, high blood pressure, type 1 and type 2 diabetes and cardiovascular disease.
Vitamin K2 (menaquinone) is required in the body, among other things, for the synthesis of prothrombin, which is the most important enzyme in the blood clotting process. In a healthy body, vitamin K2 is partly formed by the bacteria in the intestinal flora, which can provide about half of the vitamin K requirement. In food, vitamin K2 is mainly found in egg yolks, dairy products and meat. Vitamin K comes in different forms, such as MK-4 (phylloquinone) and MK-7 (menaquinone-7). The bioavailability of the forms varies greatly and the MK-7 form, which has the best bioavailability, is about 10 times higher than the MK-4 form. Therefore, the daily vitamin K requirement can be covered with a relatively small amount of menaquinone-7. A vitamin K deficiency can lead to blood clotting disorders and increase the risk of bone fractures.
The combination of vitamin D3 and K2 is particularly useful because, according to some scientific studies, there seems to be a mutual dependence of the two vitamins. There is evidence that taking a high dose of vitamin D3 with a simultaneous vitamin K deficiency can have a negative effect on bone health. Only if the body is adequately supplied with vitamin D and K at the same time can it be guaranteed that the calcium metabolism functions normally and that the calcium is transported to the right places in the body.