Unfortunately, it is not properly clarified for vitamin D3 that the combination with vitamin K2 (MK7) is necessary for it to work. That is: Without it, calcium does not move into the bones and remains in the vessels, gradually causing calcification. Especially for those dealing with osteopenia or osteoporosis. Of course, D3 is necessary for everyone since sun exposure no longer ensures the sufficient amount we need. Additionally, it helps regulate metabolism and the immune system. Most importantly, D3 is fat-soluble. This means that at mealtime there MUST be a small amount of good fats, such as: 1 teaspoon of raw olive oil or 5-6 olives or an egg or a few raw nuts, such as 7 almonds or two walnuts or a little feta or graviera cheese or a bit of avocado. Taking vitamin D3 on an empty stomach or without these fats is a significant mistake, as the vitamin does not dissolve and is expelled directly, passing through the stomach and intestine, losing its active substance.
Also, reading some comments, it is clear that there is misinformation. Do not confuse people with unfounded claims about hormonal disorders or nervousness, which have no scientific basis. Finally, since the supplement contains 2000 IU, it is good for everyone to consult their doctor for the individual dosage that suits them.