In the winter period, the human body often suffers from a deficiency of certain vitamins. This is due to the absence of a large number of seasonal vegetables and fruits. Therefore, in such cases, it is worth looking for these vitamins in available products, monitoring blood indicators, and not forgetting about additional intake of vitamins. RBC-Ukraine, based on a post by dietitian Tetiana Lakusta on Instagram, explains which vitamins are most often needed by a person. Vitamin B12 Taking metformin, Helicobacter pylori infection, drugs to reduce acidity, chronic alcohol consumption, veganism, b…