they are not well known everywhere, in particular not in places where vitamin supplements are not commonly used. also overdosing on vitamins can be risky. that'

they are not well known everywhere, in particular not in places where vitamin supplements are not commonly used. also overdosing on vitamins can be risky. that's why it is important to explain what these are for, and also the expected effect, so that someone taking them can judge whether that is what they need and also ask better questions and explore alternatives to achieve the desired outcome