I'm looking for good books about medical aspects in Physical Fitness and on how the body reacts on products like BCAA, creatine and so on. Can I ask this kind of questions on Physical Fitness without being attacked by downvoters? If I can't how should I pose the question?
This kind of question is not something that is accepted here. It's been tried before in the early months, and any type of list-based questions were received badly.
However, there have been answers that do reference books, but this depends entirely on asking a specific question instead of a vague, broad, give-me-everything type of question. It depends on what you want to ask so take a look at our scope and browse the site to get a better idea of what is on our site.