Is it possible to combine vitamins from fat B, Omega 3 and Biotin?

Yes, but you need to keep the time interval. Omega is a fat-soluble drug. Therefore, it is best to take the drug during the most abundant meal, which will improve the assimilation of the drug and to avoid gastrointestinal ailments. Biotin and B vitamins are water-soluble vitamins, so it's best to take after a meal and drink water. It's hard for me to say about the drug for the proper functioning of the liver, because I do not know exactly what drug we are talking about. I add a link to preparations for the liver where you can get acquainted with the dosage of the drug that you have: https://www.gdziepolek.pl/kategorie/watroba