Does anyone know what B complex vitamins do for you? If they help you lose weight and with hair and

builds stamina among other things

Does anyone know what B complex vitamins do for you? If they help you lose weight and with hair and nails?

B complex will acctually increase your appetite, but it does enormous feats for hair and nails. it makes your hair strong and shiny, and strenghthens your nails. i don't use a chemical b-complex pill, but i use pills called : brewers yeast, which i get from an organic drugstore. but there shouldn't be any difference