I think the hair loss is different for different people. Some lose some don't I haven't noticed a difference in my hair either way. I have a friend who said her hair felt thicker and grew faster when she started Atkins. As for vitamins I think a multi vitamin is good. I also take coq10, acidophilus, alpha lipoic acid and a b complex vitamin. You should do your own research and decide what you think will work best for you. Dr A has a written about this in most if not all of his books.