Has anyone heard of KEVIS?

I`m still lossing hair at the top of my head. My hair is pretty long but i`m still lossing a little hair. I just want to cover the little area of scalp i can see. I don`t have medical problems, nor thyroid problems. I`m not stressed nor sick in any way. Can anyone tell me what kind of results they`d had with these products? Viviscal, tall grass shampoo, hair topia, silica, biotin, nourishair, msm? Which one is the best and where can i find them? Thanks
Bye the way, has anyone ever used Kevis? Does it work?