I've cycled for years with no hair issue. I've run Test, Deca, NPP, Mast, Primo, Var, Tren, etc. with no hair issues. Then just recently in the last year, I'm starting to thin out! My 4 brothers all have a full head of hair. My dad has a full head of hair. My granddad died with a full head of hair. This sucks! LOL I'm on fina and 2% nizorel shampoo and it's still thinning. My head's not nice and round so I look like a Neanderthal when I shave. It won't be long before I'll be a buff Neanderthal. LOL