Update 4/7/24. Does Viviscal help thinning hair grow thicker and stronger or is it a scam? Viviscal is one of the best-known hair growth supplements. And for good reason. There are several clinical studies on this dietary supplement. In this review, you will learn about the research on ViviScal to help you decide if it really works or not. In addition, I'll address the side effects some people …