biotin
Minoxidil-Free, Biotin-Free: The Let It Thrive Philosophy
The philosophy behind Let It Thrive: no minoxidil, no biotin, no prostaglandins — a quick look at each, with links to the full evidence.
Does Biotin Work for Hair? An Honest Look at the Evidence
Biotin's hair-growth reputation outpaces the evidence. Here's what the research actually shows, and what Let It Thrive uses instead.