These are too expensive, but I have tried every supplement out there over the years for my hair. I want the thickness back I had when I was younger and optimal growth, and have taken regular Biotin for 30 years. I've been on these for 4 months and am just seeing my hair thickening and a tiny bald spot is filling in, and Minoxidil wouldn't even work on the bald spot. I didn't think anything would as I burned it with a styling appliance. I don't see faster growth, but the Lustriva must make the difference as skeptical me is seeing results.