Shiseido, Histogen and Organ Tech.
Histogen, for the reasons David stated; Shiseido, because they're in phase II and have a potential means of stopping hairloss; Tsuji, because he easily has the most solid science on his side and his team is the only one growing new follicles with the treatment on track for commercialization.
I don't think Brotzu's lotion will wind up doing anything near the level people are hoping it will and everything else is either a drug or the concept is sketchy at best.
We don't fully understand how many diseases we have cured, or developed effective treatments for, work.
What diseases have we cured that we don't understand? We have treatments for many diseases we don't fully understand, but I can't think of any disease we don't understand that we have a cure for.
