As in, research published in a
peer-reviewed scientific journal? I think that we have to consider the overall context in which these claims are being made. Even 10 and 15 year-old promises for a legit treatment would not be that far off the mark if something is produced soon. We're living in a decade and era when not only are researchers looking at treatments for hair loss, the scientific community are saying they are on the cusp of developing cell-based and pharmaceutical treatments for hearing loss, cartilage, bone, muscle, tendon and liver repair, osteoarthritis, congestive heart failure and so on. Researchers have never really wavered from their efforts to figure out normal HF development and keratinocytes in order to better understand how cancer cells divide so rapidly.
In fact, so many peer-reviewed research papers on hair cycling have been produced that we probably shouldn't be surprised by announcements for new hair loss treatments in the near to mid term.