I’ve just noticed something interesting in the last years research update:
ICX-TRC is a novel hair regeneration product. It consists of a suspension of
autologous dermal papilla (DP) cells. These cells are able to stimulate the generation of new hairs when injected into the scalp in close proximity to the epithelial cells which generate the hair.
It’s something they never mentioned before so possibly they tested this idea positively some time recently. I would not be surprised if the results were better on the patients where the cells were injected directly to the follicles.
It also seems to be another supporting hint for the rejuvenation theory.