A few years ago Desmond Tobin, professor of cell biology at the University of Bradford (UK), came to the conclusion that there is a kind of "biological clock" in the hair root follicle that can slow down or even stop completely. the activity of melanocytes that make pigment for our hair, causing it to turn gray or white. The good news is that these same melanocytes could be reactivated and the process reversed , as has been proven in experiments on cancer patients who, after receiving radiotherapy treatment, regained their old hair color. According to Jonathan Rees, a professor of dermatology at the University of Edinburgh, the key is in the melanocortin 1 receptor , which controls the relationship between eumelanin – the basis for dark hair – and pheomelanin , that of blonde or red hair, within the follicle.
On the other hand, experts from the universities of Manchester, in the United Kingdom, and of Lubeck, in Germany have found a method that makes the gray hair of relatively "young" subjects return to its natural state after they have appeared gray. as a consequence of some type of illness or due to situations of intense stress . For this they have used a molecule called K (D) PT , very similar to melanin.
