I know most of the forum discussion about hair centres on loss, rather than greyness, but I am quite sure this somewhat odd story will be of interest to many.
It might also be seen to pick up on the mention the other day of using immunosuppressive medicines against Hashimoto's.
Cancer patients' grey hair unexpectedly darkens in drug study
Spanish study suggests side effects of new immunotherapy drugs may include restoring hair pigment
A group of cancer patients’ grey hair has unexpectedly darkened after they took new types of drugs, researchers have revealed.
Chemotherapy is known to make patients’ hair fall out, but the 14 people involved were all being treated with new immunotherapy drugs that work differently and have different side effects from chemotherapy. A Spanish study suggests those may include restoring hair pigment, at least in patients with lung cancer.
More at link:
theguardian.com/science/201...
Link to abstract in JAMA Dermatology: