Re: Can hypothyroid cause grey hairs?

Thanks HV, your information is very useful.

BTW, since L-Tyrosine is an amino acid, do I have to cycle its usage i.e not take it for more than 3 months at a time?

Also, I've read PABA (Para-Amino benzoic acid ) can also restore hair to normal colour but can be damaging to the liver in the long term (6+ months usage).

Is this true? Tweet