Hi all,
I know Ray wrote about this before, but he did not provide a reference as far as I can remember. Here is a study that explains the link between tryptophan and white / grey hair. So, tryptophan depletion would be beneficial not just for lowering serotonin.
http://www.ncbi.nlm.nih.gov/pubmed/10721115
http://www.ncbi.nlm.nih.gov/pubmed/11132729
I know Ray wrote about this before, but he did not provide a reference as far as I can remember. Here is a study that explains the link between tryptophan and white / grey hair. So, tryptophan depletion would be beneficial not just for lowering serotonin.
http://www.ncbi.nlm.nih.gov/pubmed/10721115
http://www.ncbi.nlm.nih.gov/pubmed/11132729