I will eagerly read more about that! Could you please post references in those lines? Or expand on that?
@Gondwanaland
Good article here by Dr Ben Lynch on A1298C ( although he dosen't agree with the majority view that it reduces BH4 recycling)
http://mthfr.net/mthfr-a1298c-mutation-some-information-on-a1298c-mthfr-mutations/2011/11/30/
Dr Pall on Sauna and BH4
http://www.ncbi.nlm.nih.gov/pubmed/19581054