I was trying a modified version of the methylation protocol (modified because I'm in the uk so getting supplements can be trickier and I'm not rich). NAC produced such an improvement that I bought a (semi-recumbent) exercise bike and was beginning to exercise for 90 seconds a time. However I have developed an itchy rash and had this for weeks. My gp believes it to be pityriasis rosea but I haven't had a virus, I'm a lot older than the usual age range and it's been all over my body including hands, feet and sometimes face. It's not on my palms or soles and it's not a bullseye Lyme rash. It starts as itchy red spots that develop outwards to leave a pale centre and red circle or horseshoe shape then fade but others develop. At night the rash often fades. I'm taking loratidine or cetirizine twice a day and using a steroid cream when the itching is still bad. I've stopped the supplements for a time without the rash going but would like to restart NAC. Any advice welcomed.