Is glutathione really bad for those with thyroid problem? My doctor has been telling me ever since to avoid it, but somehow I don't believe her.

Glutathione. Are you taking it oral or iv? in Filipines, women have been using it to whiten their skin as it blocks melanin production. It takes a great oral dose to have detectable blood levels and can cause skin rashes, diarrhea, headaches, itchiness, chills and acne breakouts. We have no idea what "thyroid problem" you have, but Glutathione use can lead to serious complications (believe it or not).