Research suggests that glutathione taken orally is not well absorbed across the GI tract. A study of acute oral administration of a very large dose (3 grams) of oral glutathione found that it is not possible to increase the circulation of glutathione in a clinically relevant way. However, glutathione concentrations can be raised by increased intake of the precursor "cysteine".
Cysteine is taken like N-acetyl L-cysteine (NAC). Reported side effects from taking NAC are: blurred vision, nausea and vomiting.
"Ask a Doctor" questions are answered by certified physicians and other medical professionals.
For more information about experts participating in the "Ask a Doctor" Network, please visit our
medical experts page.
You may also visit our Alternative Medicine , for moderated patient to patient support and information.
The information provided on eHealth Forum is designed to improve, not replace, the relationship between a patient and his/her own physician.
Personal consultation(s) with a qualified medical professional is the proper means for diagnosing any medical condition.