Glutathione (GTH) is an essential amino acid found in every cell in the body. Healthy individuals who have reached age 80 or more all have very high levels of glutathione in their blood. Persons with elevated levels of GTH in their body stay healthy, while persons with hypertension, arthritis, heart disease, and diabetes all have low levels of GTH. To keep our Glutathione levels high eat many cruciferous vegetables, which contin glutathione. These include Brussels sprouts, cauliflower, broccoli, cabbage, kale, bok choy, watercress, and rutabagas. These same vegetables contain indole-3-carbinol that inactivates estrogen. This may explain why persons eating these vegetables have a lower incidence of cancer of the breast, prostate, lungs, esophagus, bladder, and especially the colon.
N-acetyl cysteine ad whey protein may also help the body manufacture GTH. GTH is composed of three amino acids; glycine, glutamic acid and csyteine. Taking 600 mg daily of n-acetyl-cysteine has been shown to increase bloodplasma levels of glutathione by 38%. Also be sure your multivitamin contains ribofacin (B2), selenium, zinc, and magnesium. All have a role in proper GTH metabolism.
A urine test can be done to determine your level of free radical damage by testing your 8-Hydroxy-2-deoxyguanosine levels. If this level is determined to be high then your body is failing to control the rate of formation of free radicals. Taking additional antioxidants would then be recommended to increase your protection.