Glutathione: What It Is, Why You Need It, How You Can Increase It The Amino Company We know that *glutathione* is what detoxifies NAPQI. So, why must we give its precursor, N acetylcysteine (NAC), instead of just giving glutathione directly? A. Glutathione has poor bioavailability and cannot enter the 19 Potential Benefits of Glutathione + Side Effects TSC Supplement SG 5 Potential Side Effects of Glutathione Injections Poisoning in Pregnancy Obgyn Key Glutathione Side Effects: What You Need to Know The HCG Institute