I have taken the L-Glutathione from magic potions, 250mg of each capsule, I didn't even take it on a regular daily basis, sometimes I forget and skip a day or two. But it worked fine for my skin, got clearer, fairer, fresher. My body also did not show any negative reaction. If you research on glutathione it is a super antioxidant which the cells in our body needs. After consuming the first batch of 60 tablets, I bought again another set, with a higher dosage, different brand - 1,000 mg, once a day Vit-Immune Glutathione. I chose to buy it because its a lot cheaper - $32 for once a day as compared with the $45 magic potion 250mg which is needed twice a day. I'm on my first week with the new brand, and I think it's also working just as fine. I'm from the Philippines, so don't be amazed at the cheap prices.

There is no negative side effects for overdosage of glutathione because any excess is excreted in the urine, though the health advisor told me 1000mg is the highest I should deal with. Hope this helps.