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If you have a weakened immune system because you have HIV or are taking immune suppressive drugs and you develop fever blisters or cold sores, talk to your doctor so they can help make sure your infection doesn't become serious
Bottom line: IV glutathione works faster because it has higher bioavailability, but for most pigmentation concerns, topical glutathione serum offers a safer and more sustainable option
Tan Y, Lu C, Jiang M, et al
BMJ open, 2020
Wang X, Chen XX, Zhou WQ, Men HB, Bao T, Sun YK, et al
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