can glutathione darken skin for Dark Spots numbuzin No.5 Glutathione Dark Spots

The problem is that glutathione itself cannot be taken orally

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The treated mushrooms packaged in PET (polyethylene terephthalate) boxes and wrapped with PVC (polyvinyl chloride) before being stored for 0 to 14 days at 2C with 80% relative humidity

It's a risk that's just not worth taking when valid data is on the line