glutathione acetyl S-Acetyl L-Glutathione, 100 mg, 60 Capsules tree nuts S-Acetyl L-Glutathione Powder

The variation comes from factors that have little to do with the product itself

3b) shows less amplification in this B region compared to the eumelanin sample

Thats a serious sign

A recent study entitled Elevation of glutathione as a therapeutic strategy in Alzheimers disease concludes: Increasing glutathione remains a promising therapeutic strategy to slow or prevent MCI and Alzheimers disease. Considering that glutathione levels continue to decline as we age, and that both AD and MCI increase with age, supplementation with effective glutathione can play an important role in prevention, or slowing the progression of this disease