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Cutis 2007;79:119-22

Key point: The formal list in 21 CFR 216.23 is different from FDAs Category 1 list of nominated substances under evaluation

In research models, the peptide has been shown to recruit alternative vessel networks to bypass damaged or occluded primary vessels

It's an ambiguity acknowledged by the review's authors, who state that more research is needed to clarify optimal amounts and to identify "sub-groups of individuals most likely to respond to particular nutrients or foods." Speaking with a doctor is your best first-line action to determine whether you could benefit from swapping dietary glutathione for a supplement, or vice versa