glutathione plant sources and Brain Health: What It Is, Sources, And Benefits Frontiers | Plant Glutathione Biosynthesis:

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In sport, both are on the World Anti-Doping Agency prohibited list

Repeated injections of DSIP in a 35-year-old male narcoleptic investigated the effects of the neuropeptide on these very symptoms and concluded that DSIP reduced the frequency of daytime sleep attacks and increased the individual's daytime performance in terms of overall alertness and activity

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These include: Eggs Nuts Legumes Lean proteins Cruciferous vegetables Flaxseed Milk thistle Whey Guso seaweed However, if you develop a glutathione deficiency, obtaining it from your diet isnt optimal