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Description
In general, it is assumed that the two main limiting factors are the levels of cysteine and of the enzyme gamma-glutamyl-cysteine synthetase (also known as glutamate-cysteine ligase)

Nakazono-Kusaba A, Takahashi-Yanaga F, Morimoto S, Furue M, Sasaguri T

However, all of the published human studies have used R,S -lipoic acid (racemic mixture)

There have been hints that some of these behavioral-health-related waivers may be coming to an end
