As part of the trial, participants applied a cream comprised of 0.1% C4-GSH, 0.5% beta-glycyrrhetinic, and 10% azelaic acid to affected areas of the skin once daily for a total of 8 weeks
Those votes are recommendations rather than rules, the FDA still has to complete a formal public rulemaking process, and none of it is the same as FDA approval

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Staff, Arnold Schwarzenegger: Made in Britain Archived August 17, 2010, at the Wayback MachineBritish Film Institute
It is a tightly regulated reaction that depends on both the availability of the amino acids (cysteine, glycine, and glutamate) and the rate-limiting enzyme, glutamate-cysteine ligase ( GCL )