They are not approved by the FDA and are not drugs, foods, dietary supplements, or cosmetics
Reduced glutathione works by scavenging free radicals and preventing them from causing damage to cells and tissues
However, oral supplementation of L-arginine, the precursor for NO synthesis, has been shown to be largely ineffective at increasing NO synthesis and/or bioavailability for several reasons, which makes L-citrulline much more ideal for boosting levels of L-arginine and subsequently NO
In addition to these treatments, healthcare providers may also recommend lifestyle changes to support recovery and prevent future occurrences
It would require highly specialized, expensive chromatographic laboratory testing that is usually reserved for targeted individual investigations, not routine battalion-wide screening