In the United States, the FDA categorizes glutathione as "Generally Recognized as Safe" (GRAS) for the general population
Instead, scientists have estimated their adequate intake, which is similar to the RDA, but based on weaker evidence
Electrophysiological recordings further supported this, revealing that Dihexa caused a 1.6-fold increase and Nle-AngIV caused a 1.7-fold increase in the frequency of AMPA-mediated mEPSCs compared to vehicle-treated neurons, indicating an expansion of functional synapses without altering individual synapse properties such as amplitude, rise, or decay times
However, amino acid analogs are unsuitable for clinical use due to their low affinity, lack of specificity, and toxicity 87
doi:10.1164/rccm.200209-1112OC
Use daily for consistent results