As you would assume, better embryo quality is associated with higher pregnancy rates
An interaction with the dopamine system has already been noted for many known peptides (neurotensin, CCK, etc.)
Adults above 40 : Overpower age-related decline in glutathione, combating oxidative stress for energy
Antiviral effect by activating TLR7 response to IFN-1: NAC could contribute to the prevention or control of infections caused by RNA viruses, since the drug amplifies the signaling functions of TLR7 and the mitochondrial antiviral signaling protein (MAVS) in the production of IFN-1
For example, many supplements contain caffeine, which acts as a diuretic and eliminates fluid from your body, per the NIH
While results can last with ongoing care, they are not permanent