Regulations could tighten, restricting access, or relax, enabling broader legitimate use
NAC has been used clinically for decades as an FDA-approved drug for acetaminophen overdose (where it replenishes hepatic glutathione) and as a mucolytic agent [18]
The reason is pharmacological synergy
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The single largest barrier to delivering its proven biological effects on intact skin is the stratum corneum
Gao Y, Wang T, Cheng Y, Wu Y, Zhu L, Gu Z, Wu Y, Cai L et al (2023) Melatonin ameliorates neurological deficits through MT2/IL-33/ferritin H signaling-mediated inhibition of neuroinflammation and ferroptosis after traumatic brain injury