n-acetyl cysteine replenishes glutathione The mechanism of action of N-acetylcysteine (NAC): The emerging role of H2S and sulfane sulfur species Swanson NAC N-Acetyl Cysteine, Helps

Niacin deficiency is generally rare but can occur in cases of alcoholism, prolonged use of certain drugs such as levodopa and ethionamide, and malabsorptive syndromes, such as Crohns disease, major gastrointestinal surgeries or jejunoileitis (, )

This indicates that upregulation of endogenous polyamines, especially putrescine, serves as a critical mediator in BBB injury

exceeding 800 mg EGCG daily) [345], along with an unclear safety threshold and limited evidence of exercise-related benefits, green tea-based catechin supplements may not be the best choice for athletes as antioxidants [345]

This highlights the potential of these agents as a viable therapeutic option for melasma management, addressing both aesthetic concerns and underlying hormonal factors