is it better to take glutathione or nac vs. NAC: Which Antioxidant Best for Your Liver? NAC (N-Acetyl Cysteine)
Description
In contrast to the reversibly hyperoxidized cysteine sulfenylated proteins, irreversibly hyperoxidized sulfonylated cysteine is generally thought to be an impaired dead end product (e.g., inactivated protein) formed through protein aggregation 25

doi: 10.3109/15563650.2011.639713

Niacinamide (20,000ppm) paired with Vitamin C reduces melasma and refines pores for a radiant, glass-skin finish

The color directly indicates copper coordination status
