Niacinamide can help fade dark spots over time by reducing excess pigment production and supporting a more even skin tone
39 Intracellular GSH has been shown to play an important role in aspects of T-cell function, including the binding, internalization, and degradation of interleukin-2, as well as DNA synthesis
The advantages of each, as well as when they might be most useful in your daily routine
Prevention of Oxidative Stress-Related Damage Glutathiones ability to mitigate oxidative stress extends to protecting cardiovascular tissues from injury
Research dose/evidence: Some cosmetic studies show Acmella extract (the source of spilanthol) improves wrinkle appearance, but there are fewer large clinical trials than for retinoids or peptides (there never are with botanical extracts)
But if you already have low blood pressure, its best to speak with your doctor before starting either, and especially if you plan to take them together