Off phase: 4 months pause
If copper peptides work well for you, pick one high-quality product and use it consistently rather than layering multiple copper sources
Nature Reviews Endocrinology , 16 (3), 135-146
For most people, a Vitamin C + Glutathione serum offers the best balance of safety, effectiveness, and long-term results for pigmentation and uneven skin tone, while IV glutathione should remain a specialist-led treatment for selected cases

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