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Evidence-based guideline: treatment of painful diabetic neuropathy: report of the American Academy of Neurology, the American Association of Neuromuscular and Electrodiagnostic Medicine, and the American Academy of Physical Medicine and Rehabilitation
If you're using a strong retinoid, be especially cautious about adding copper peptides

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Much like Vitamin C, even Vitamin E is a potent antioxidant, which shields the melanocytes against oxidative stress and damage
