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Advanced routine with retinoids For those using prescription or over-the-counter retinoids alongside copper peptides

Avoid self-medication or overdose

These aggregated substances may increase the risk of formulation instability and potential sensitization

If you are prone to skin sensitivities, choosing a brand that prioritizes purity can significantly lower your risk of adverse reactions

10.1038/nm.3893 [DOI] [PMC free article] [PubMed] [Google Scholar] 198.Lopez-Castejon G, Brough D

Therefore, we suggest that our case report may contribute to the formation of standardised desensitisation protocol in vitamin B12 allergy