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Neurogan GHK-Cu Hair & Scalp Serum - 4% Copper Peptides 2400mg | For Men & Women, Fast-Absorbing, Water-Based Formula for Hair Softness & Shine, Daily Use, Cosmetic Product, Made in USA Declarations Authors’ contributions Designed the paper, selected and prepared the references, prepared the figures, wrote the manuscript: Wright JW Prepared the references, wrote the manuscript: Harding JW Availability of data and materials Not applicable Content_Optimized https://livvnatural.com/wp-content/uploads/2025/08/5-amino-1MQ-no-bg-163x300.png Pack Size:30 Patches

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