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Injecting unregulated GHK-Cu purchased online introduces risks of heavy metal contamination and copper toxicity that far outweigh the theoretical benefits
Contraindications remain somewhat speculative given limited human data
Maintaining healthy lifestyle habits and getting professional support can reduce this rebound effect and help preserve more of your progress over the long term
Using over-the-counter products for skin lightening can worsen the condition, as most cases need specialised treatment
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