copper peptide ghk-cu skin clinical study randomized Before and After Pictures – Neurogan Health and rejuvenate with GHK What Lab Research Actually Shows
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The nutrition value of these (carbohydrates, proteins, amino acids, and lipids) contents of some pollen types varies between species (186, 187)

AHK-Cu, by comparison, has been studied less extensively for skin applications

Journal of Tissue Engineering 15:20417314241303818

International Ice Hockey Federation, Zrich IIHF (2018) IIHF Official Rule Book 20182022
Peptide-based multi-agonists: a new paradigm in metabolic pharmacology
For bigger doses, like 2000 mcg, you need 2 mL