Anyone with Wilson's disease or any known copper-metabolism disorder should not use GHK-Cu at all this is the one hard contraindication, topical or injectable
Since B12 is also essential for fetal development, particularly the development of the neural tube, low B12 can increase the risk of birth defects if left unaddressed in pregnant women
Clinical Insight Single-molecule supplementation (e.g., high-dose DHA) is unlikely to yield cognitive benefits in at-risk older adults unless embedded within a comprehensive, risk-factortargeted lifestyle pattern that improves blood pressure, inflammation, insulin sensitivity, sleep, and toxin load
Its also found another medication, Birks Ang says
What is Peptide Therapy
[8] Synaptic Tagging [edit] Synaptic tags mark where synaptic plasticity has occurred and can thus provide information on synaptic strength and potential for long-term plastic changes