Whilst the NHS notes that taking up to 2,000 micrograms daily is unlikely to cause harm in most people, there is generally no benefit to consuming such excessive amounts unless treating confirmed deficiency under medical supervision
The two peptides share the copper-tripeptide structure, so a degree of read-across is biologically reasonable but "GHK-Cu does X, therefore AHK-Cu does X" is an inference, not a finding
Experienced researchers on SeekPeptides consistently report that measurement precision is the single biggest factor in getting consistent results from their protocols
Most protocols recommend 8 to 16-week cycles followed by a 4 to 8-week break
These injections are good for those with certain deficiencies or needing more nutrients
If you define the longevity of result by the length of time until a patient has another similar procedure, then an eyelid lift is as near to permanent a result as possible