the rest is mechanistic reasoning that a clinician should weigh individually: Known copper or peptide allergy the most concrete contraindication, explicit enough that clinical researchers screen it out (NCT07437586)
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Strength testing: Manual muscle testing, handheld dynamometry, isokinetic testing
For Semax and Selank, the honest answer is that long-term neuroplasticity effects in humans are simply unknown, because the research has not been done
The concentrations were measured using Tunable Resistive Pulse Sensing (TRPS) from Izon Sciences