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The medication is typically injected once weekly on the same day

Budget and Resources: While oral forms might seem cheaper initially, reduced bioavailability could mean needing more compound overall to achieve the desired effect

Primary research: Anxiety, cognitive enhancement, immune modulation Mechanism: Enhances GABA signaling, increases BDNF expression, modulates enkephalin metabolism Administration: Intranasal for rapid absorption Regulatory status: Returned to Category 1 compounding status in February 2026 For the full research breakdown, see our Selank peptide benefits guide