Which peptides are commonly researched for brain fog and mental clarity?

Semax and Selank are the most studied peptides for addressing brain fog and enhancing mental clarity. Semax works primarily by increasing Brain-Derived Neurotrophic Factor (BDNF) levels, which supports neuroplasticity and cognitive function. Selank modulates GABA and serotonin pathways to reduce anxiety-related cognitive impairment without causing sedation or dependency. Both peptides are administered intranasally for optimal brain delivery via the olfactory nerve.