Slender Me Medical on Instagram: "Day 17 of 30: Peptides 101 Semax nasal spray Semax is a synthetic peptide originally developed in Russia and commonly used in nasal spray form to support cognitive and neurological function. It is a modified fragment of adrenocorticotropic hormone (ACTH) that does not carry hormonal activity. Semax has been studied for its potential role in supporting memory, focus, learning capacity, stress resilience, and mood by influencing neurotrophic factors such as BDNF a