Semax is a synthetic peptide primarily valued for its cognitive enhancement and neuroprotective effects.  It boosts focus, memory, learning, and mental clarity by increasing Brain-Derived Neurotrophic Factor (BDNF), which supports neuron survival, growth, and synaptic plasticity.  Semax enhances attention, motivation, and mental stamina without causing jitteriness or crashes, making it ideal for managing brain fog, ADHD symptoms, burnout, or cognitive recovery after trauma. It also improves cerebral blood flow and has anti-inflammatory and neuroprotective properties, supporting long-term brain health. 
Selank is a synthetic peptide renowned for its anxiolytic (anti-anxiety), mood-stabilizing, and immune-modulating benefits.  It promotes calmness and emotional resilience by modulating the GABA system, serotonin, and dopamine, without causing sedation.  Selank helps reduce stress, anxiety, and mood swings, and supports overall mental well-being. It also enhances immune function, protects the gastric lining, and may aid in recovery from opioid or alcohol dependence. 
Both peptides are often used together in a complementary protocol: Semax for mental sharpness and focus, and Selank for emotional balance and stress reduction.  They are typically administered via nasal spray or subcutaneous injection, and are considered safe for long-term use under medical supervision, with minimal side effects such as mild nasal irritation or rare headaches.