Caffeine Capsules

Caffeine – Central Nervous System Stimulant for Cognitive and Physical Performance Research Caffeine is a well-known central nervous system (CNS) stimulant that has been extensively studied for its effects on alertness, energy metabolism, endurance, fat oxidation, and cognitive performance. Found naturally in coffee beans, tea leaves, cacao, and certain plants like guarana, caffeine remains one of the most widely researched psychoactive substances in both clinical and laboratory settings. Mechanism of Action Caffeine works primarily by acting as an adenosine receptor antagonist—blocking the inhibitory neurotransmitter adenosine from binding to its receptors (A1 and A2A) in the brain. This inhibition leads to increased dopaminergic and noradrenergic activity, resulting in heightened wakefulness, improved focus, and mood elevation. Additionally, caffeine indirectly promotes epinephrine (adrenaline) release, contributing to its effects on endurance, thermogenesis, and alertness. Key Resea