Caffeine is one of the most widely consumed psychoactive substances in the world due to its stimulant effects. As a central nervous system stimulant, caffeine works by blocking adenosine receptors in the brain which promotes increased alertness. Pure caffeine supplements come in powder, capsule or tablet form and allow consumers to precisely control their caffeine intake levels. Many ... https://www.coherentmarketinsights.com/industry-reports/energy-supplements-market