Methylxanthines

Methylxanthines are naturally occurring chemicals found in substances like coffee, tea, and cacao. They are stimulants that affect the central nervous system, helping to increase alertness and reduce fatigue. The most common methylxanthines include caffeine, theobromine, and theophylline. These compounds work by blocking certain signals in the brain that promote sleep and relaxation, resulting in increased wakefulness and energy. Methylxanthines can also have other effects, such as improving mood or dilating airways, but consuming them in excess may lead to side effects like insomnia or jitters.