The sleep Foundation article examines how alcohol consumption affects sleep quality and, consequently, brain health and cognitive performance. While alcohol may initially promote sleep by inducing drowsiness, it disrupts sleep architecture by reducing rapid eye movement (REM) sleep and causing sleep fragmentation, leading to non-restorative rest. Chronic alcohol use can result in persistent sleep disturbances, which are linked to cognitive impairments such as memory deficits and decreased executive function. To enhance brain health, it is advisable to limit alcohol intake, especially in the hours preceding bedtime, to preserve sleep quality and support optimal cognitive function. The article is based on current scientific understanding and provides practical guidance for individuals seeking to improve their sleep and brain health.