How long can caffeine suppress melatonin production?

Caffeine can suppress melatonin production for an extended period, with research indicating that it can affect melatonin levels for up to 10 hours after consumption. Melatonin is a hormone that helps regulate sleep-wake cycles, and its production is generally highest during the night. Caffeine, being a stimulant, can disrupt this natural cycle by blocking adenosine receptors, which play a crucial role in promoting sleepiness. This interaction means that caffeine consumption, especially later in the day, can lead to delayed melatonin release, thus impacting the body’s ability to prepare for sleep. The duration of suppression varies among individuals based on sensitivity to caffeine and the amount consumed, but studies support the idea that the suppressive effects can last around 10 hours for many people.