Caffeine consumption, even in the morning, is often the invisible factor that degrades sleep quality and fragments sleep, rendering other lifestyle hygiene techniques ineffective.

noli's read

Science confirms that caffeine acts as an antagonist to adenosine receptors, a molecule that promotes sleep pressure. A meta-analysis published in 'Sleep Medicine Reviews' confirms that caffeine consumption, even six hours before bedtime, significantly reduces total sleep duration and rest efficiency. Genetic variability, particularly via the CYP1A2 gene, effectively explains why some individuals metabolize caffeine much more slowly than others, thereby prolonging its stimulant effects beyond the day. While the impact on deep sleep is documented by several observational and clinical studies, the idea that even a small morning cup destroys sleep for everyone is a generalization, as tolerance and metabolic rate vary greatly from one individual to another. The community on this thread strongly converges toward an enthusiastic consensus, sharing positive experiences marked by an improvement in sleep continuity after stopping the stimulant.

the sources

1. 1Gardiner C et al. 2023
2. 2r/sleep