What is the 15 rule for coffee?
It’s the ultimate coffee cheat code: ☕15 months – green beans are freshest within this window. The Rule goes like this: Green coffee lasts about 15 months before it goes stale. Roasted coffee lasts about 15 days before it goes stale. Ground coffee lasts about 15 minutes before it goes stale.
What is the 2 hour coffee rule?
Quick answer: the 2 hour coffee rule suggests waiting at least two hours after waking up before drinking your first cup of coffee. This guideline aligns with the body’s cortisol levels, aiming to optimize both the effects of caffeine and the body’s natural wakefulness cycle. According to emerging research in circadian biology and neuroscience, waiting about 90 minutes before having caffeine can improve focus, mood, and nighttime sleep quality. It’s not about giving up your morning brew — just about timing it to align with your body’s natural cortisol rhythm.Adenosine levels are lowest as you wake up, but they build throughout the day. As more adenosine attaches to its receptors, the interaction promotes a cascade of sleep-promoting effects. Caffeine blocks adenosine receptors, meaning adenosine can no longer attach to help promote sleepiness, says Gatlin.