Coffee you love.
Sleep you need.
Most advice treats them as enemies. We think they've just been badly introduced. JavaSleep is a slow magazine about the hours between your last sip and your first dream — with honest reviews, quiet science, and one very useful calculator.
How much caffeine
will still be awake
at your bedtime?
Caffeine doesn't clock out when you do. It has a half-life of about five hours, which means your 3 PM latte is still at half strength when you're trying to fall asleep at 11. Here's the honest math.
Adjust the inputs above to see your personal timeline.
Three things worth reading slowly.
Why Obstructive Sleep Apnea Gets Worse When Your Nose Is Stuffed
There is a sentence that circulates in sleep clinics and CPAP forums, repeated with the confidence of settled fact: a stuffy nose makes sleep apnea worse.
Obstructive Sleep Apnea Treatment: One Airway, Many Doors
The pulse oximeter clipped to my finger recorded a number I did not want to see. At 3:14 a.m., my blood oxygen had dropped to 84 percent. Twelve seconds later it climbed back to 96.
Sleep Apnea and Cardiovascular Risk: What the Snoring Actually Costs Your Heart
Everyone knows the sleeper who saws logs all night and swears they slept like the dead. The snoring is treated as proof of depth — a body so thoroughly unconscious it forgets to be quiet.
“The most civilized thing a person can do is enjoy a cup of coffee at ten in the morning and still sleep at ten at night.— Editor's Note, Issue №001