#caffeine

Stylised coffee cup with a water-droplet outline overlapping it, showing equal fill levels
Myth vs FactHydration

"Coffee dehydrates you"

At normal intake, coffee's mild diuretic effect is offset by its own fluid volume — a controlled trial found no hydration difference between coffee and water drinkers.

Myth
Stylised brain outline made from overlapping coffee-bean and grain shapes
ScienceCaffeine & Stimulants

Best Foods and Drinks for Focus

Most 'brain food' content is aesthetic. This is the actual evidence on caffeine, glucose, and attention.

Meta-analysis
Stylised coffee cup with a clock face dissolving into it, illustrating caffeine's half-life
ScienceSleep & Recovery

Does Caffeine Affect Sleep? The Half-Life Problem

Caffeine's half-life is longer than most people plan around — here's the trial that measured a 6pm coffee's effect on sleep at midnight.

Single RCT