GET A DRIP

A mug of instant coffee was once enough to power you through the morning. Now, your second tripleshot latte barely registers. What gives? Caffeine mainly works by plugging the adenosine receptors in your brain – four and a half cups of coffee can block up to 50% of them – allowing stimulating neurochemicals such as dopamine to flood your system. When your body catches on, it responds by churning out more receptors in an attempt to restore equilibrium.