Does caffeine dehydrate you?

Caffeine does not dehydrate the body. Although it has mildly diuretic properties, the water consumed along with it balances out the fluid excreted during urination.

Even though caffeine does not cause dehydration, drinking too much can cause the same symptoms. The most common is a headache, which can be avoided by drinking a lot of water.

Drinking too much caffeine does have some side effects. As a stimulant it could cause insomnia if consumed later in the day. Caffeine can lead to attacks of anxiety and irritability that often lead to a crash after it has been excreted from the body.