Caffeine is the most consumed psychoactive compound in the world. Even if you don’t drink coffee or tea, you probably still regularly consume caffeine since it’s found in everything from fizzy drinks and cold remedies to decaf coffee and chocolate.

When caffeine is consumed, it’s rapidly absorbed by the body – reaching peak effects within two hours (though it may take up to nine hours to leave your body). It’s also water and fat soluble, so it gets into all body tissues, which explains why caffeine can affect many different parts of the body.

It’s recommended that adults consume no more than 400mg of caffeine a day (approximately four cups of coffee). More than this may lead to muscle tremors, nausea, headaches, pounding heart and even death (in extreme cases).

But even people who only consume a couple cups of coffee or tea daily may feel it still has adverse effects – such as irritability, difficulty falling asleep and feeling jittery. This is why a growing number of people are deciding to give up caffeine.

If you’re thinking about giving up caffeine and are wondering what benefits it may have, here’s what the research says:

Caffeine withdrawal can cause headaches, fatigue and tiredness. This is because the body develops a tolerance to caffeine.

Caffeine binds to a receptor in the brain used by adenosine. The binding of caffeine to these receptors causes the body to delay the onset of fatigue. But over time the........

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