Absolutely none at all.

I drink water, from a tap only, and nothing else at all.

I got rid of coffee and tea from my diet about 4 years ago. It was one of the best health improvements I have ever made. Instantly solved weight gain, insomnia, irritability, migranes, sickness, concentration problems and bowel problems. Felt like utter crap for about 2 months but it wore off eventually.

I could draw a direct comparison to when I broke my leg and was on large quantities of opiates. The withdrawal from this was horrible. The same with caffeine.

It's not good for you if it does this.

Now trying to get rid of sugar, which is MUCH harder.