How much is coffee okay for me to drink each day?
For caffeinated coffee, stick with three to five 8-ounce cups of regular-strength java you make at home, or no more than 20 ounces of coffee-shop joe, which can be stronger. That should keep your daily caffeine intake to about 400mg or less, the level experts say is safe for most adults.
This is also enough to reap the health benefits associated with coffee (including decaf), such as a lower risk of type 2 diabetes and possibly certain cancers. But note that for some people, coffeine can woesen incontinence, tempararily increase heart rate or blood pressure slightly, or cause jitters and anxiety. And as caffeine’s effects can last for up to 7 hours, it can affect sleep.