How much caffeine is in Red Bull, Starbucks, coffee, tea, soda? - Business Insider - 1 views
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John Evans on 26 Jun 17"And you thought Red Bull was bad. It turns out that while a can of the energy drink has 80 milligrams of caffeine, a small cup of Starbucks drip coffee has more than three times that amount. Since many beverages don't show their caffeine content, it can be tough to make sure you're not overdoing it - and the Mayo Clinic advises adults to limit their caffeine intake to 400 mg per day. More than that and you run the risk of unpleasant side effects ranging from migraine headaches to irritability, upset stomach, and even muscle tremors"