Depends on what you: mean by 'seriously.' There are basically 2 major ingredients that can cause problems - sugar and caffeine. Too much caffeine in sensitive people can cause anxiety, insomnia, rapid heart rate and even heart rhythm disturbances, and physical dependency where stopping suddenly causes irritability and severe headache. Sugar is major contributor to obesity, with diabetes and heart disease as a result.
Answered 9/13/2020
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A doctor has provided 1 answer
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