Steve, decaf coffee has such a low concentration of caffeine to be negligible, unless you during two pints of it.
Guarana contains caffeine, but the exact amount in that specific drink must be ascertained. The usual upper dosage advised is 300 mg/day.
Thanks for your interest and feedback. I find that on most such products there is a limited amount of information and it usually favors nutrition favorable to the businesses sales. It is more than common that the public has to rely on their own intelligence to ascertain what our the disadvantages of the products being sold. Which are sometimes offset by the governments warnings as in for instance tobacco and alcohol products.
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