As of October 2015, caffeine comparison charts are on websites for the University of Utah, the Center for Science in the Public Interest and Mayo Clinic. The university chart displays many types of foods and beverages, including coffees, teas, cocoa, energy drinks, brand-name soft drinks, chocolate and frozen yogurt.
The Center for Science in the Public Interest presents separate caffeine comparison charts for several coffee brands, teas, soft drinks and energy drinks. In addition, CSPI has charts for caffeinated snacks, ice cream and yogurt, chocolate products, caffeine pills and pure caffeine. Mayo Clinic's charts cover general coffee and tea drinks, brand-name sodas and energy drinks, candies and over-the-counter medications.