A hand with painted nails holds a lid over a jar on a gray surface. - Irada Zaitova/Shutterstock ...

Caffeine intake per day was estimated based on standardized volumes for each beverage (cola, 220 mL; tea, 237 mL; coffee, 45 mL) and by summing the caffeine content of each drink based on previously ...

This is the product's overall performance score, based on key tests conducted by our industry experts in the CHOICE labs.