For instance, an average 8-oz cup of brewed decaf coffee contains about 2 mg of caffeine. Cold brew. A 2017 study found that a 12-oz cup of cold brew coffee can contain between 153–238 mg of ...

Drinking more than 28 cups of coffee a week – keeping in mind that a cup is 6 to 8 oz. – is associated with a higher risk of death in people under 55, according to a new study published in the ...