Coffee is one of the healthiest beverages on the planet. However, not everyone can drink coffee. For some people, the caffeine can cause problems. For these individuals, decaf is an excellent way to enjoy coffee without the side effects of too much caffeine. Decaf coffee is not completely caffeine free. It actually contains varying amounts of caffeine, usually about 3 mg per cup. So, even if decaf is not completely caffeine free, the amount of caffeine is usually very small. Usually caffeine is removed using The Swiss Water process. Decaffeinated coffee has most of the same health benefits as regular coffee, but none of the side effects. Decaf usually contains similar amounts of antioxidants as regular coffee and one cup of brewed decaf coffee provides 2.4% of the recommended daily intake of magnesium, 4.8% of potassium, and 2.5% of niacin, or vitamin B3.