Yesterday afternoon I added a bottle of Perfect Water Focus to my fast. This is a great oxygenated water that has recently added vitamins, natural flavoring and green tea to the product line. I drank the one with the green tea and consumed about 5 mgms of caffeine. Great product for focus, however, I know now that caffeine and my body do not get along at all. I was awake until 3:00am and had a jittery, low blood sugar feeling. Something I’ve not had during the last 5 days of fasting. So, during this fast I’m able to see how my body reacts to certain nutrients and chemicals when they are re-introduced to my diet. Caffeine, I can live without. The original Perfect Water will be the next test.