You definitely feel a change in a week drinking kombucha because the first few days there’s a huge reaction because your body is not used to the potency of the drink. The blueberry Kefir as well has helped my digestion, I’m world’s different than what I was Immune system and digestive system. Everything was smooth And everything is clean Because of the kombucha. As a former football player and as a basketball player I tend to work out 3 to 4 times a week I used to have to drink eight Gatorade’s to quench my thirst and for added energy. Since I’m on beetiful kombucha, I only need one bottle for a whole days workout which saves money.