There have been reports of adverse effects from drinking the tea, ranging from upset stomach to toxic reactions and metabolic acidosis (excessive acid buildup in the body). The FDA cautions that home-brewed versions are at high risk of contamination. In 1995, the CDC issued a report linking kombucha with the illness of a woman suffering from metabolic acidosis.” – WebMDThere is even a recorded case of a death that resulted from home-made Kombucha.