Health experts have warned there is a small risk of side effects with some people experiencing rashes, vomiting and jaundice.
There are also fears that the tea can become toxic if it is stored in ceramic containers that leach chemicals into the liquid.
Experts claim that the high numbers of bacteria give the immune system an energy boost, which helps the body get rid of harmful toxins.
Although the health benefits have not been scientifically proven, many regular drinkers claim to have been cured of ailments including arthritis pain, indigestion, kidney stones, eczema and insomnia.
It has also been credited with helping treat more serious illnesses such as cancer, high blood pressure and even improving failing eyesight.
The tea is thought to boost the body’s metabolism, which can help weight loss – some people claim to have shed as much 30lb.
“Until more is known about both the health benefits and harmful effects surrounding this type of tea, consumption should be viewed with caution,” the Daily Mail quoted Emma Williams of the British Nutrition Foundation as saying.
“There is little scientific evidence available in the literature to support the beneficial effects of this tea,” she said.