Kombucha is a lightly effervescent fermented drink of sweetened black tea that is used as a functional food. It is produced by fermenting the tea using a symbiotic colony of bacteria and yeast, or "SCOBY". - Wikipedia
Have you heard of Kombucha? It's what the ancient Chinese called the “Immortal Health Elixir”. It’s been around for more than 2,000 years and has a "rich anecdotal history of health benefits like preventing and fighting cancer, arthritis, and other degenerative diseases". (foodrenegade.com)
Anecdotal means unsupported scientific evidence. I looked it up. However, nearly everything "natural" or "organic" or just plain good for you is considered "anecdotal". Natural remedies don't make Big Pharma rich. There is no money in people treating themselves.