Kombucha. Heard of it? Nor had I until autumn last year on a trip to San Francisco – and now this fizzy-tasting, vinegary ?live tea? drink is all anyone in the London drinks and health biz seems to want to talk about. Before we all get too excited, drinkers new to kombucha ? which incidentally is made by adding a live culture or ?scoby? to tea with sugar – should proceed with caution, as there have been some reported side effects, advises Victoria-Anne Bull, personal trainer and founder of digital wellbeing hub GreenForAllSeasons.com.