Can a fizzy drink do you good?

They claim to benefit your gut, and boost your mind and body. So which fall flat — and which sparkle?

FROM a nettle drink that promises to reduce blood pressure to a sparkling kefir — a fermented drink — that claims to improve your mood, MANDY FRANCIS

asked Ruth Kander, a dietitian at Fleet Street Clinic in London, to assess some of the newest ‘healthy’ drinks on the market. We then rated them…