Electrolyte lemonade to probiotic pop: do functional drinks really work?

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They make grand claims about beauty benefits or extra energy – and even actor Gillian Anderson has her own brand. We investigate what they’re really doing – and put them to a taste test

Show yourself some love. Fuel your focus. Life’s too good for bad energy. Find your calm in the everyday chaos. Live fit. No, not new-age slogans or something you’d find scribbled in neon on the wall of a cocktail bar, but marketing taglines slapped across cans of functional soft drinks. Walk into any supermarket or newsagent and there they are, bright and cheerful, right next to the Tango, promising everything from improved mental clarity and zen-like calm, to a blast of highly caffeinated energy as part of your sandwich-and-a-snack lunchtime meal deal. Influencers love them. Your favourite podcasters are sponsored by them. Even Gillian Anderson has a functional drinks brand (brilliantly, she’s called it G Spot).

If you have not yet swigged an electrolyte-loaded lemonade or opened a can of probiotic fizzy pop, you might be wondering what functional drinks even are. Because they are marketed as having one or more of many possible physiological and cognitive benefits, it’s a big category. There are functional drinks for focus, productivity, relaxation, calm, protein, energy, gut health and perhaps most confusingly, for hydration – which is, after all, the core function of most potable liquids.

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