We tend to think of libido as a switch. It’s inherent in the language we use – are you turned on, or off? – and the premise of the growing category of “libido-boosting” supplements for women in the billion-dollar vitamin industry .

But is activating desire really as simple as taking a pill? Do any of them actually work? And, most importantly, are they safe to use?

Is there such thing as an aphrodisiac?

From oysters and figs to chocolate-dipped strawberries and chilli, many foods have been considered aphrodisiacs throughout history.

But Clare Collins, laureate professor in nutrition and dietetics at the University of Newcastle, says there is little evidence that any food can have a direct effect on libido.

A 2014 review of 20 botanical compounds claimed to be sexual enhancers found

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