Even the promise of stronger, healthier hair could never quite tempt me to use products as opposed to cutting it. Until now …

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here are few brands one can credit with having changed the beauty game, but the launch of Olaplex just over a decade ago invalidated the assertion that the only way to fix damaged hair is to cut it.

It used a patented ingredient (the unpronounceable bis-aminopropyl diglycol dimaleate) to strengthen and rebuild all types of hair bonds ravaged by bleach, colour and other chemical or heat treatments.

Having looked at bonds under a microscope, I think it’s easiest to think of them as tiles on a roof: when they’re in good nick, they’re even, smooth and regular; when not, more jagged, missing and letting in rain.