Britons are in disbelief over the key ingredient in lemon wax

Lemons are one of the most versatile citrus fruits out there, loved for their sour juice and fragrant zest. While they are a staple ingredient found in most kitchens, one thing many people overlook about this yellow fruit is exactly what’s used to give it the signature waxed finish. And the answer is very surprising.

Known as a popular drink garnish, cooking ingredient and natural cleaning remedy, there are few things lemons can’t be used for.

And while many people choose to buy waxed lemons for their lower price tag, the substance used on the yellow skin has shocked Britons.

In an episode of Channel 4’s Food Unwrapped which saw the team venture to Thailand, viewers finally discovered exactly what’s responsible for the shiny rind.

On their travels, presenters Kate Quilton and Matt Tebutt learnt that the citrus wax contains shellac – known more simply to beauty fans as a type of nail polish.

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Shellac is a glaze-like substance derived from the hardened, resinous material secreted by the lac insect – much like honey from a bee.

Kate made the discovery while visiting Thailand, where she joined a group of workers searching for trees that contain shellac.

The presenter was given a demonstration by her host, Tomas, who revealed exactly how they gather the ingredient for citrus wax.

While cutting off a large branch which was covered in lac insect nests, he explained that the bugs spend the duration of their life sucking sap from the trees.

According to a food expert at Vegomm, it’s not just lemons that use shellac wax. They said: “All citrus (oranges, grapefruits etc.) from throughout the world (probably an industry standard) are either shellac based or contain shellac within the wax mix”.

But those considering unwaxed alternatives may be shocked to know that there is a hefty price difference between the two.

A pack of four unwaxed lemons in Morrisons cost £1.15, while their waxed “Wonky” counterparts retail for just 55p. In Tesco, a four-pack of waxed lemons costs £1.35, with the unwaxed version costing £1.80 for a pack of three.

It should also be noted that unwaxed fruits have a shorter shelf life as they don’t have the same protection against moisture loss and postharvest decay.