Kate Middleton is well known for her immaculate appearance. Royal fans religiously pour over her signature look – she’s all glossy curls, glowing skin, and smoky eyes. While there’s no doubt that the Princess of Wales boasts selling power within the beauty industry, royal etiquette would dictate that she can’t officially show her allegiance to any particular product. Nonetheless, every so often rumours swirl as to what Kate Middleton’s favourite beauty products really are – lest we forget that Clarins lip gloss at Wimbledon in 2019.

There’s one product in particular that press consistently tout as Middleton’s favourite anti-wrinkle serum. Enter the Biotulin Supreme Skin Gel, £29, a face serum brimming with ‘ingredients that mimic the effects of Botox without the need for injections’ which is now on sale for £29 this Black Friday.

Said to ‘reduce muscle contractions and relax facial muscles’ the Biotulin Supreme Skin Gel is made with spilanthol, a plant-derived ingredient thought to ‘diminish fine lines caused by facial expressions.’ There’s hyaluronic acid in there too – an ingredient beloved by beauty editors for its ability to plump, hydrate and nourish.  ​Plus it’s 100% vegan too.

While we can’t verify it’s the Princess of Wales’s favourite anti-wrinkle serum for certain, the internet has been speculating that it’s been in her skincare arsenal for some time. And if there’s any chance we’ll be as radiant as Kate? Well, consider us sold.