Kate Middleton's rumoured anti-ageing serum hits Prime Day sale saving shoppers £10

Shoppers are getting a great deal on a product rumored to be Kate Middleton's favorite anti-ageing serum, Biotulin Supreme Skin Gel, during a Prime Day sale. This isn't just a beauty trend; it's a nod to the influence royals have on consumer habits. The sale offers a £10 discount, making it a hot buy for those looking to try out the product linked to the Princess of Wales. It's a smart move for brands capitalizing on celebrity endorsements, but it also highlights the broader trend of people seeking out rumored favorite products of public figures.