Another review read: "Great product ... More like a cream than a serum." The L'Oreal Paris Age Perfect Cell Renew Midnight Serum (30ml) can be bought for £15.39 on Amazon and £26.25 at Boots.

One such product? L'Oréal Paris Age-Perfect Midnight Serum, which ageless icon Jane Fonda uses as part of her nightly routine. But wait, it gets better. Right now you can get this serum at a 25% ...

The product in question is L'Oréal Paris Revitalift Laser Tripeptides Age-Correcting Serum ... However, not every review was glowing: "The serum goes on nicely and doesn't leave my skin feeling ...