23 Of The Best Hydrating Serums For Plump, Glowing Skin
By Tracey Achonwa / 19 January 2026
Dr Kentley doubles down on this but only if there are certain ingredients at certain concentrations. “A well-formulated hydrating serum is valuable as it delivers water-binding ingredients such as hyaluronic acid and glycerin, at higher concentrations than are usually offered by most moisturisers. These molecules act like microscopic sponges, drawing water into the upper layers of the skin and holding it there, leaving a plump and glowy appearance to the skin.”
