{"id":246269,"date":"2026-09-14T10:02:25","date_gmt":"2026-09-14T08:02:25","guid":{"rendered":"https:\/\/www.parisselectbook.com\/?p=246269"},"modified":"2026-09-14T10:02:29","modified_gmt":"2026-09-14T08:02:29","slug":"anti-aging-serum-bestseller-sephora","status":"publish","type":"post","link":"https:\/\/www.parisselectbook.com\/en\/2026\/09\/14\/anti-aging-serum-bestseller-sephora\/","title":{"rendered":"This anti-ageing serum under \u20ac20 is the number one bestseller at Sephora US"},"content":{"rendered":"

Under \u20ac20 for a skincare product beloved by millions of Americans: Merit’s Great Skin Instant Glow serum<\/a> has climbed to the top of the bestseller charts at Sephora US, and it’s now landing in France with the same all-in-one anti-ageing<\/a> promise.<\/p>\n

A bi-phase formula that became a Sephora US staple<\/h2>\n

Behind this success lies an original formula: the serum is bi-phase, meaning its two layers separate when left to rest and need to be combined by shaking the bottle before each application. This simple step ensures the formula performs at its best every time you use it, and it’s precisely this design that helped turn it into a cult product<\/a> at the beauty giant.<\/p>\n

Merit created this serum to address several skin concerns that emerge with age<\/a>: loss of bounce, a dull complexion, and redness. Rather than targeting just one of these issues, the brand chose to tackle all three in a single product, available for under \u20ac20 at Sephora.<\/p>\n

A formula designed for mature and sensitive skin<\/h2>\n

What sets this serum apart, first and foremost, is its gentleness. Dermatologically tested and fragrance-free, it has earned the quality seal of the National Eczema Association. This is a product designed for skin that becomes more delicate over time, not just for those looking to correct visible signs of ageing.<\/p>\n

The formula is built around four different hyaluronic acid molecules, capable of penetrating multiple layers of the skin to deliver 24-hour hydration. Alongside these, 2% niacinamide<\/strong> works to brighten the complexion and refine skin texture. Two further actives complete the picture: cocoa seed extract, whose caffeine stimulates blood circulation for an immediate plumping effect, and Japanese golden thread root, recognised for its soothing properties against redness and its antioxidant protection.<\/p>\n

The serum has a lightweight, non-greasy texture that absorbs quickly without leaving any residue on the surface. It primes the skin for makeup while working just as well on its own.<\/p>\n

What the clinical study says about results<\/h2>\n

The effects of this serum aren’t built on marketing promises alone. A clinical study conducted over 4 weeks<\/strong> with 34 participants<\/strong> provides concrete data. Here are the key results observed:<\/p>\n

    \n
  • 100%<\/strong> of participants noticed a more radiant complexion after just 2 weeks of daily use.<\/li>\n
  • 91%<\/strong> saw a visible reduction in redness after 4 weeks.<\/li>\n
  • 100%<\/strong> felt the serum soothed their skin and made it more comfortable.<\/li>\n
  • 97%<\/strong> observed visibly smoother, plumper, and more luminous skin with improved texture.<\/li>\n<\/ul>\n

    These figures, drawn from a consumer study, give a clear picture of what users can expect, particularly in terms of how long it takes to see the first results.<\/p>\n

    How to work it into your daily beauty routine<\/h2>\n

    Using this serum follows a straightforward logic. Apply it after cleansing and before your moisturiser, morning and evening if desired. Its gentle formula makes it suitable for twice-daily use, even on the most delicate mature skin.<\/p>\n

    For the right amount, 2 to 3 pumps<\/strong> are enough to cover the entire face. Massage in gently to encourage absorption. Thanks to its non-greasy texture, it leaves no residue and can double as a base before makeup. This makes it a particularly practical choice in the morning, when time is short.<\/p>\n

    Available at Sephora for under \u20ac20, Merit’s serum offers a value proposition that’s hard to overlook for anyone seeking a clinically validated, all-round anti-ageing treatment suited to sensitive skin.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Under \u20ac20 for a skincare product beloved by millions of Americans: Merit’s Great Skin Instant Glow serum has climbed to the top of the bestseller…<\/p>\n","protected":false},"author":8,"featured_media":246270,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[110],"tags":[3609],"quartier":[],"class_list":["post-246269","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-beauty","tag-sephora-en"],"acf":[],"yoast_head":"\nThis anti-ageing serum under \u20ac20 is the number one bestseller at Sephora US<\/title>\n<meta name=\"description\" content=\"Merit's Great Skin Instant Glow serum is the top-selling anti-ageing serum at Sephora US, and it's now available in France for under \u20ac20.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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