{"id":41049,"date":"2025-11-07T11:57:02","date_gmt":"2025-11-07T11:57:02","guid":{"rendered":"https:\/\/mostincrediblevalue.com\/beauty\/index.php\/product\/kiehls-since-1851-ultra-pure-high-potency-serum-5-0-niacinamide-1-oz\/"},"modified":"2025-11-07T11:57:03","modified_gmt":"2025-11-07T11:57:03","slug":"kiehls-since-1851-ultra-pure-high-potency-serum-5-0-niacinamide-1-oz","status":"publish","type":"product","link":"https:\/\/mostincrediblevalue.com\/beauty\/index.php\/product\/kiehls-since-1851-ultra-pure-high-potency-serum-5-0-niacinamide-1-oz\/","title":{"rendered":"Kiehl’s Since 1851 Ultra Pure High-Potency Serum 5.0% Niacinamide 1 oz."},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"

What It Is:A concentrated 5% Niacinamide serum for oily skin made with only 10 ingredients that visibly reduces excess oil and shine.What It Does:With 5% Niacinamide, this serum is formulated with just 10 ingredients to help visibly reduce excess oil and minimize the look of redness. Free of fragrance and colorants, this concentrated serum is minimally formulated for skin absorption and efficacy.How To Use It:In the morning and evening, apply 2-3 drops to clean, dry skin.Clinical Results:- After<\/p>\n","protected":false},"featured_media":0,"comment_status":"closed","ping_status":"open","template":"","meta":[],"product_brand":[],"product_cat":[284,282,283,570],"product_tag":[194],"class_list":["post-41049","product","type-product","status-publish","product_cat-cosmetics","product_cat-health-beauty","product_cat-personal-care","product_cat-skin-care","product_tag-kiehls-since-1851","first","instock","product-type-external","add-to-wishlist-after_add_to_cart"],"yoast_head":"\nKiehl's Since 1851 Ultra Pure High-Potency Serum 5.0% Niacinamide 1 oz.<\/title>\n<meta name=\"description\" content=\"Kiehl's Since 1851 Ultra Pure High-Potency Serum 5.0% Niacinamide 1 oz. - What It Is:A concentrated 5% Niacinamide serum for oily skin made with only 10 ingredients that visibly reduces excess oil and shine.What It Does:With 5% Niacinamide, this serum is formulated with just 10 ingredients to help visibly reduce excess oil and minimize the look of redness. Free of fragrance and colorants, this concentrated serum is minimally formulated for skin absorption and efficacy.How To Use It:In the morning and evening, apply 2-3 drops to clean, dry skin.Clinical Results:- After\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mostincrediblevalue.com\/beauty\/index.php\/product\/kiehls-since-1851-ultra-pure-high-potency-serum-5-0-niacinamide-1-oz\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kiehl's Since 1851 Ultra Pure High-Potency Serum 5.0% Niacinamide 1 oz.\" \/>\n<meta property=\"og:description\" content=\"Kiehl's Since 1851 Ultra Pure High-Potency Serum 5.0% Niacinamide 1 oz. - What It Is:A concentrated 5% Niacinamide serum for oily skin made with only 10 ingredients that visibly reduces excess oil and shine.What It Does:With 5% Niacinamide, this serum is formulated with just 10 ingredients to help visibly reduce excess oil and minimize the look of redness. Free of fragrance and colorants, this concentrated serum is minimally formulated for skin absorption and efficacy.How To Use It:In the morning and evening, apply 2-3 drops to clean, dry skin.Clinical Results:- After\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mostincrediblevalue.com\/beauty\/index.php\/product\/kiehls-since-1851-ultra-pure-high-potency-serum-5-0-niacinamide-1-oz\/\" \/>\n<meta property=\"og:site_name\" content=\"Health & Beauty\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-07T11:57:03+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/mostincrediblevalue.com\/beauty\/wp-content\/uploads\/2023\/11\/12744730_fpx.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"300\" \/>\n\t<meta property=\"og:image:height\" content=\"375\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/mostincrediblevalue.com\\\/beauty\\\/index.php\\\/product\\\/kiehls-since-1851-ultra-pure-high-potency-serum-5-0-niacinamide-1-oz\\\/\",\"url\":\"https:\\\/\\\/mostincrediblevalue.com\\\/beauty\\\/index.php\\\/product\\\/kiehls-since-1851-ultra-pure-high-potency-serum-5-0-niacinamide-1-oz\\\/\",\"name\":\"Kiehl's Since 1851 Ultra Pure High-Potency Serum 5.0% Niacinamide 1 oz.\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/mostincrediblevalue.com\\\/beauty\\\/#website\"},\"datePublished\":\"2025-11-07T11:57:02+00:00\",\"dateModified\":\"2025-11-07T11:57:03+00:00\",\"description\":\"Kiehl's Since 1851 Ultra Pure High-Potency Serum 5.0% Niacinamide 1 oz. - What It Is:A concentrated 5% Niacinamide serum for oily skin made with only 10 ingredients that visibly reduces excess oil and shine.What It Does:With 5% Niacinamide, this serum is formulated with just 10 ingredients to help visibly reduce excess oil and minimize the look of redness. 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