{"id":69406,"date":"2025-12-05T15:39:38","date_gmt":"2025-12-05T14:39:38","guid":{"rendered":"https:\/\/www.beautydecoded.com\/produits\/non%20class\u00e9\/ultra-pure-high-potency-serum-15-hyaluronic-acid\/"},"modified":"2025-12-05T15:39:53","modified_gmt":"2025-12-05T14:39:53","slug":"ultra-pure-hyaluronic-acid-1-5-serum","status":"publish","type":"product","link":"https:\/\/www.beautydecoded.com\/en\/products\/kiehls\/ultra-pure-hyaluronic-acid-1-5-serum\/","title":{"rendered":"Ultra Pure Hyaluronic Acid 1.5% Serum"},"content":{"rendered":"

AQUA<\/a>, GLYCERIN<\/a>, SODIUM HYALURONATE<\/a> (Hyaluronic acid), PHENOXYETHANOL<\/a>, CHLORPHENESIN<\/a>, Tetrasodium glutamate diacetate<\/a>, CITRIC ACID<\/a><\/p>\n

My Doctor's Diagnosis: Analysis and Target<\/h2>\n

Visit Ultra Pure Hyaluronic Acid 1.5% Serum<\/strong> Kiehl's is primarily intended for skin that lacks moisture, is prone to dehydration, tightness, or loss of radiance. This serum aims to restore and maintain optimal skin hydration, making it ideal for dry, combination, or even dehydrated oily skin. Kiehl's minimalist formulation is an asset here, as it limits the risk of intolerance and maximizes the effectiveness of the moisturizing active ingredients.<\/p>\n

Formula Analysis: Key Assets<\/h2>\n

I note three major active ingredients in this serum:<\/p>\n

    \n
  • Hyaluronic acid (Sodium Hyaluronate)<\/strong> This star ingredient acts like a molecular sponge, capable of retaining up to 1,000 times its weight in water. It intensely hydrates the skin, plumps fine lines, and improves skin suppleness.<\/li>\n
  • Glycerine<\/strong> : A powerful humectant, it draws water into the outer layers of the skin, strengthening the skin barrier and preventing imperceptible water loss.<\/li>\n
  • Purified water<\/strong> : It acts as a carrier for active ingredients, ensuring a light texture and good tolerance.<\/li>\n<\/ul>\n

    The synergy of these active ingredients gives the product remarkable moisturizing effectiveness, while respecting sensitive skin thanks to a refined formula.<\/p>\n

    Tips and Application Ritual<\/h2>\n

    I recommend applying this serum in the morning and\/or evening, on clean, slightly damp skin, before your moisturizer. It is compatible with most active ingredients (niacinamide, vitamin C, peptides). However, I would avoid layering it immediately with very acidic or exfoliating products to preserve the integrity of the skin barrier.<\/p>\n

    My Final Verdict & Safety Opinion<\/h2>\n

    This Kiehl's serum stands out for its simplicity, high tolerance, and effectiveness in moisturizing. Its light texture absorbs quickly without feeling sticky. The only possible downside is the lack of additional active ingredients to target other issues (deep wrinkles, dark spots). In conclusion, it is an excellent choice for safely moisturizing and plumping the skin.<\/p>\n

    ","protected":false},"excerpt":{"rendered":"

    The Verdict & Review beautydecoded:
    Dry skin: Avoid
    Oily skin: Very good
    Anti-aging effectiveness: Low
    Effectiveness on blemishes: Very good \u2b50
    Effectiveness Hyperpigmentation: Low
    Effectiveness on redness: Very poor \u274c
    Sensitive skin: Not suitable \u26a0\ufe0f<\/p>","protected":false},"featured_media":69418,"comment_status":"open","ping_status":"open","template":"","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":""},"product_brand":[],"product_cat":[747],"product_tag":[],"class_list":["post-69406","product","type-product","status-publish","has-post-thumbnail","product_cat-kiehls","pa_type-de-produit-serum","first","instock","product-type-external","entry","content-bg","loop-entry"],"acf":[],"taxonomy_info":{"product_cat":[{"value":747,"label":"Kiehl's"}],"pa_type-de-produit":[{"value":544,"label":"serum"}]},"featured_image_src_large":["https:\/\/www.beautydecoded.com\/wp-content\/uploads\/2025\/12\/3-100.jpg",700,700,false],"author_info":[],"comment_info":0,"_links":{"self":[{"href":"https:\/\/www.beautydecoded.com\/en\/wp-json\/wp\/v2\/product\/69406","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.beautydecoded.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.beautydecoded.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.beautydecoded.com\/en\/wp-json\/wp\/v2\/comments?post=69406"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.beautydecoded.com\/en\/wp-json\/wp\/v2\/media\/69418"}],"wp:attachment":[{"href":"https:\/\/www.beautydecoded.com\/en\/wp-json\/wp\/v2\/media?parent=69406"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.beautydecoded.com\/en\/wp-json\/wp\/v2\/product_brand?post=69406"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.beautydecoded.com\/en\/wp-json\/wp\/v2\/product_cat?post=69406"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.beautydecoded.com\/en\/wp-json\/wp\/v2\/product_tag?post=69406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}