{"product_id":"hydration-serum-4-weight-hyaluronic-acid","title":"Hydration Serum with 4 Weight Hyaluronic Acid","description":"\u003cp\u003eUse for sustained, layered hydration from the surface inward. Delivers four molecular weights of hyaluronic acid — each reaching a different depth. Works in every skin type, in every season, without fragrance or active-ingredient risk. Single-weight HA hydrates one layer. This formula is built around four.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThe Ingredients:\u003c\/b\u003e Purified Water, Sodium Hyaluronate (High Molecular Weight), Sodium Hyaluronate (Medium Molecular Weight), Sodium Hyaluronate (Low Molecular Weight), Hydrolyzed Sodium Hyaluronate (Ultra-Low Molecular Weight), Glycerin, Panthenol, Allantoin, Hydroxyethylcellulose, 1,2-Hexanediol, Ethylhexylglycerin.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCompare to:\u003c\/b\u003e Drunk Elephant B-Hydra Intensive Hydration Serum (1.69 fl oz) — $48\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThe Science Details:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eMulti-depth hydration architecture — high MW stays at the surface; low MW reaches the living epidermis; ultra-low reaches deeper still.\u003c\/p\u003e\n\u003cp\u003eSurface plumping — surface HA binds water at the stratum corneum for an immediate, visibly plumper look.\u003c\/p\u003e\n\u003cp\u003eWater retention — the multi-weight blend holds moisture across more than one layer of the skin.\u003c\/p\u003e\n\u003cp\u003eUniversal tolerance — no actives with sensitization risk; suited to compromised, post-procedure, and reactive skin.\u003c\/p\u003e\n\u003cp\u003eTargets a real gap — single-weight HA serums treat hydration as a surface matter. Multi-weight treats it as a layered one.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRead the Research\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC3583886\/\"\u003ePapakonstantinou et al. 2012, Dermato-Endocrinology (review)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/22052267\/\"\u003ePavicic et al. 2011, Journal of Drugs in Dermatology (study)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC6010840\/\"\u003eBukhari et al. 2018, Saudi Pharmaceutical Journal (review)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWhy This Product Works\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eHyaluronic acid is a well-studied humectant, and its behavior is molecular-weight dependent. Size determines where it sits in the skin: high molecular weight (above 1,000 kDa) forms a hydrating film at the surface for immediate plumping; medium weight sits in the upper layers; low weight (below 50 kDa) reaches the living epidermis; ultra-low reaches deeper still.\u003c\/p\u003e\n\u003cp\u003eMost serums use a single molecular weight — usually high or medium, because they are easier to formulate and the surface plumping is immediately perceptible. The benefit of low-weight HA appears more gradually, over weeks rather than the day of application. This serum uses all four because hydration is not a single-layer matter.\u003c\/p\u003e\n\u003cp\u003eThere are no other actives in this formula. That is deliberate. The Hydration Serum is built to be the most universally tolerable product in the range — suited to a compromised barrier, post-procedure skin, reactive types, and any time introducing an active is not appropriate. Simplicity here is a feature.\u003c\/p\u003e\n\u003cp\u003eA note on expectations: apply to slightly damp skin — not wet, not fully dry — and follow immediately with a cream or oil to seal it in. Applied to dry skin in a dry environment without an occlusive layer, humectants like HA can draw moisture from the deeper skin rather than the air, which works against the intended effect. The sequence matters.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWhat's not in it:\u003c\/b\u003e No fragrance, no alcohol, no silicones, no actives with sensitization potential.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSuggested use:\u003c\/b\u003e Apply to damp skin — HA works by binding water, so water needs to be present for it to bind. Follow with a moisturizer to seal it in. In low humidity (air travel, winter air, anywhere heated), reapply as needed.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eManufacturer's country | Product amount:\u003c\/b\u003e USA | 1 fl oz\u003c\/p\u003e","brand":"Sorrel \u0026 Co","offers":[{"title":"Default Title","offer_id":48108395495678,"sku":"FMN0HYAL","price":42.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/4379\/3918\/files\/sorrel-hydration-serum-4-weight-hyaluronic-acid-1.jpg?v=1780156847","url":"https:\/\/sorrel.skin\/products\/hydration-serum-4-weight-hyaluronic-acid","provider":"Sorrel \u0026 Co","version":"1.0","type":"link"}