{"product_id":"amino-acids-b5-the-ordinary-usa","title":"Amino Acids + B5","description":"\u003cdiv class=\"product-description-us\"\u003e\n\u003cdiv\u003e\u003cstrong\u003eWhat does The Ordinary Amino Acids + B5 do?\u003c\/strong\u003e\u003c\/div\u003e\n\u003cp\u003eThe Ordinary Amino Acids + B5 is a high-concentration, ultra-thin clinical serum meticulously engineered to deliver fundamental hydration and structural support to the skin's natural moisture barrier. Unlike traditional hydrating serums that rely solely on surface humectants, this advanced formula utilizes a potent 17% (by weight) solution of amino acids and amino acid derivatives. Amino acids are the vital building blocks of the skin's own Natural Moisturizing Factors (NMF), which are responsible for maintaining the stratum corneum’s hydration, plasticity, and enzymatic activity. By mimicking the skin's biological composition, this aqueous serum works in perfect harmony with your skin's natural processes to reinforce barrier resilience and provide immediate, weightless softening. The formula is further fortified with a 5% concentration of Pro-Vitamin B5 (Panthenol), which offers both surface-level and deeper hydrating properties while simultaneously acting as a soothing agent to mitigate visible irritation. The result is a measurably smoother, more supple, and better-protected complexion that feels completely natural and non-greasy. Its \"ultra-thin\" consistency ensures rapid absorption, making it an ideal \"hydration booster\" that can be integrated into any existing clinical routine without pilling or weight. Available for fast US delivery at theordinaryusa.co.\u003c\/p\u003e\n\n\u003cdiv\u003e\u003cstrong\u003eWhy The Ordinary Amino Acids + B5 is a US Skincare Essential\u003c\/strong\u003e\u003c\/div\u003e\n\u003cp\u003eIn the diverse and often extreme climates of the United States, the skin's moisture barrier is under constant assault from regional environmental stressors. For American consumers living in high-altitude or arid desert regions like the Southwest (Arizona, Nevada, Utah), the low atmospheric humidity can rapidly siphon moisture from the skin, leading to chronic dehydration and a \"tight\" feeling. Conversely, in major US metropolitan hubs such as New York City, Chicago, or Atlanta, the prevalence of indoor climate control—heating in the winter and air conditioning in the summer—creates a localized environment of \"recycled\" dry air that compromises the skin's barrier integrity regardless of the outdoor weather. The Ordinary Amino Acids + B5 is a US essential because it provides a \"bio-identical\" solution to these challenges. Its ultra-lightweight, non-comedogenic nature is perfect for the fast-paced American lifestyle, absorbing in seconds and sitting comfortably under makeup or high-SPF sunscreen. Whether you are battling the freezing winds of a Northeast winter or the intense heat of a Southern summer, this serum acts as a critical hydration foundation, ensuring your skin remains resilient, hydrated, and polished in any zip code. It directly addresses the US demand for minimalist yet clinically potent skincare that supports the skin's biological health without unnecessary additives.\u003c\/p\u003e\n\n\u003cdiv\u003e\u003cstrong\u003eKey Benefits of The Ordinary Amino Acids + B5\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBio-Identical Hydration:\u003c\/strong\u003e Utilizes a 17% concentration of amino acids that reflect the natural composition of the skin’s own moisture-retaining system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Depth Moisture Support:\u003c\/strong\u003e 5% Pro-Vitamin B5 provides immediate surface hydration while supporting moisture retention in the deeper outer layers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Barrier Reinforcement:\u003c\/strong\u003e Strengthens the skin’s natural defenses against environmental dehydration, pollutants, and urban irritants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Lightweight \"Thin\" Texture:\u003c\/strong\u003e An aqueous formula that absorbs instantly with zero residue, ideal for layering or for those who dislike heavy serums.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImmediate Skin Softening:\u003c\/strong\u003e Noticeably improves skin suppleness and texture from the very first application for a polished look.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-Comedogenic \u0026amp; Oil-Free:\u003c\/strong\u003e Water-based and free from oils and silicones, making it safe for acne-prone, oily, and combination skin types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalms Visible Irritation:\u003c\/strong\u003e Pro-Vitamin B5 acts as a soothing agent to reduce the appearance of redness and surface sensitivity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimizes Routine Performance:\u003c\/strong\u003e Preps the skin surface for better absorption of subsequent treatments, acting as a high-performance \"primer.\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Concentration Efficacy:\u003c\/strong\u003e Delivers professional-grade levels of active ingredients for visible, science-backed results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduces Transepidermal Water Loss:\u003c\/strong\u003e Helps the skin lock in moisture more effectively by sealing the gaps in the lipid barrier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Versatility:\u003c\/strong\u003e A fundamental hydration layer that is effective for all US skin profiles, including the most sensitive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSustainably \u0026amp; Ethically Formulated:\u003c\/strong\u003e A 100% vegan and cruelty-free formula that meets the highest US clinical standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv\u003e\u003cstrong\u003eKey Ingredients and The Science Behind Them\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cstrong\u003e17% Amino Acid Solution (and Derivatives)\u003c\/strong\u003e\u003c\/div\u003e\n\u003cp\u003eThe core science of this serum revolves around the high-potency concentration of amino acids, which constitute approximately 40% of the skin’s Natural Moisturizing Factors (NMF). These molecules, including Arginine, Aspartic Acid, Glycine, and Alanine, are responsible for maintaining the osmotic balance within the skin cells and ensuring the stratum corneum remains flexible. In clinical dermatology, amino acids are recognized not only as humectants that draw water into the skin but also as critical regulators of pH and skin barrier maintenance. Our 17% concentration is significantly higher than that found in standard moisturizers, providing an intensive boost of these biological building blocks. By reinforcing the skin's NMF, the serum ensures that the skin doesn't just \"feel\" hydrated, but is functionally better at retaining its own moisture against external stressors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cstrong\u003e5% Pro-Vitamin B5 (Panthenol)\u003c\/strong\u003e\u003c\/div\u003e\n\u003cp\u003ePro-Vitamin B5, also known as Panthenol, is a highly effective humectant that excels at attracting and binding atmospheric moisture to the skin. Beyond simple hydration, Panthenol is scientifically documented for its ability to support the skin's natural repair processes. It acts as a precursor to pantothenic acid, a component of Coenzyme A, which is essential for cellular energy and the synthesis of barrier lipids. At a 5% concentration, it provides a synergistic effect with the amino acids, creating a \"moisture cushion\" on the skin surface that helps to soothe redness and promote a more resilient, healthy-looking complexion. Its inclusion ensures that the \"ultra-thin\" formula still delivers a powerful punch of skin-comforting hydration.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\u003cstrong\u003eSpecifications Table\u003c\/strong\u003e\u003c\/div\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003eAmino Acids + B5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eThe Ordinary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFormat\u003c\/td\u003e\n\u003ctd\u003eUltra-Thin Aqueous Serum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKey Actives\u003c\/td\u003e\n\u003ctd\u003e17% Amino Acids (and derivatives), 5% Vitamin B5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH Level\u003c\/td\u003e\n\u003ctd\u003eApproximately 6.75 - 7.25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTargets\u003c\/td\u003e\n\u003ctd\u003eDehydration, Texture, Barrier Support, Softening\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuited To\u003c\/td\u003e\n\u003ctd\u003eAll Skin Types (Ideal for Dehydrated or Oily Skin)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e30mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVegan \/ Cruelty-Free\u003c\/td\u003e\n\u003ctd\u003eYes \/ Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUS Availability\u003c\/td\u003e\n\u003ctd\u003eOfficial US Store — theordinaryusa.co\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cdiv\u003e\u003cstrong\u003eHow to Use The Ordinary Amino Acids + B5\u003c\/strong\u003e\u003c\/div\u003e\n\u003cp\u003eBecause of its unique \"ultra-thin\" consistency, proper application and layering are essential to maximize results:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eCleanse:\u003c\/strong\u003e Start with a clean, dry face. We recommend the Squalane Cleanser for a lipid-preserving start.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApply:\u003c\/strong\u003e Dispense 3-4 drops into your palms or directly onto the face. Because the formula is very thin, it spreads easily—a small amount covers the entire face and neck.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTiming:\u003c\/strong\u003e Use twice daily, in both your \u003cstrong\u003emorning (AM)\u003c\/strong\u003e and \u003cstrong\u003eevening (PM)\u003c\/strong\u003e routines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLayering:\u003c\/strong\u003e This is a water-based serum and should be applied at the very beginning of your treatment steps, immediately after cleansing and before heavier serums (like Hyaluronic Acid), oils, or creams.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixing:\u003c\/strong\u003e Due to its thin nature, you can also mix a few drops into your daily moisturizer (like Natural Moisturizing Factors + HA) in your palm to boost its hydration properties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTingling Note:\u003c\/strong\u003e You may experience a slight, temporary tingling sensation upon application. This is a normal indicator of the high concentration of active amino acids and typically subsides within seconds.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Patch test before first use. Apply only to unbroken skin as directed.\u003c\/p\u003e\n\n\u003cdiv\u003e\u003cstrong\u003eWho is it for?\u003c\/strong\u003e\u003c\/div\u003e\n\u003cp\u003eThe Ordinary Amino Acids + B5 is designed for anyone needing fundamental, non-greasy hydration:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDehydrated Skin Profiles:\u003c\/strong\u003e Individuals whose skin feels \"tight\" or \"thirsty\" despite regular moisturizing, indicating a lack of NMFs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOily and Combination Skin:\u003c\/strong\u003e Those who need serious clinical hydration but avoid traditional serums because they feel too heavy or sticky.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompromised Barrier Profiles:\u003c\/strong\u003e Anyone whose skin has become sensitized or reactive due to over-exfoliation or harsh US climates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkincare Layering Fans:\u003c\/strong\u003e Users who want a base hydration layer that won't interfere with the texture or absorption of other active treatments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePost-Procedure Recovery:\u003c\/strong\u003e Individuals seeking a gentle, bio-identical way to support skin repair after clinical treatments (consult your physician first).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does The Ordinary Amino Acids + B5 do?\u003c\/summary\u003e\n\u003cp\u003eIt provides weightless, multi-depth hydration and barrier support by delivering a 17% concentration of skin-mimicking amino acids and 5% Pro-Vitamin B5 to improve suppleness and resilience.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow is this different from Hyaluronic Acid 2% + B5?\u003c\/summary\u003e\n\u003cp\u003eWhile both are hydrating, Hyaluronic Acid is a larger molecule that holds water on the surface and has a thicker, slightly \"tacky\" feel. Amino Acids + B5 is \"ultra-thin,\" absorbs faster, and mimics the skin's own natural moisturizing factors for a more \"biological\" hydration feel.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs it normal for the serum to tingle?\u003c\/summary\u003e\n\u003cp\u003eYes. A slight tingling sensation is very common with this product due to the high 17% concentration of amino acids. It is not an indication of irritation but rather the product's high potency as it interacts with the skin surface.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this with Retinol?\u003c\/summary\u003e\n\u003cp\u003eAbsolutely. In fact, it is an excellent companion to Retinol routines. It helps to keep the barrier hydrated and resilient, which can reduce the sensitivity often associated with Vitamin A treatments.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes it have a scent?\u003c\/summary\u003e\n\u003cp\u003eThe product is 100% fragrance-free. Any very faint, earthy aroma you may notice is the natural scent of the concentrated amino acids themselves, which dissipates immediately upon application.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I mix this into my moisturizer?\u003c\/summary\u003e\n\u003cp\u003eYes! Because it is so thin, it acts as a perfect \"booster.\" Many users in the US mix 2-3 drops into their Natural Moisturizing Factors + HA to customize the hydration level of their cream.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill it make my skin look oily?\u003c\/summary\u003e\n\u003cp\u003eNo. It is an aqueous (water-based) serum that contains zero oils or silicones. It sinks in almost instantly, leaving the skin feeling soft and matte rather than shiny or greasy.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs it safe for use during pregnancy?\u003c\/summary\u003e\n\u003cp\u003eYes, the ingredients in Amino Acids + B5 are bio-identical and generally considered safe for use during pregnancy. However, we always recommend consulting your US doctor with the full ingredient list.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use it on my hair or scalp?\u003c\/summary\u003e\n\u003cp\u003eWhile designed for the face, amino acids and B5 are also excellent for hair health. You can apply a few drops to a dry, flaky scalp to provide soothing hydration without clogging follicles.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes it protect against the sun?\u003c\/summary\u003e\n\u003cp\u003eNo. It provides barrier support but contains no SPF. Since maintaining a healthy barrier is key to skin health, always finish your morning routine with a broad-spectrum US sunscreen.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow long will a 30mL bottle last?\u003c\/summary\u003e\n\u003cp\u003eWith twice-daily use (3-4 drops each time), a bottle typically lasts between 2 and 3 months. If mixed into other products, it may last even longer.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use it if I have acne?\u003c\/summary\u003e\n\u003cp\u003eYes. It is non-comedogenic and lightweight, making it ideal for blemish-prone skin that has become dehydrated from acne treatments.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs it suitable for the eye area?\u003c\/summary\u003e\n\u003cp\u003eYou can apply it around the orbital bone, but avoid direct contact with the eyes. For specific eye concerns, we recommend The Ordinary Multi-Peptide Eye Serum.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhere should I store it?\u003c\/summary\u003e\n\u003cp\u003eStore in a cool, dry place away from direct sunlight. It does not need to be refrigerated, but some users find that a cold serum feels extra soothing in the summer heat.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is NMF?\u003c\/summary\u003e\n\u003cp\u003eNMF stands for Natural Moisturizing Factors. These are elements found naturally in our skin (like amino acids, urea, and minerals) that keep the outer layer hydrated and protected. This serum helps to replenish them.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdiv\u003e\u003cstrong\u003eComplete Your Skincare Routine...\u003c\/strong\u003e\u003c\/div\u003e\n\u003cp\u003eBuild a high-performance hydration foundation at theordinaryusa.co with these complementary products:\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e👉 \u003ca href=\"https:\/\/theordinaryusa.co\/products\/glucoside-foaming-cleanser\"\u003eGlucoside Foaming Cleanser\u003c\/a\u003e — The perfect gentle start to your hydration ritual.\u003c\/li\u003e\n    \u003cli\u003e👉 \u003ca href=\"https:\/\/theordinaryusa.co\/products\/natural-moisturizing-factors-ha\"\u003eNatural Moisturizing Factors + HA\u003c\/a\u003e — Seal in your amino acids with this skin-identical moisturizer.\u003c\/li\u003e\n    \u003cli\u003e👉 \u003ca href=\"https:\/\/theordinaryusa.co\/products\/multi-peptide-ha-serum\"\u003eMulti-Peptide + HA Serum\u003c\/a\u003e — Layer with Amino Acids for advanced anti-aging and hydration results.\u003c\/li\u003e\n    \u003cli\u003e👉 \u003ca href=\"https:\/\/theordinaryusa.co\/products\/100-plant-derived-squalane\"\u003e100% Plant-Derived Squalane\u003c\/a\u003e — Add a few drops to your PM routine for extra barrier nourishment.\u003c\/li\u003e\n    \u003cli\u003e👉 \u003ca href=\"https:\/\/theordinaryusa.co\/products\/multi-peptide-lash-brow-serum\"\u003eMulti-Peptide Lash and Brow Serum\u003c\/a\u003e — Complete your clinical beauty regimen.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv\u003e\u003cstrong\u003eWhy Buy From theordinaryusa.co?\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n    \u003cli\u003e🌍 \u003cstrong\u003eOfficial US store\u003c\/strong\u003e — serving all 50 states\u003c\/li\u003e\n    \u003cli\u003e🚚 \u003cstrong\u003eFast, tracked delivery\u003c\/strong\u003e across the United States\u003c\/li\u003e\n    \u003cli\u003e✅ \u003cstrong\u003e100% authentic\u003c\/strong\u003e The Ordinary products\u003c\/li\u003e\n    \u003cli\u003e🔒 \u003cstrong\u003eSecure checkout\u003c\/strong\u003e — SSL encrypted\u003c\/li\u003e\n    \u003cli\u003e💬 \u003cstrong\u003eDedicated customer support\u003c\/strong\u003e for American customers\u003c\/li\u003e\n    \u003cli\u003e🌱 \u003cstrong\u003eVegan \u0026amp; cruelty-free\u003c\/strong\u003e products only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"The Ordinary","offers":[{"title":"30ml","offer_id":45198093221967,"sku":"SKU_1742501143758_690","price":11.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/3355\/2975\/files\/rdn-amino-acids-b5-30ml.png?v=1778411567","url":"https:\/\/theordinaryusa.co\/en-us\/products\/amino-acids-b5-the-ordinary-usa","provider":"The Ordinary","version":"1.0","type":"link"}