Amino Acids + B5
Amino Acids + B5
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The 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.
In 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.
- Bio-Identical Hydration: Utilizes a 17% concentration of amino acids that reflect the natural composition of the skin’s own moisture-retaining system.
- Multi-Depth Moisture Support: 5% Pro-Vitamin B5 provides immediate surface hydration while supporting moisture retention in the deeper outer layers.
- Advanced Barrier Reinforcement: Strengthens the skin’s natural defenses against environmental dehydration, pollutants, and urban irritants.
- Ultra-Lightweight "Thin" Texture: An aqueous formula that absorbs instantly with zero residue, ideal for layering or for those who dislike heavy serums.
- Immediate Skin Softening: Noticeably improves skin suppleness and texture from the very first application for a polished look.
- Non-Comedogenic & Oil-Free: Water-based and free from oils and silicones, making it safe for acne-prone, oily, and combination skin types.
- Calms Visible Irritation: Pro-Vitamin B5 acts as a soothing agent to reduce the appearance of redness and surface sensitivity.
- Optimizes Routine Performance: Preps the skin surface for better absorption of subsequent treatments, acting as a high-performance "primer."
- High-Concentration Efficacy: Delivers professional-grade levels of active ingredients for visible, science-backed results.
- Reduces Transepidermal Water Loss: Helps the skin lock in moisture more effectively by sealing the gaps in the lipid barrier.
- Universal Versatility: A fundamental hydration layer that is effective for all US skin profiles, including the most sensitive.
- Sustainably & Ethically Formulated: A 100% vegan and cruelty-free formula that meets the highest US clinical standards.
The 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.
Pro-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.
| Product Name | Amino Acids + B5 |
| Brand | The Ordinary |
| Format | Ultra-Thin Aqueous Serum |
| Key Actives | 17% Amino Acids (and derivatives), 5% Vitamin B5 |
| pH Level | Approximately 6.75 - 7.25 |
| Targets | Dehydration, Texture, Barrier Support, Softening |
| Suited To | All Skin Types (Ideal for Dehydrated or Oily Skin) |
| Volume | 30mL |
| Vegan / Cruelty-Free | Yes / Yes |
| US Availability | Official US Store — theordinaryusa.co |
Because of its unique "ultra-thin" consistency, proper application and layering are essential to maximize results:
- Cleanse: Start with a clean, dry face. We recommend the Squalane Cleanser for a lipid-preserving start.
- Apply: 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.
- Timing: Use twice daily, in both your morning (AM) and evening (PM) routines.
- Layering: 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.
- Mixing: 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.
- Tingling Note: 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.
Note: Patch test before first use. Apply only to unbroken skin as directed.
The Ordinary Amino Acids + B5 is designed for anyone needing fundamental, non-greasy hydration:
- Dehydrated Skin Profiles: Individuals whose skin feels "tight" or "thirsty" despite regular moisturizing, indicating a lack of NMFs.
- Oily and Combination Skin: Those who need serious clinical hydration but avoid traditional serums because they feel too heavy or sticky.
- Compromised Barrier Profiles: Anyone whose skin has become sensitized or reactive due to over-exfoliation or harsh US climates.
- Skincare Layering Fans: Users who want a base hydration layer that won't interfere with the texture or absorption of other active treatments.
- Post-Procedure Recovery: Individuals seeking a gentle, bio-identical way to support skin repair after clinical treatments (consult your physician first).
What does The Ordinary Amino Acids + B5 do?
It 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.
How is this different from Hyaluronic Acid 2% + B5?
While 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.
Is it normal for the serum to tingle?
Yes. 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.
Can I use this with Retinol?
Absolutely. 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.
Does it have a scent?
The 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.
Can I mix this into my moisturizer?
Yes! 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.
Will it make my skin look oily?
No. 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.
Is it safe for use during pregnancy?
Yes, 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.
Can I use it on my hair or scalp?
While 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.
Does it protect against the sun?
No. 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.
How long will a 30mL bottle last?
With 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.
Can I use it if I have acne?
Yes. It is non-comedogenic and lightweight, making it ideal for blemish-prone skin that has become dehydrated from acne treatments.
Is it suitable for the eye area?
You 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.
Where should I store it?
Store 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.
What is NMF?
NMF 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.
Build a high-performance hydration foundation at theordinaryusa.co with these complementary products:
- 👉 Glucoside Foaming Cleanser — The perfect gentle start to your hydration ritual.
- 👉 Natural Moisturizing Factors + HA — Seal in your amino acids with this skin-identical moisturizer.
- 👉 Multi-Peptide + HA Serum — Layer with Amino Acids for advanced anti-aging and hydration results.
- 👉 100% Plant-Derived Squalane — Add a few drops to your PM routine for extra barrier nourishment.
- 👉 Multi-Peptide Lash and Brow Serum — Complete your clinical beauty regimen.
- 🌍 Official US store — serving all 50 states
- 🚚 Fast, tracked delivery across the United States
- ✅ 100% authentic The Ordinary products
- 🔒 Secure checkout — SSL encrypted
- 💬 Dedicated customer support for American customers
- 🌱 Vegan & cruelty-free products only
