Lactic Acid 5% + HA
Lactic Acid 5% + HA
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The Ordinary Lactic Acid 5% + HA is a professional-grade, entry-level chemical exfoliator designed to significantly improve skin radiance and surface texture while maintaining the highest level of skin comfort. In the family of Alpha Hydroxy Acids (AHAs), Lactic Acid is celebrated for its unique dual-action profile: it simultaneously provides effective resurfacing and intensive hydration. This mild 5% concentration is specifically engineered for those with sensitive skin or those who are entirely new to chemical exfoliation. It works by weakening the biological "glue" that binds dead skin cells to the stratum corneum, facilitating a more efficient and controlled desquamation process. By clearing away this surface debris, the serum reveals a measurably smoother, more luminous, and even-toned complexion underneath. To further support the skin barrier, the formula is fortified with a purified Tasmanian Pepperberry derivative, known for its rapid ability to soothe the inflammation and redness often associated with acid use. Additionally, the inclusion of a specialized Hyaluronic Acid complex ensures that the skin remains plump and hydrated throughout the treatment. This solution provides a gentle, science-backed route to revitalized skin, making it a fundamental clinical tool for maintaining a healthy US glow without the downtime of stronger peels. Available for fast US delivery at theordinaryusa.co.
In the United States, consumers face a staggering diversity of regional environmental pressures that can lead to skin sensitivity and dehydration. For those living in the arid desert climates of the Southwest (Arizona, Nevada) or the freezing, low-humidity winters of the Northeast and Midwest, the skin's barrier is often under constant stress, making traditional high-strength acids feel too aggressive. Conversely, in major US metropolitan hubs like New York City, Chicago, and Philadelphia, the daily accumulation of urban particulate matter can cause the skin to look sallow, "gray," and congested. The Ordinary Lactic Acid 5% + HA is a US essential because it provides a "smart" and cautious approach to resurfacing. As a larger molecular weight AHA, Lactic Acid penetrates the skin more slowly than Glycolic Acid, providing a buffered and controlled exfoliation that is ideal for the diverse and often reactive American complexion. Its inherent humectant properties are perfectly suited for the fast-paced American lifestyle, offering a clinical-grade "glow-up" that actively repairs the moisture barrier while refining the grain. Whether you are navigating a smog-heavy commute or the dry air of a transcontinental flight, this serum provides the resilient hydration and resurfacing infrastructure needed to keep your skin looking polished and protected in any regional environment.
- Gentle Surface Resurfacing: Effectively dissolves dead skin cell buildup to reveal a measurably smoother and brighter skin surface with minimal irritation.
- Immediate Radiance Boost: Works to eliminate sallow dullness and lackluster skin tone for a vibrant, healthy-looking US glow.
- Refines Skin Texture: Visibly smooths out minor "bumpy" texture and rough patches, promoting a more uniform and polished skin grain.
- Dual-Action Hydration: Lactic acid acts as a natural humectant, drawing moisture into the skin while it exfoliates.
- Soothing Tasmanian Pepperberry: Infused with a botanical derivative clinically shown to reduce the neural signals of burning and irritation.
- Barrier Support with HA: Formulated with Hyaluronic Acid to ensure the skin remains comfortable and plumped during the resurfacing cycle.
- Perfect Entry-Level AHA: An ideal 5% concentration for beginners or those with reactive skin who cannot tolerate stronger Glycolic acids.
- Unifies Uneven Tone: Helps to balance the appearance of localized discoloration and minor post-inflammatory marks.
- Non-Comedogenic & Oil-Free: A lightweight, aqueous formula that provides intensive results without clogging pores.
- Optimizes Routine Absorption: By clearing the path of dead skin cells, it allows subsequent serums and oils to penetrate more effectively.
- Universal Versatility: A fundamental exfoliation layer that is safe for almost all US skin profiles, including the most delicate.
- Sustainably & Ethically Produced: A 100% vegan and cruelty-free formula that meets the highest US clinical standards.
The core science of this treatment is centered on Lactic Acid, an Alpha Hydroxy Acid (AHA) that is naturally found in the skin's own Natural Moisturizing Factors (NMF). In clinical dermatology, Lactic Acid is distinguished by its larger molecular weight compared to Glycolic Acid. This physical property ensures a more gradual penetration through the lipid bilayer of the stratum corneum, which significantly reduces the risk of acute inflammatory response. At a 5% concentration, it works through desquamation, weakening the ionic bonds between skin cells to encourage turnover. Because Lactic Acid is chiral and contains a hydroxyl group, it has a high affinity for water molecules, making it one of the few exfoliating agents that actually increases skin hydration levels. Our formula is held at a pH of approximately 3.8, which is the pKa of Lactic Acid—the precise point of chemical equilibrium that ensures peak bio-availability and molecular stability.
To mitigate the stinging sensation that can occur even with mild acids, we have included Tasmanian Pepperberry. The science of this extract involves a unique molecule called polygodial, which has been clinically demonstrated to rapidly inhibit the TRPV1 receptors in the skin. These receptors are responsible for sensing the burning and itching signals triggered by pH shifts. By calming these neural pathways, the Pepperberry derivative ensures that the 5% concentration remains exceptionally comfortable for regular clinical use on the US complexion.
The formula is further enhanced with Sodium Hyaluronate, a salt form of Hyaluronic Acid that possesses a lower molecular weight for deeper penetration. The science of HA involves its incredible ability to bind up to 1,000 times its weight in water. By creating a moisture reservoir within the surface layers, it buffers the skin against the potentially drying effects of the acid, leaving the face feeling hydrated and supple rather than stripped.
| Product Name | Lactic Acid 5% + HA |
| Brand | The Ordinary |
| Format | Water-Based Aqueous Serum |
| Key Active | 5% Lactic Acid (AHA) |
| pH Level | Approximately 3.6 – 3.8 |
| Targets | Dullness, Fine Lines, Texture, Hydration |
| Suited To | All Skin Types (Ideal for Sensitive and Beginners) |
| Volume | 30mL |
| Vegan / Cruelty-Free | Yes / Yes |
| US Availability | Official US Store — theordinaryusa.co |
To achieve the best clinical results while maintaining skin comfort, follow these professional application protocols:
- Preparation: Start with a clean, dry face. We recommend a gentle cleanser like the Glucoside Foaming Cleanser.
- The Dry Skin Rule: Do not apply to wet or damp skin. Water can increase the penetration speed of acids, which may lead to unnecessary irritation.
- Timing: Use ideally in the evening (PM) routine. We recommend starting with 2-3 times per week and gradually increasing to daily use as your skin builds tolerance.
- Application: Dispense 2-3 drops into the palms of your hands and press gently onto the entire face and neck. Avoid the immediate eye area and eyelids.
- Sequence: Being a water-based serum, it should be applied after cleansing and before heavier serums, oils, or moisturizers.
- Sun Alert: This product contains an AHA that may increase your skin's sensitivity to the sun. Always finish your morning routine with a broad-spectrum high-SPF US sunscreen and limit sun exposure for one week after use.
- Rinse: This is a leave-on treatment. Do not rinse off after application.
Note: Patch test before first use. Apply only to unbroken skin as directed.
The Ordinary Lactic Acid 5% + HA is designed for anyone seeking a more polished and hydrated complexion:
- AHA Beginners: Individuals who have never used chemical exfoliants before and want a gentle, "safe" entry point.
- Sensitive Skin Profiles: Those who find Glycolic Acid or Salicylic Acid too irritating for their barrier.
- Dry and Dehydrated Skin: US consumers who need resurfacing but struggle with moisture loss—this formula hydrates while it works.
- Lackluster Complexions: Anyone seeking to eliminate sallow undertones and restore a visible, healthy US glow.
- Textural Concern Profiles: Individuals struggling with minor "bumpy" texture or rough skin grain.
- All US Skin Profiles: A non-comedogenic, pH-balanced formula that is safe and effective for everything from oily to very dry skin.
What does The Ordinary Lactic Acid 5% + HA do?
It provides a gentle, multi-depth resurfacing and hydration treatment by utilizing a 5% concentration of Lactic Acid to dissolve dead skin cells, targeting dullness and texture for a brighter, smoother complexion.
Is 5% Lactic Acid enough to see results?
Yes. While it is a "gentle" concentration, consistent daily use at 5% is highly effective at maintaining skin radiance and refining the grain without the barrier stress of higher concentrations.
How is Lactic Acid different from Glycolic Acid?
Lactic Acid has a larger molecular size, meaning it penetrates the skin more slowly and gently. It also has natural humectant properties, making it much better suited for sensitive or dry US skin than Glycolic Acid.
Can I use this with Retinol or Vitamin C?
We recommend separating these treatments. Use Lactic Acid in the evening and Vitamin C in the morning. Avoid using Lactic Acid and Retinol on the same night to prevent over-exfoliation and irritation.
Will it make my skin purge?
As with any active that increases cellular turnover, a minor "purging" period is possible but less likely with this gentle 5% concentration. If it occurs, it typically resolves within 2 weeks.
Do I need to wash it off?
No. It is a leave-on serum designed to work overnight. You should follow it with your regular moisturizer to lock in the actives.
Can I use it if I have sensitive skin?
Yes, this is specifically formulated for sensitive profiles and includes Tasmanian Pepperberry to reduce the irritation associated with acid use.
Is it safe for use during pregnancy?
Lactic Acid at 5% is generally considered safe during pregnancy. However, because skin sensitivity can change, we always suggest consulting your US physician before starting a new treatment.
How long will a 30mL bottle typically last?
With daily use (2-3 drops), a bottle typically lasts between 2 and 3 months, providing exceptional clinical value.
Does it have a scent?
It is 100% fragrance-free. Any clean clinical aroma is the natural result of the Lactic Acid and the botanical extracts within the formula.
Will it help with my large pores?
By clearing surface buildup that can stretch the pore openings, it helps the skin grain look more refined and the pores appear less prominent.
Why is it a water-based serum?
The aqueous format ensures that the Lactic Acid can interact effectively with the skin surface without being blocked by oils or heavy silicones.
Can I use it on my body?
Yes! It is excellent for smoothing rough skin on the elbows, knees, or the back of the arms (KP).
Where should I store the bottle?
Store in a cool, dry place away from direct sunlight. It does not require refrigeration to remain potent and stable.
What should I do if I get a tingling sensation?
A mild tingling is normal as the acid works. If you experience intense burning or see persistent redness, rinse off immediately and focus on barrier repair.
Build a high-performance ritual for radiance and smoothness at theordinaryusa.co with these complementary products:
- 👉 Glucoside Foaming Cleanser — The perfect gentle start to your exfoliating routine.
- 👉 Hyaluronic Acid 2% + B5 — Layer after the acid to deeply rehydrate the newly resurfaced skin.
- 👉 Soothing & Barrier Support Serum — The "Pink Serum" for the ultimate post-exfoliation recovery.
- 👉 Natural Moisturizing Factors + HA — Finish your routine with this skin-identical moisturizer seal.
- 👉 Multi-Peptide Lash and Brow Serum — Complete your high-performance clinical beauty regimen.
- 🌍 Official US store — serving all 50 states
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