The Ordinary Lactic Acid 5% 10% + HA Serum

The Ordinary Lactic Acid 5% 10% + HA Serum is a milder exfoliant that reveals smoother skin.

The Ordinary Lactic Acid 5% 10% + HA Serum is a mild alpha hydroxy acid solution that gently yet effectively exfoliates the skin's surface. It is fortified with a purified Tasmanian pepperberry extract, which has been shown to reduce the irritation and sensitivity often associated with acid use.

This water-based The Ordinary Lactic Acid 5% 10% + HA Serum is ideal for dry and sensitive skin. The pH of this formula is approximately 3.8. Lactic Acid has a pKa of 3.8, and pKa is the most crucial aspect to consider when formulating with acids. pKa implies acid availability. When pKa is close to pH, there is an ideal balance between salt and acid, maximizing the acid's effectiveness and reducing irritation.

Apply The Ordinary Lactic Acid 5% 10% + HA Serum once daily, ideally in the evening. The formula can be diluted with other products to reduce its strength for skin that needs to build tolerance.

Do not use on sensitive, peeling, or damaged skin. Avoid the eye contour and contact with eyes. The product's contact with the skin should be of limited frequency or duration.

If irritation occurs, rinse off, discontinue use, and consult a physician. Use only as directed on unbroken skin. Patch testing prior to use is advised, and keep out of reach of children.

The Ordinary Lactic Acid 5% 10% + HA Serum contains an alpha hydroxy acid (AHA) that may increase your skin's sensitivity to the sun and particularly the possibility of sunburn. Use sunscreen, wear protective clothing, and limit sun exposure while using this product and for a week afterward.

Do not use with "Buffet" + Copper Peptides 1%, EUK 134 0.1%, 100% Niacinamide Powder.

Do not use with direct acids including AHA 30% + BHA 2% Peeling Solution, Azelaic Acid Suspension 10%, Salicylic Acid 2% Masque, Lactic Acid 10% + HA, Salicylic Acid 2% Anhydrous Solution, Lactic Acid 5% + HA, Salicylic Acid 2% Solution, Mandelic Acid 10% + HA, The Bright Set.

Do not use with direct Vitamin C products such as Ascorbic Acid 8% + Alpha Arbutin 2%, Vitamin C Suspension 23% + HA Spheres 2%, Vitamin C Suspension 30% in Silicone, The Bright Set, 100% L-Ascorbic Acid Powder, Ethylated Ascorbic Acid 15%.

Do not use with Peptides: Multi-Peptide Eye Serum, Multi-Peptide + HA Serum, Matrixyl 10% + HA, Multi-Peptide Lash and Brow Serum, Argireline Solution 10%, Multi-Peptide Serum for Hair Density, The Future Set, "Buffet" + Copper Peptides 1%

Do not use with Retinoids: Granactive Retinoid 2% Emulsion, Granactive Retinoid 5% | 2% in Squalane, Retinol 1% | 0.5% | 0.2% in Squalane.

The Ordinary formulations are updated over time as part of Deciem's commitment to innovation. As such, the ingredient list shown here may differ from the product box depending on time and region of purchase. Best used within 12 months after opening.

Aqua (Water), Lactic Acid, Glycerin, Pentylene Glycol, Propanediol, Sodium Hyaluronate Crosspolymer, Tasmannia Lanceolata Fruit/Leaf Extract, Acacia Senegal Gum, Xanthan Gum, Isoceteth-20, Trisodium Ethylenediamine Disuccinate, Sodium Hydroxide, Ethylhexylglycerin, 1,2-Hexanediol, Caprylyl Glycol.

Our formulations are updated from time to time as part of our commitment to innovation. As such, the ingredient list shown here may vary from the box of the product depending on time and region of purchase.

Scientific Storage Guide for The Ordinary Cosmetics According to Brand Standards

Using high-concentration active products requires users to have solid knowledge of storage methods to maintain ingredient activity. This article provides a detailed storage guide for The Ordinary, helping to optimize skincare effectiveness and prevent active ingredient oxidation.

Core Storage Principles for The Ordinary

Most of The Ordinary's serums are designed in dark glass bottles to limit light exposure; however, users still need to adhere to the following fundamental rules:

1. Avoid direct sunlight: UV rays can break down the chemical structure of less stable molecules, reducing the therapeutic effectiveness of The Ordinary cosmetics.
2. Control temperature: The ideal temperature is below 25 degrees Celsius. Avoid storing products in the bathroom, as high humidity and sudden temperature changes from hot water can damage the preservation system.
3. Clean the bottle cap: After each use, wipe off any excess serum from the bottle neck to prevent residue buildup, ensuring the cap is tightly sealed and completely isolated from the air.

How to Store Specific The Ordinary Serum Lines

Each group of active ingredients in The Ordinary serum system has different stability, thus requiring specific environmental conditions to prevent degradation.

Vitamin C Derivatives and Retinoids Group

These are the most sensitive ingredients to temperature and oxygen. Improper storage will cause the product to change color and lose its biological activity.

• Retinoids (Retinol and Granactive Retinoid): The brand strongly recommends storing these in the refrigerator immediately after opening. Low temperatures help slow down the degradation of Vitamin A derivatives.
• Pure Vitamin C (L-Ascorbic Acid): For powder or suspension forms, keep the product in an absolutely dry place. If the serum turns dark orange or brown, it means the product has oxidized and should no longer be used on the skin.

Direct Acids and Hydrating Molecules Group

Products like AHA, BHA, or Hyaluronic Acid are generally more stable but still require attention to the following technical details:

• Avoid humid environments: If airborne moisture penetrates the bottle, it will alter the pH concentration of The Ordinary acids, potentially causing unwanted irritation.
• Close the lid immediately: Active ingredients such as Niacinamide 10% + Zinc 1% tend to crystallize easily at the bottle's mouth if exposed to air for too long, hindering tight cap closure in subsequent uses.

Optimal Solutions for Using The Ordinary Products in Vietnam

Given the hot and humid tropical climate, storing The Ordinary requires stricter measures to extend product shelf life.

1. Use a dedicated cosmetic refrigerator: If possible, invest in a cosmetic refrigerator to maintain a stable temperature of 10-15 degrees Celsius for specialized serums.
2. Do not decant products: Decanting serum into smaller bottles increases the surface area exposed to oxygen, causing active ingredients to degrade many times faster.
3. Check Period After Opening (PAO): Always remember the open jar symbol on the bottle (usually 6M or 12M) to discard the product at the correct time, ensuring safety for the skin's barrier.

To optimize your daily skincare routine, readers should explore more articles on combining active ingredients, lifestyle tips for arranging a scientific vanity, and detailed steps for advanced skincare regimens. This additional information will help you better understand the mechanism of action of each ingredient, thereby achieving the best cosmetic results.

All products provided by Kallos ensure genuine standards and transparency through a strict system of documentation and control:

• Purchase invoice: Proves clear origin.
• Genuine product label: Guarantees quality directly from the manufacturer.
• Complete secondary labels: Complies with legal regulations for imported goods.
• Tracking code: All orders have route verification information directly from the brand, helping customers easily track and verify the shipping process.

To better understand how to identify genuine products, you can refer to the comprehensive article on how to distinguish real and fake The Ordinary cosmetics here.

The Ordinary: Scientific Skincare Solution with Optimal Cost

The Ordinary has revolutionized the global beauty industry by simplifying ingredient lists and transparently stating active ingredient concentrations. The brand focuses on targeted solutions that deliver real results rather than flowery advertising claims.

Outstanding advantages of The Ordinary cosmetics

Products from The Ordinary are favored by Vietnamese consumers due to the following technical characteristics:

1. Pure formulas: Focus on key ingredients such as Retinoids, Vitamin C, and Hyaluronic Acid, allowing users to easily customize their skincare routine.
2. Accessible pricing: Eliminates expensive marketing costs and elaborate packaging to focus resources on the quality of the essence inside.
3. Transparent ingredient list: All information regarding concentration and pH is clearly listed on the packaging.

Popular The Ordinary product lines today

Choosing the right The Ordinary serum helps quickly improve pigmentation issues and skin texture:

• Acne treatment and oil control: The Niacinamide 10% + Zinc 1% line effectively minimizes pores.
• Deep hydration: Products containing multi-molecular weight Hyaluronic Acid help skin stay hydrated for a long time.
• Surface renewal: AHA 30% + BHA 2% chemical exfoliant helps visibly brighten and smooth skin.

To ensure you receive genuine products with expert consultation services, you can browse and purchase The Ordinary product lines directly at Kallos. We are committed to providing quality products and supporting customers in building a scientific and safe skincare routine.