The Ordinary lactic acid exfoliating serum 10% + hyaluronic 2% — 1 fl oz, water-based for smoother, hydrated skin

The Ordinary Lactic Acid 10% + Hyaluronic Acid 2% is a water-based exfoliating serum that smooths surface texture and brightens skin while supporting hydration and comfort.

This serum combines a 10% concentration of lactic acid with 2% hyaluronic acid and a Tasmanian pepperberry extract to deliver visible surface exfoliation suitable for dry or dehydrated skin. The formulation is water-based with a pH around 3.8, which aligns with lactic acid’s pKa to balance acidity and active availability. It’s designed for nightly use—apply once daily and follow with sunscreen during daytime to protect newly resurfaced skin.

How will this serum change my skin’s texture?

Regular use helps slough away dead surface cells so pores, fine lines and uneven patches appear smoother. Because it targets the top layer, improvements are often seen in overall tone and radiance without heavy abrasion.

• 10% lactic acid concentration for surface exfoliation
• Water-based formula minimizes greasy feel
• Visible smoothing with continued nightly use

Can I use this if my skin is dry or sensitive?

The formula was developed with dry skin in mind and includes hyaluronic acid to help maintain moisture. Tasmanian pepperberry extract is added as an anti-irritant, but if you have very reactive skin, perform a patch test and introduce the product slowly.

• 2% hyaluronic acid to support hydration
• Tasmanian pepperberry extract to help reduce irritation
• Introduce gradually—start every other night if sensitivity occurs

How should I incorporate it into my routine safely?

Use this serum in the evening only, after cleansing and before heavier treatments. Always apply sunscreen the day after exfoliation to protect newly revealed skin from UV exposure.

• Apply once nightly to dry, cleansed skin
• Layer lighter hydrating products (like a water-based HA) before occlusive moisturizers if needed
• Daily sunscreen is essential following use

What does the pH and formulation mean for effectiveness?

The product’s pH sits near lactic acid’s pKa (~3.8), which helps balance the free acid and its salt form for reliable activity at the skin surface. A water-based vehicle delivers the acid evenly without oils, suitable for those avoiding heavier textures.

• pH approximately 3.8 for optimized lactic acid availability
• Water-based delivery system for non-greasy application
• Free from alcohol, oil, silicone; cruelty-free and vegan

Who is this for: This serum is aimed at people seeking gentle yet effective chemical exfoliation—especially those with dry or dehydrated skin who want improved texture, more even tone, and added hydration. If your skin is highly reactive, pregnant, or using prescription exfoliants, consult a dermatologist and introduce the product gradually. For most users, applying once nightly and protecting the skin with daily SPF will help achieve smoother, more radiant-looking skin over time.

Ingredients

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