Lactic Acid
Lactic Acid for Gentle Surface Exfoliation, Brightening Uneven Tone, and Improving Rough Texture: Complete Ingredient Guide
A gentler AHA than glycolic acid because its molecule is larger. It exfoliates while simultaneously drawing water to the skin. Dr. Sheth’s pairs it with Licorice to combine gentle exfoliation with traditional brightening.
Lactic Acid works through gentle surface exfoliation by loosening bonds between dead skin cells at a slower rate, humectant action that draws moisture to the skin surface, and replenishing the skin's Natural Moisturising Factor.
At a Glance: Lactic Acid
| Attribute | Detail |
|---|---|
| INCI Name | Lactic Acid |
| Alternate Names | AHA, Milk Acid |
| Category | Exfoliant — AHA, Humectant |
| Primary Functions | Gentle surface exfoliation for sensitive and dry skin, brightening uneven skin tone without intense irritation, improving rough skin texture on the body |
| Studied Concentration | 5% to 15% |
| pH Requirement | Low pH for optimal activity |
| Photosensitizing Risk | Mildly photosensitizing |
| Regulatory Status | Non-comedogenic (Rating 0), low sensitivity risk |
What Is Lactic Acid and Why Does It Work?
A gentler AHA than glycolic acid because its molecule is larger. It exfoliates while simultaneously drawing water to the skin. Dr. Sheth’s pairs it with Licorice to combine gentle exfoliation with traditional brightening.
Lactic Acid works through gentle surface exfoliation by loosening bonds between dead skin cells at a slower rate, humectant action that draws moisture to the skin surface during exfoliation, and replenishing the skin's Natural Moisturising Factor.
Functional Role in Skincare
| Functional Role | Category | Sub-role Mechanism |
|---|---|---|
| Primary Active | Gentle Exfoliant | Loosens bonds between dead skin cells at a slower, gentler rate |
| Primary Active | Humectant | Draws moisture to the skin surface during exfoliation |
| Supporting Active | NMF Replenisher | Replenishes the skin's Natural Moisturising Factor |
Skin Concerns Lactic Acid Treats
| Skin Concern | Root Cause Addressed | Mechanism of Action | Studied Concentration | Research Anchor |
|---|---|---|---|---|
| Dry, Rough Skin Texture | Slow cell turnover worsened by hard water in Indian cities and winter dry air | Gentle surface exfoliation + humectant action | 5-15% | J Am Acad Dermatol, 1996 (PMID 8812896) |
| Mild Tan and Surface Pigmentation | UV exposure creating surface-level melanin buildup | Gentle exfoliation of pigmented cells | 5-15% | J Am Acad Dermatol, 1996 (PMID 8812896) |
Why Lactic Acid Is Effective for Indian Skin and Climate
Hard water is widespread in Indian cities — from Delhi to Chennai — and strips the skin's surface lipid layer, contributing to roughness and a dull complexion. Lactic acid addresses this gradually without the irritation risk of stronger exfoliants, making it well-suited to sensitive skin types common in drier regions of northern India. For body care, it effectively targets hyperpigmentation and roughness on knees, elbows, and underarms caused by friction and traditional hair removal methods.
How Lactic Acid Works: Three Mechanisms of Action
1. Gentle Surface Exfoliation
Loosens bonds between dead skin cells at a slower, gentler rate than glycolic acid.
2. Humectant Action
Draws moisture to the skin surface during exfoliation.
3. NMF Replenishment
Replenishes the skin's Natural Moisturising Factor for improved hydration.
Clinical Evidence: Peer-Reviewed Research
| Concentration | Outcome Measured | Study Type | Source & Year | Key Finding |
|---|---|---|---|---|
| 12% | Skin texture and hydration | Clinical Study | J Am Acad Dermatol, 1996 | Significantly improved skin texture and hydration. (PMID 8812896) |
Who Should Use Lactic Acid: Skin Type Guide
| Primary Concern | Skin Type | Severity | Recommended Approach |
|---|---|---|---|
| Dry, rough texture and mild pigmentation | All skin types, especially dry and sensitive | Mild to moderate | Use 5-15% 2-3 times per week in the evening. Preferred AHA for sensitive skin. |
How to Use Lactic Acid: Application Guide
Beginner to Advanced Routine
Beginner
New to AHAs
Intermediate
Established routine
Application Rules
AM/PM Suitability: Evening use preferred.
Sunscreen Requirement: Use SPF30 or higher every morning without exception.
Patch Testing: Apply behind the ear or inner arm. Wait 24 hours.
What Lactic Acid Cannot Do
Does not provide instant dramatic results: Visible improvement in texture takes 4-6 weeks, pigmentation reduction takes 8-12 weeks.
Does not replace stronger exfoliants for deep pigmentation: Best combined with brightening actives for stubborn spots.
Does not replace sunscreen: Mildly photosensitizing — daily SPF is essential.
Lactic Acid Compatibility: Pairing Guide
| Ingredient | Compatibility | Mechanism Relationship | Benefit of Pairing |
|---|---|---|---|
| Licorice Extract | Highly Recommended | Brightening + soothing | Dual brightening and anti-inflammatory support |
| Hyaluronic Acid / Ceramides | Highly Recommended | Hydration lock | Maintains hydration balance during exfoliation |
| Niacinamide | Recommended | Barrier support | Reduces post-exfoliation sensitivity |
How to Find the Right Lactic Acid for You (Dr. Sheth's Range)
Dr. Sheth’s Lactic Acid products are budget-accessible and formulated for sensitive and dry Indian skin.
Cleanse / Treat
For Sensitive Skin Gentle Exfoliation: Liquorice & Lactic Acid Peel - 30g — Buffered with Licorice for gentle daily exfoliation.
For Rough Body Skin + Tan: Licorice & Lactic Acid Body Wash - 250ml — Daily gentle body exfoliation.
Moisturize
For Dry Body Skin & Keratosis Pilaris: Tea Tree & Lactic Acid Body Lotion - 200ml — Hydrating exfoliation for body.
Note: Dr. Sheth's Lactic Acid range is budget-accessible, with products ranging from ₹499 to ₹799.
Frequently Asked Questions About Lactic Acid
Is Lactic Acid better than Glycolic Acid for sensitive skin?
Yes. Lactic acid has a larger molecule size, making it gentler and better tolerated, especially for dry and sensitive skin types.
Can I use Lactic Acid every day?
Yes, at lower concentrations (5%) once your skin builds tolerance. Start with 2-3 times per week.
References
- J Am Acad Dermatol. 1996. 12% lactic acid significantly improved skin texture and hydration. (PMID 8812896)
