Tax included and shipping calculated at checkout
Table of Contents
- Glycolic Acid vs Lactic Acid: Key Differences for Pregnancy
- Glycolic Acid Pregnancy Safety: What the Evidence Shows
- Lactic Acid Pregnancy Safety: A Gentler Alternative
- Using The Ordinary Glycolic Acid 7% During Pregnancy
- Pregnancy Acne Treatment: Choosing Between Acids
- Practical Guidance: Which Acid and How to Use It Safely
- Frequently Asked Questions
Last Updated: October 11, 2026
Glycolic Acid vs Lactic Acid: Key Differences for Pregnancy
When you're pregnant, your skin changes. Hormones shift. Breakouts appear. You want solutions that work, but safety matters more than results.
Glycolic acid and lactic acid are both alpha hydroxy acids (AHAs) that exfoliate skin. They sound similar. They work differently. One is stronger. One is gentler. For pregnant skin, the difference matters.
This guide from MProve Body breaks down what you need to know about glycolic acid vs lactic acid during pregnancy and how to use these acids safely. We'll explain how they work, what the evidence actually shows, and which one makes sense for your situation.
How Alpha Hydroxy Acids Work on Skin
Alpha hydroxy acids dissolve the bonds between dead skin cells on the surface. This process is called chemical exfoliation. It removes buildup that makes skin look dull, textured, or rough.
When AHAs work on your skin:
- They break down connections between dead cells
- New skin cells rise to the surface
- Skin texture improves and looks brighter
- Acne and breakouts may clear faster
The strength of an AHA depends on its molecular size and how much is in the product. Smaller molecules penetrate deeper. Higher concentrations work stronger. Both factors matter for safety during pregnancy.
Glycolic Acid and Lactic Acid: Molecular Differences
Glycolic acid has the smallest molecular size of all AHAs. This means it penetrates skin fastest and deepest. It's potent.
Lactic acid has a larger molecular structure. It works more slowly and stays closer to the skin surface. It's gentler.
This single difference changes everything:
- Glycolic acid = faster results, stronger irritation risk
- Lactic acid = slower results, less irritation risk
For pregnancy skin, size matters because your skin is already more sensitive due to hormonal changes.
Glycolic Acid Pregnancy Safety: What the Evidence Shows
Is glycolic acid safe during pregnancy? The honest answer: we don't have large clinical studies testing it in pregnant women.
What we do know:
- Topical glycolic acid absorbs minimally through intact skin
- The amount that enters the bloodstream is very small
- No major health organizations have banned it outright during pregnancy
But "probably safe" is not the same as "proven safe." The evidence has limits.
Topical Application and Systemic Absorption
When you apply glycolic acid to skin, most of it stays on the surface. Your skin barrier blocks most molecules from entering your body.
Studies on topical AHAs show:
- Less than 5% penetrates into deeper layers
- Even less reaches the bloodstream
- Concentration and frequency affect how much absorbs
But pregnancy changes your skin. It becomes more permeable. Hormones increase blood flow. These changes may increase absorption slightly, though no studies measure this specifically during pregnancy.
The safest approach: use lower concentrations and less often. If you're using a 7% glycolic acid product, consider using it only once or twice weekly instead of daily.
Strength, Concentration, and Risk
Glycolic acid products range from weak to very strong:
| Strength Level | Concentration | Use Case | Pregnancy Consideration |
|---|---|---|---|
| Very Low | 1-3% | Daily cleansers | Generally considered safe |
| Low | 4-7% | Regular serums | Use cautiously, less frequent |
| Medium | 8-15% | Weekly treatments | Avoid or consult OB/GYN |
| High | 15%+ | Professional peels | Not recommended |
The Ordinary Glycolic Acid 7% is in the low-to-medium range. At this strength, it can cause irritation in non-pregnant skin. During pregnancy, when sensitivity is already elevated, the risk increases.
Professional peels (15% and above) are stronger. These should be avoided during pregnancy unless your OB/GYN approves them specifically.
Lactic Acid Pregnancy Safety: A Gentler Alternative
Lactic acid is derived from milk. It's naturally present in skin. Because of its larger molecular size, it works more gently than glycolic acid.
For pregnant skin, lactic acid offers a real advantage: you get exfoliation with less irritation risk.
Why Lactic Acid May Be Preferred During Pregnancy
Lactic acid causes fewer problems during pregnancy for clear reasons:
- Slower penetration means less absorption
- Gentler action means less irritation and sensitivity
- Still effective for texture, dullness, and mild acne
- Works well at higher concentrations without harsh effects
If you're dealing with pregnancy acne or dull skin, lactic acid often delivers results without the irritation that glycolic acid might trigger.
Lactic acid products range from 5% to 12% in over-the-counter formulas. Even the stronger versions tend to feel gentler than comparable glycolic acid products.
Using The Ordinary Glycolic Acid 7% During Pregnancy
The Ordinary Glycolic Acid 7% is popular, affordable, and widely available. But is it safe during pregnancy?
At 7%, it sits in a gray zone. It's not so strong that most OB/GYNs will say "absolutely no." It's not so weak that you can use it daily without thought.
If you're already using it and want to continue:
- Reduce frequency from daily to 2-3 times weekly
- Start with shorter contact time (leave it on for 5-10 minutes, not 20)
- Watch for irritation, redness, or sensitivity
- Stop immediately if you experience burning or excessive dryness
- Talk to your OB/GYN before continuing
Many women find that pregnancy sensitivity makes even 7% glycolic acid feel too strong. If you notice increased irritation, switching to lactic acid is a smarter move than pushing through.
Pregnancy Acne Treatment: Choosing Between Acids
Pregnancy acne is real. Hormones trigger oil production. Bacteria multiply. Breakouts happen.

Both glycolic acid and lactic acid can help. But they work differently, and pregnancy changes which one makes sense.
When Exfoliation Helps Pregnancy Breakouts
Exfoliation helps acne by:
- Removing dead skin that clogs pores
- Reducing buildup where bacteria grow
- Improving absorption of other acne treatments
- Making skin texture smoother
But exfoliation also irritates. During pregnancy, your skin is already inflamed from hormonal shifts. Adding chemical exfoliation can push irritation over the edge.
This is where acid choice matters. Lactic acid exfoliates without the irritation risk that glycolic acid carries.
Irritation, Sensitivity, and Safe Use During Pregnancy
Pregnancy skin is more sensitive. This isn't just perception, hormones genuinely change how your skin reacts to products.
Signs your acid is too strong for pregnancy:
- Redness that lasts more than an hour after use
- Burning or stinging that doesn't fade quickly
- Dryness or flaking that won't improve
- Increased breakouts instead of improvement
- Itching or swelling
If you notice these, stop using the product and switch to something gentler. Lactic acid, or even just a gentle cleanser and moisturizer, often works better during pregnancy than pushing a strong exfoliant.
Practical Guidance: Which Acid and How to Use It Safely
So which acid should you choose when comparing glycolic acid vs lactic acid during pregnancy? Here's the practical breakdown.
Choose glycolic acid if:
- You were using it before pregnancy and your skin tolerates it well
- You reduce frequency to 2-3 times weekly
- You're willing to monitor closely for irritation
- Your OB/GYN has approved continued use
Choose lactic acid if:
- You're pregnant and looking for a new exfoliant
- You have sensitive or reactive skin
- You want results with minimal irritation risk
- You're dealing with acne or dullness but want a gentler approach
Skip both acids if:
- You're in your first trimester and prefer to minimize any topical exposure
- Your skin is already inflamed, irritated, or reactive
- You have a history of sensitivity to chemical exfoliants
Concentration, Frequency, and Application Tips
If you use an acid during pregnancy, follow these rules:
For glycolic acid:
- Use 7% or lower only
- Apply 2-3 times per week maximum
- Leave on skin for 5-10 minutes, not longer
- Always follow with moisturizer and sunscreen
- Stop if irritation develops
For lactic acid:
- 5-10% is safe for more frequent use
- Can use 3-4 times weekly if well tolerated
- Leave on for 10-15 minutes
- Follow with moisturizer and sunscreen
- Generally causes less irritation than glycolic acid
General rules for both:
- Never use both acids in the same routine
- Avoid other potentially irritating ingredients (retinol, vitamin C, benzoyl peroxide) on the same days
- Use broad-spectrum sunscreen every day (pregnancy hormones increase pigmentation risk)
- If you're unsure, ask your OB/GYN before starting
When to Avoid Acids and Seek Medical Advice
Stop using any acid and contact your OB/GYN if:
- You develop a rash, hives, or swelling
- Irritation doesn't improve after stopping the product
- You're in your first trimester and prefer to minimize exposure
- You have a history of skin conditions like eczema or rosacea that flare easily
- You're unsure whether a specific product is safe
Your OB/GYN knows your health history and pregnancy specifics. They can give personalized advice that a general guide cannot.
Pregnancy skin needs care, not harsh treatment. Both glycolic acid and lactic acid can fit into a pregnancy skincare routine, but lactic acid is the gentler, safer choice for most women. If you're dealing with acne or texture changes, MProve Body's pregnancy-formulated skincare is designed by a board-certified OB/GYN to address these concerns safely. Our products combine clinical expertise with ingredients chosen specifically for pregnant and postpartum skin, so you can treat breakouts and dullness without worry.
Frequently Asked Questions
Is glycolic acid safe during pregnancy?
Glycolic acid is a topical product with minimal systemic absorption when applied to the skin. Low-strength formulations (under 10% concentration) are generally considered safe for use during pregnancy by many dermatologists and OB/GYNs. However, safety depends on concentration, frequency of use, and individual skin sensitivity. Professional-strength peels and high-concentration products should be avoided or discussed with your healthcare provider first. Always perform a patch test and discontinue use if you experience significant irritation or redness.
What's the difference between glycolic acid and lactic acid for pregnancy acne?
Glycolic acid is a smaller molecule that penetrates deeper and exfoliates more aggressively, making it effective for acne but potentially more irritating during pregnancy when skin sensitivity increases. Lactic acid is larger, gentler, and hydrating, making it often the preferred choice for pregnancy acne treatment. Both are alpha hydroxy acids (AHAs), but lactic acid's milder action and skin-barrier support make it safer for expectant mothers with hormonal breakouts.
Can I use The Ordinary Glycolic Acid 7% while pregnant?
The Ordinary Glycolic Acid 7% is a low-strength formulation that many healthcare providers consider acceptable during pregnancy for topical use. However, individual tolerance varies. Start with once or twice weekly application, use only on affected areas, and avoid the eye and lip regions. If you experience persistent redness, dryness, or sensitivity, stop use and consult your OB/GYN. Pregnant women with sensitive skin or a history of reactions to acids should consider lactic acid as a gentler alternative.
Should I avoid all skincare acids during pregnancy?
You don't need to avoid all acids during pregnancy. Low-strength topical AHAs like glycolic and lactic acid are widely considered safe when used appropriately. However, avoid high-concentration professional peels, salicylic acid (a BHA), and retinol-based products. Focus on low-strength, gentle formulations applied infrequently. If you're uncertain about any product, ask your OB/GYN or dermatologist before use, especially if you have sensitive skin or a history of adverse reactions.