Can You Use Glycolic and Lactic Acid Together?

by: Linda Robison / Facial Fitness Specialist @ ABZ

I’ve always loved alpha hydroxy acids (AHAs) for aging skin. Using glycolic and lactic acid together is one of my favorite strategies because they exfoliate, smooth, and brighten the skin.

If you’re after that glass skin look, this is it!

Each acid has its strengths, and when combined in a routine—if done right—they can give you that extra boost for a radiant complexion. Best of all, they’re inexpensive!

Glycolic and lactic acids: How they work together

Both alpha hydroxy acids (AHAs) work wonders for resurfacing the skin, but they each bring something different to the table. And their effectiveness relies on concentration levels. Higher concentrations offer stronger exfoliation but may irritate sensitive skin, if you haven't built a tolerance first.

Glycolic Acid:

• Glycolic acid has the smallest molecules among AHAs, allowing for deep penetration and effective exfoliation. It improves skin tone, texture, and overall appearance by reducing fine lines, wrinkles, hyperpigmentation, and acne scars.

Lactic Acid:

• Lactic acid is a gentler AHA with larger molecules, making it suitable for sensitive or dry skin. It exfoliates and hydrates more gently than glycolic acid, effectively improving skin texture and tone with minimal irritation.

Is it safe to use glycolic and lactic acid together

Yes! Most people can safely use glycolic and lactic acid together when they are already combined in serums, toners, or cleansers.

ABZ Tip: However, do NOT mix them yourself in peels. Only use peels that are specifically formulated to combine both acids safely.

How to choose the right acid for you

Not sure which acid is right for your skin? Here’s a simple guide to help you decide!

• Choose Glycolic Acid if you want deep exfoliation, collagen stimulation, and faster results for fine lines, wrinkles, and pigmentation.
• Choose Lactic Acid if you have dry or sensitive skin and need a gentler exfoliation with added hydration.
• You don’t have to choose just one! Many people alternate between the two to balance exfoliation and hydration.

💡 Note: Most store-bought are synthetically derived, but you can find them in nature too. Some acids naturally occur in fruits, milk, and sugarcane, which means sugar scrubs can be a great way to exfoliate naturally! For a DIY approach, check out my Anti-Aging Sugar Scrub Page.

Choosing Products: Serums, Toners, and Peels

When it comes to using AHA's, the right product choice makes all the difference. Here’s a quick rundown of the types of products available:

1. Cleansers

AHA cleansers, with glycolic or lactic acid, gently exfoliate while washing away dirt and makeup. They're perfect for daily use as they help maintain smoother skin without being too harsh.

2. Toners

Exfoliating toners remove dead skin cells, unclogs pores, and brightens your complexion for a smoother, more radiant look. Use it after cleansing.

3. Serums

Serums are concentrated formulas that deliver potent ingredients directly into your skin. Look for glycolic or lactic acid serums with a balanced pH to maximize benefits. They’re great for targeted treatment. 

4. Peels

Peels deliver the most dramatic results, providing deeper exfoliation. You can find peels in various strengths. Use them as directed, typically once a week or few times a month, for a noticeable glow. Buffered peels are gentler and more recommended for first time users.

My Step-by-Step guide for layering acids

My Products & Sample Routine:

It’s hard to give one-size-fits-all advice because there are so many different types and strengths out there. To help you understand how you might mix and match these acids, I wanted to share my personal routine.

Here’s how I incorporate a cleanser, toner, serum, and peel into my monthly routine:

Daily routine:

1. Cleanser: I start each day with my favorite Garnier Micellar 1% glycolic acid cleanser.

2. Toner: After cleansing, I use The Ordinary Toner with 7% glycolic acid.

Both products are gentle enough for everyday use and work well with my skin.

Weekly routine:

3. Serum: I use Theraderm Fruit Acid Exfoliate a few times a week. And since it's gentle enough for use under the eyes, it helps minimize fine lines and eye wrinkles.

4. Peel: I use SkinBeauty Lactic Acid 35% peel about every 7-10 days. It's strong unbuffered, high concentration. But my skin is used to it from years of use. If you're new to acids, start with a lower concentration or a buffered peel and follow the directions. The company recommends their Buffered Glycolic Acid first time users.

Monthly routine:

5. Peel: I use the iS Clinical Active Peel Treatment System once a month or before a special occasion.

I ADORE this product! The directions recommend using it every other day, but it's too expensive for me. I use it monthly and for special occasions. This peel system really makes your skin look like glass! 

How to get started

Ease Into It

New to AHAs (alpha hydroxy acids)? Start with a gentle cleanser for a few weeks, then try a 10% serum. If your skin handles it well, add a buffered peel monthly, increasing as needed.

Adding AHAs to Your Routine

Skip strong actives (retinol, vitamin C, niacinamide) on peel days to avoid irritation. Everyone’s skin is different, f you see redness or irritation, scale back!

How often can you use them

Lactic and glycolic acid follow similar usage guidelines based on concentration. Here’s how often you can use each, depending on strength.

Lactic Acid

• Low concentrations (5%-10%): Safe for daily or every other day if your skin tolerates it. Common in toners, serums, and mild peels for gentle exfoliation and hydration.
• Moderate concentrations (10%-20%): Best used 2-3 times a week, offering deeper exfoliation without overwhelming the skin.
• High concentrations (20%-30%): Found in more intense at-home peels. Use no more than once a week, depending on your skin's sensitivity.
• Professional-grade (35% and above): Reserved for professional treatments. Strong enough to require application by a trained professional to avoid burns or irritation.

Glycolic Acid

• Low concentrations (up to 10%): Similar to lactic acid, safe for frequent use every other day or even daily, depending on tolerance. Often found in over-the-counter products.
• Moderate concentrations (10%-20%): Recommended for use 2-3 times a week, providing deeper exfoliation to tackle concerns like uneven texture or hyperpigmentation.
• High concentrations (20%-30%): Typically used for stronger at-home peels, with caution. Limit to once a week.
• Professional-grade (35% and above): Applied by professionals only. These peels are stronger, requiring careful monitoring to avoid skin damage.

Don't forget to moisturize!

Importance of Hydration

After using acids, it’s crucial to moisturize. These products can dry out your skin, so keep it hydrated with a moisturizer that has ingredients like hyaluronic acid or ceramides to strengthen the skin barrier.

Sunscreen is a must!

Since acids make your skin more sensitive to the sun, daily sunscreen is essential to protect against sun damage. Choose SPF 30 or higher to keep your skin safe and prevent signs of aging. 

ABZ Tip: I use sunscreens with a PA++ rating. Here is why PA ratings matter for sun protection.

Signs of over-exfoliation and how to fix it

Irritation, redness, or flakiness are signs of over-exfoliation. This indicates inflammation, which can actually age your skin over time. If this happens, stop using acids and focus on calming, hydrating products.

How to Soothe Irritated Skin
Use rich calming creams with ceramides and omega 3 fatty acids. Skip ALL exfoliation until your skin feels balanced again.

---

Takeaway:

Layering these exfoliating acids can brighten and smooth your skin—when used correctly. Pay attention to your skin’s needs: if it looks dull or flaky, go for glycolic acid. If it’s just a little lackluster, a lactic acid refresh might be all you need.

Alternate their use, keep your skin hydrated, and never skip sunscreen. With these simple steps, you can achieve a fresh, youthful glow at any age—without spending a fortune!

Before you go ....

Please tap on the💙in the bottom right corner if you found this page helpful. Also, Let’s CONNECT! Click the buttons below to follow me on social media.

Thanks so much!

---

FREE! Download this Cheek Shaper Video to help lift and firm your cheeks, giving you a more youthful, refreshed look! 💖