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by: Linda Robison
I’ve always been a fan of acids, especially for aging skin. Using glycolic and lactic acid together is one of my favorite strategies because they help exfoliate, smooth, and brighten the skin.
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!
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:
Lactic Acid:
Is it safe to use glycolic and lactic acids together?
Yes, most people can safely use glycolic and lactic acid serums, toners, and cleansers together. However, when it comes to peels, never mix them unless they are already combined in a special formula.
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 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:
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.
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 wrinkles.
Note: Theraderm Fruit Acid has significantly increased in price! It's a fantastic product that can be used under the eyes, which is why I still buy it. However, if you're looking for a more affordable option, check out this serum from The Ordinary. It has great reviews and a good price, but keep in mind that it shouldn't be used around the eyes.
4. Peel: I use SkinBeauty Lactic Acid 35% peel about every 7-10 days. This is strong because of its 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.
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 makes my skin too dry at that frequency. Plus, it’s expensive!
This peel system really makes your skin look like glass! It contains AHAs and a small amount of beta hydroxy acid (BHA) in the form of salicylic acid. Most people associate BHA's with oily skin or acne.
Salicylic acid is found in products like iS Clinical Active Peel because it soothes the skin and boosts the effectiveness of glycolic and lactic acids. This makes it beneficial for aging or non-oily skin by improving texture and reducing irritation.
Ease Into It
For those new to AHAs, start with a gentle cleanser for a few weeks. Then, introduce a low concentration (like 10%) serum. If your skin tolerates that well, maybe add a buffered peel once a month, gradually increasing frequency as your skin adjusts.
Introducing AHAs to Your Routine
If active ingredients (like retinols, vitamin C, or niacinamide) are part of your skincare routine, it's best to skip them on the days you use a strong peel to prevent irritation.
Note: These are general suggestions, but everyone’s skin is unique. Always listen to your complexion—redness or irritation means you're overdoing it for your skin type!
Just a quick FYI: lactic acid and glycolic acid have similar usage guidelines based on their concentrations. Here’s a quick breakdown for both.
Lactic Acid
Glycolic Acid
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.
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.
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.
Question: Can I use glycolic acid and retinol together?
Answer: While glycolic acid helps remove dead skin cells, and retinol boosts skin cell turnover, dermatologists recommend alternating their use due to the potential for irritation when used simultaneously. If you have sensitive skin, it's best to consult your dermatologist before combining these ingredients.
Question: Can I use both in one routine?
Answer: Only in specially formulated products; otherwise, alternate.
Question: What if I use retinol?
Answer: Avoid using retinol and glycolic acid on the same night. Alternate them.
Question: Can I use them with vitamin C?
Answer: Yes but use vitamin C at different times. This shouldn't be a problem since you would use vitamin C everyday and the acids only on certain days of the week/month. On the days you use the acids, skip the vitamin C.
Layering these exfoliating acids can help brighten and smooth your skin when used correctly. Analyze your skin to determine if you need a deeper exfoliation treatment; if it looks really dull or flaky, reach for glycolic acid. If it’s just a little dull, a lactic acid refresh might be all it needs.
Just remember to alternate their use, keep your skin moisturized, and wear sunscreen every day. With these simple steps, you can enjoy a fresh, youthful look at any age without breaking the bank. It’s an easy and affordable way to enhance your skincare routine!
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