Glycolic Acid and Exfoliating Acids: How to Start Safely

Calm glow, comfortable skin.

Imagine buying a popular exfoliating toner and using it every morning and night from day one.

A week later your skin turns red and stings, and you wonder what went wrong.

What's the difference between the acids? Which suits your skin? How often should you use them? And why does sunscreen become non-negotiable?

Let's explore the science behind chemical exfoliation.

1. What is chemical exfoliation?

Skin renews itself constantly, but dead cells can build up on the surface and leave it looking dull and rough.

Chemical exfoliation uses acids to loosen the bonds between these cells so they shed easily, without scrubbing or grains.

The takeaway: The goal is gentle surface renewal, not "peeling" your skin.

2. AHA, BHA and PHA: what's the difference?

Type	Example	Best for
AHA	Glycolic	Dullness and texture
BHA	Salicylic	Pores and breakouts
PHA	Gluconolactone	Sensitive skin

The takeaway: AHA for the surface, BHA for pores, PHA for the gentlest start.

3. Why glycolic acid in particular?

Glycolic acid is the smallest AHA, so it penetrates the surface layers more easily.

That makes it effective for smoothing texture and boosting radiance, but also more likely to sting than lactic or mandelic acid.

The takeaway: Powerful and useful, but it needs a gradual start.

4. Concentration and pH: what do the numbers mean?

The US Food and Drug Administration (FDA) notes that an expert cosmetic safety panel concluded glycolic and lactic acid products are safe for consumers when:

• The concentration is 10% or less.
• The final product's pH is 3.5 or higher.
• The product protects against sun sensitivity or tells users to use daily sun protection.

Higher strengths belong in clinics, under professional supervision.

The takeaway: For home use, less is usually smarter.

5. Acids and the sun: the part many people miss

According to the FDA, after 4 weeks of AHA use, volunteers' sensitivity to UV-induced redness rose by about 18%.

Their sensitivity to UV-induced cell damage roughly doubled, and the difference disappeared a week after stopping.

That's why the FDA advises sunscreen and protective clothing while using AHAs and for a week afterwards.

The takeaway: No exfoliating without sunscreen, especially in our climate.

6. How to start safely

1. Patch-test the product on a small area for two to three days.
2. Start in the evening, just two or three times a week.
3. Apply to dry skin after cleansing, then follow with a gentle moisturiser.
4. Increase frequency only if your skin stays comfortable.
5. Wear sunscreen every morning without exception.

The takeaway: A slow start goes further.

7. What not to combine with acids

The American Academy of Dermatology (AAD) notes that retinoids, retinol and benzoyl peroxide can make skin more sensitive, and combining them with exfoliation may worsen dryness or breakouts.

Never exfoliate broken or sunburned skin.

The takeaway: One active per night is a safe rule to start with.

8. Signs of over-exfoliation

• Redness or stinging that lingers after use.
• A tight, "plastic" shine on the skin.
• Visible flaking or dryness.
• New small breakouts, or sensitivity to products that used to feel fine.

The takeaway: If these appear, pause the acids and focus on moisturising until your skin settles.

9. Common myths

Myth 1: Stinging means it's working.

Not true. Mild, brief tingling can happen, but persistent stinging is a sign of irritation.

Myth 2: Oily skin can handle anything.

Not true. Even oily skin can have its barrier damaged by overuse.

Myth 3: Exfoliating daily gives faster results.

Not true. The stronger the method, the less often it should be used.

10. Exfoliation in Saudi Arabia: why this conversation matters

Strong sun all year round makes increased sun sensitivity a real issue, not a detail.

Olive and brown skin tones can darken after irritation, which is why the AAD advises caution with aggressive exfoliation.

Constant air conditioning dries skin, so moisturising after exfoliation becomes essential.

Make sure the product is registered with the Saudi Food and Drug Authority (SFDA) or comes from a trusted source.

The takeaway: In our climate, exfoliate at night and protect in the morning.

11. How to choose your exfoliant: six questions

1. What's your goal: glow and texture (AHA) or pores and breakouts (BHA)?
2. Is the concentration clearly stated?
3. Is it a leave-on or rinse-off product?
4. Does it combine several acids that may be too strong to start with?
5. Do you use retinoids or prescription acne treatments?
6. Do you have a sunscreen suited to daily use?

One option at Avnzor is The Ordinary Glycolic Acid 7% Exfoliating Toner in a 100ml bottle, swept over skin after cleansing and followed by moisturiser. Best for: dullness and uneven texture.

For combination to oily skin, COSRX AHA BHA Clarifying Treatment Toner comes in 150ml and combines both acid types in a lightweight formula. Best for: visible pores and breakout-prone skin.

12. Frequently asked questions

How often should I use an exfoliating toner?

Start two or three times a week, then adjust to your skin's response and the product directions.

Morning or evening?

Evening is usually better, with sunscreen the next morning.

Can I combine AHA and BHA?

In one balanced product, yes, but don't layer more than one exfoliant on the same night.

Are acids suitable for sensitive skin?

Gentler acids such as PHA or lactic acid may suit it, used less often.

When will I see a difference?

Texture may improve within weeks; evening out tone takes longer.

Is salicylic acid safe in pregnancy?

Ask your doctor before using any chemical exfoliant while pregnant or breastfeeding.

Is tingling normal?

Brief mild tingling can happen; persistent burning means stop.

What if my skin gets irritated?

Stop the acids, use a gentle cleanser and moisturiser, and see a dermatologist if it doesn't settle.

Avnzor's takeaway

Glycolic acid and other acids are effective tools for smoother, brighter skin.

Success depends on three rules: the right strength, a gradual start and daily sunscreen.

At Avnzor, we believe beautiful skin is comfortable skin, and gentle care creates results that last.

Calm glow, comfortable skin.

Discover exfoliation and skincare products from Avnzor, with free delivery and no minimum order.

Disclaimer: This article is for general education only and is not a substitute for advice from a dermatologist or pharmacist. Consult a professional if you have a skin condition, use prescription topical treatments such as retinoids, or are pregnant or breastfeeding. Patch-test any new product first.