How To Use The Ordinary Glycolic Acid

Understanding The Ordinary Glycolic Acid: What It Is and How It Works

The Ordinary Glycolic Acid is a chemical exfoliant produced by Deciem, a skincare company owned by Estée Lauder. Glycolic acid belongs to a category of ingredients called alpha-hydroxy acids (AHAs). To understand how this product works, it helps to know what glycolic acid actually does on your skin.

Glycolic acid works by breaking down the bonds between dead skin cells on the surface of your skin. Your skin naturally sheds dead cells, but sometimes this process slows down, leading to buildup. This buildup can make your skin look dull, rough, or congested. Glycolic acid accelerates this natural shedding process, revealing fresher skin underneath. The acid dissolves the "glue" holding dead cells together, allowing them to slough away more quickly than they would on their own.

The Ordinary offers glycolic acid in different concentrations. Their most popular option is the Glycolic Acid 7% Toning Solution, which contains 7% glycolic acid. This concentration is considered moderate—strong enough to show results but gentle enough for regular use by many skin types. The product also includes other ingredients like aloe vera, which can soothe skin, and chamomile, which has calming properties.

What makes glycolic acid effective is its molecular size. Glycolic acid is the smallest AHA molecule, meaning it penetrates the skin more effectively than larger exfoliating acids. This smaller size allows it to reach deeper layers and work more efficiently, though it also means it can be more irritating for some people.

Practical Takeaway: Glycolic acid is a chemical exfoliant that removes dead skin cells by dissolving the bonds holding them together. The Ordinary's 7% concentration offers moderate strength, making it suitable for regular use by many people, though individual tolerance varies.

Determining Your Skin Type and Starting Considerations

Before using The Ordinary Glycolic Acid, consider your current skin type and condition. Skin type generally falls into these categories: oily, dry, combination, sensitive, or normal. Your skin type affects how your skin will respond to glycolic acid and how frequently you should use it. Someone with oily skin may tolerate more frequent use than someone with sensitive or dry skin.

If you have oily or combination skin, you may see benefits from glycolic acid more quickly. Oily skin tends to tolerate chemical exfoliants well because excess oil can sometimes buffer the irritation these products cause. However, this doesn't mean dry or sensitive skin can't use glycolic acid—it just means you may need to start with lower frequency and shorter contact times.

Your current skin condition matters significantly. If your skin is already irritated, sunburned, or compromised (such as from a recent procedure), you should delay using glycolic acid. Similarly, if you're using other potentially irritating ingredients like retinoids, vitamin C serums, or other exfoliating products, you may need to space out their use or reduce frequency when adding glycolic acid.

Consider whether you have any known sensitivities to acids. Some people experience reactions to any acid-based product, while others tolerate them well. If you've never used acids before, starting with The Ordinary's 7% concentration and low frequency helps your skin build tolerance gradually. This approach reduces the risk of over-irritation, which can damage your skin barrier and cause redness, peeling, or sensitivity.

The condition of your skin barrier is crucial. Your skin barrier is the outermost layer that protects against water loss and external irritants. If your barrier is compromised (indicated by sensitivity, dryness, or tightness), prioritize repair before adding glycolic acid. Using barrier-supporting products like ceramides, hyaluronic acid, and gentle moisturizers for one to two weeks before starting glycolic acid can prepare your skin.

Practical Takeaway: Assess your skin type, current condition, and existing skincare routine before starting. Avoid using glycolic acid if your skin is already irritated or if you're using multiple other potentially irritating products. Begin with low frequency if you're new to chemical exfoliants.

How to Introduce Glycolic Acid into Your Routine Safely

Introducing glycolic acid gradually is essential for preventing irritation and allowing your skin to adapt. The safest approach for beginners involves starting with the lowest frequency and shortest contact time, then gradually increasing both as your skin builds tolerance.

For the first two weeks, use The Ordinary Glycolic Acid once per week. Apply it to clean, completely dry skin in the evening. Wet skin increases penetration and irritation risk, so allow your face to dry fully after cleansing. Apply the toning solution with a cotton pad, swiping gently across your face, neck, and décolletage if desired. Leave it on for just five to ten minutes the first week, then ten to fifteen minutes in the second week.

After your initial two-week period, you can assess your skin's response. If you experienced no irritation, redness, or sensitivity, you may increase to twice weekly use in week three and four. Still keep contact time at ten to fifteen minutes. Continue this frequency for another two to four weeks before considering increasing further. Some people find that twice weekly is their optimal frequency and never need to use it more often.

Once you've established that your skin tolerates the product well, you can potentially increase to three times weekly, but this should take several weeks to reach. Many dermatologists recommend that most people don't need to use glycolic acid more than three or four times per week. More frequent use doesn't necessarily produce better results and increases irritation risk.

During the introduction phase, monitor your skin carefully. Mild tingling during application is normal, but burning or significant stinging is not. Some mild redness and slight dryness are common, especially initially, but severe peeling or sensitivity warrants reducing frequency. If irritation occurs, return to once-weekly use for another two weeks before attempting to increase again.

Practical Takeaway: Begin with once-weekly, short-duration applications and gradually increase frequency over several weeks. Most people find that two to three times weekly is effective and well-tolerated. Always monitor your skin's response and adjust accordingly.

Proper Application Technique and Product Layering

How you apply The Ordinary Glycolic Acid affects its effectiveness and how your skin responds. Proper application technique ensures the product reaches your skin and works as intended while minimizing irritation risk.

Start with a clean face. Use your regular cleanser to remove makeup, dirt, and oil. Pat your skin completely dry—any remaining moisture dilutes the glycolic acid and reduces its effectiveness. Wait at least five minutes after cleansing to ensure your skin is fully dry. Some people prefer to wait longer, especially if they have reactive skin.

Apply the glycolic acid to your entire face using a cotton pad. Pour a small amount—about a nickel-sized quantity—onto the pad. Swipe the pad across your forehead, cheeks, nose, and chin using gentle, smooth motions. Avoid the eye area, as the skin there is thinner and more sensitive. If using on the neck or décolletage, apply the same way with gentle downward strokes. Use enough product that your face feels slightly wet but not dripping wet.

Let the product sit on your skin for your designated contact time, typically ten to twenty minutes as your tolerance builds. During this time, you may feel mild tingling or see slight redness developing. This is normal. Avoid touching your face or applying other products during this waiting period. If you experience intense burning, you can rinse it off earlier, though this defeats the purpose somewhat.

After the contact time ends, rinse your face thoroughly with lukewarm water. Use your hands or a soft washcloth to gently remove the product. Follow with a hydrating toner, essence, or hydrating serum. This step is crucial because glycolic acid can be drying. Follow with your regular moisturizer and, if applying during the day, a broad-spectrum sunscreen with SPF 30 or higher.

Regarding product layering: apply glycolic acid to completely clean skin before other products. Don't mix it with other actives in the same step. You can use other ingredients like niacinamide or hyaluronic acid in the hydrating steps that follow, but keep the glycolic acid application separate. If you use