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9 Best Glycolic Acid Serums for 2026 That Transform Your Skin
Choose from nine top glycolic acid serums for 2026, featuring concentrations from 10% to 30%. Medix 5.5 offers deep overnight exfoliation with 10% glycolic acid, while YEOUTH’s 30% peel suits experienced users seeking potent renewal. Naturium and Natural Outcome provide gentle daily exfoliation safe for sensitive skin. Alpha Skin Care’s 14% formula targets anti-aging with moisturizing benefits. Always patch test, apply as directed, and avoid sun exposure. Discover how each product suits your skin type and goals.
Key Takeaways
- Medix 5.5 offers a clinically tested 10% glycolic acid serum for deep overnight exfoliation and fine line reduction.
- Naturium Glycolic Acid Resurfacing Gel 10 suits dry, acne-prone, and aging skin with gentle daily exfoliation and collagen boosting.
- Alpha Skin Care Renewal Serum with 14% glycolic acid targets anti-aging by reducing wrinkles and evening skin tone.
- YEOUTH 30% Glycolic Acid Face Peel is ideal for experienced users seeking potent exfoliation combined with retinol benefits.
- Natural Outcome’s 12% glycolic serum provides gentle exfoliation safe for sensitive skin while improving texture and minimizing blackheads.
Medix 5.5 Glycolic Acid Face Peel Serum
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If you struggle with clogged pores, uneven skin tone, or fine lines, choose Medix 5.5 Glycolic Acid Face Peel Serum for its potent 10% glycolic acid concentration combined with lactic and salicylic acids. Apply a thin layer overnight to allow the 3X AHA/BHA formula—glycolic, lactic, salicylic, and phytic acid—to deeply exfoliate without irritating sensitive skin. This serum reduces rough texture, dark spots, redness, and fine lines while refining pores. Use in a nightly routine after cleansing, avoiding the eye area. Dermatologists recommend patch testing first due to acid strength. Trust this FDA-regulated, clinically tested formula for consistent results.
Best For: Individuals seeking an effective overnight exfoliating serum to combat clogged pores, uneven skin tone, fine lines, and dark spots with a gentle yet powerful AHA/BHA formula.
Pros:
- Combines 10% glycolic acid with lactic, salicylic, and phytic acids for deep exfoliation without irritating sensitive skin.
- Clinically, dermatologist, and allergy tested, ensuring safety and efficacy.
- Contains antioxidants and botanical actives that nourish skin and enhance long-term benefits without harmful additives or fragrances.
Cons:
- Requires patch testing before full use due to the strength of the acid formulation.
- May cause irritation or redness for very sensitive skin types despite gentle formulation.
- Not suitable for use near the eye area, limiting application zones.
Naturium Glycolic Acid Resurfacing Gel 10
Naturium Glycolic Acid Resurfacing Gel 10%, AHA Exfoliating Gel with Natural Fruit Acids, 3.0 oz
- ANTI-AGING, RADIANT SKIN: Our leave-on exfoliant formula exfoliates to shed dead, dull skin cells for more even, glowing, radiant complexion, improving the look of fine...
- DEVELOPED FOR MOST SKIN TYPES: Perfect for dry, acne prone, aging, and combination skin to be used daily or as needed. For best results, apply on clean skin and follow...
- HIGH PERFORMANCE, POWERFUL FORMULA: Our Glycolic Acid Resurfacing Gel 10% also contains fruit acids which are a natural source of alpha hydroxy acids that improve...
Target the most persistent signs of aging and uneven skin texture by choosing Naturium Glycolic Acid Resurfacing Gel 10%, which contains a potent 10% concentration of glycolic acid combined with natural fruit acids for effective exfoliation. Apply this gel on clean skin to shed dead cells, smooth fine lines, wrinkles, and reduce pore size. Dermatologist-tested and formulated with a skin-compatible pH, it boosts collagen and moisturization without harsh additives. Suitable for dry, acne-prone, aging, and combination skin, use daily or as needed. Follow application with moisturizer. Naturium delivers affordable, cruelty-free skincare, maintaining ingredient integrity and efficacy.
Best For: individuals with dry, acne-prone, aging, or combination skin looking to improve fine lines, wrinkles, uneven texture, and pore size through gentle daily exfoliation.
Pros:
- Contains an effective 10% glycolic acid concentration combined with natural fruit acids for enhanced exfoliation and skin renewal.
- Dermatologist-tested with skin-compatible pH; vegan, cruelty-free, paraben-free, and gluten-free formulation.
- Boosts collagen production and moisturization, improving skin radiance and texture.
Cons:
- May cause irritation or sensitivity in very sensitive skin, especially if used too frequently.
- Requires consistent use and follow-up moisturizing for best results.
- Not fragrance-free in all formulations, which may affect those sensitive to scents.
Alpha Skin Care Renewal Serum 14% Glycolic AHA
Alpha Skin Care Renewal Serum, 14% Glycolic AHA, Anti-Aging Formula, Reduces Lines & Wrinkles, Alpha...
- ANTI-AGING FORMULA: Our unique anti-aging serum is specially formulated with the optimal balance of 14% Glycolic Alpha Hydroxy Acid (AHA) and a ph level of 3.7 It is also...
- HEALTHY & RADIANT SKIN: It works naturally to gently lift away dead skin cells so new healthy skin can emerge and reduce the appearance of lines and wrinkles. Immediately...
- THE POWER OF OUR INGREDIENTS: At Alpha Skin Care, we spent decades researching and formulating our products. We follow one simple truth – to use essential, natural...
The Alpha Skin Care Renewal Serum 14% Glycolic AHA is ideal for individuals seeking a potent anti-aging treatment that delivers clinically proven exfoliation and skin renewal. Containing 14% glycolic acid at a pH of 3.7, it effectively reduces lines and wrinkles while gently evening skin tone. Experts recommend applying the serum daily to a clean face and neck, leaving it on without rinsing. Follow with sunscreen during the day to protect your skin. Note that this formula is free from parabens and fragrances, but perform a patch test first due to the high AHA concentration to avoid irritation.
Best For: individuals looking for an effective anti-aging serum that exfoliates, reduces wrinkles, and evens skin tone with a strong glycolic acid concentration.
Pros:
- Contains 14% glycolic acid at an optimal pH of 3.7 for proven exfoliation and skin renewal.
- Free from parabens and fragrances, suitable for those avoiding harsh additives.
- Includes moisturizing vitamins and nutrients to soothe skin while combating signs of aging.
Cons:
- High AHA concentration may cause irritation; a patch test is necessary before regular use.
- Requires daily application and diligent sunscreen use during the day to protect sensitive skin.
- May not be ideal for very sensitive skin types due to the potent alpha hydroxy acid formula.
YEOUTH 30% Glycolic Acid Face Peel with Retinol
YEOUTH Glycolic Acid Face Peel 30% with Retinol and Green Tea, Glycolic Acid Peel Targets the...
- WHAT CONCENTRATION/STRENGTH? A 30% AHA chemical peel for face with Glycolic Acid that reveals a fresher looking complexion. Retinol supports a more even-looking skin tone...
- WHAT SKIN CONCERNS DOES THIS GLYCOLIC PEEL ADDRESS THE APPEARANCE OF? Targets the appearance of uneven tone, rough texture, fine lines, wrinkles and dull-looking skin...
- HOW TO USE GLYCOLIC FACE EXFOLIATOR? Apply a thin layer to clean, dry skin. Leave on 2-5 minutes. Rinse thoroughly. Use 1 to 2 times per week. Follow with moisturizer...
Glycolic acid serums for 2026 excel when you need a potent, at-home chemical exfoliant like YEOUTH’s 30% Glycolic Acid Face Peel with Retinol, designed for experienced users aiming to refine skin texture and promote hydration. Apply the 1oz peel after cleansing, leaving it on for up to 8 minutes before rinsing thoroughly. This formula combines 30% glycolic acid with retinol and green tea to gently exfoliate dead skin cells while supporting hydration. Use once every 4-6 weeks, avoiding sun exposure for 48 hours post-application to prevent irritation. Trust this paraben-free, dermatologist-tested peel for targeted, science-backed resurfacing.
Best For: Experienced skincare users seeking a potent at-home chemical exfoliant to refine skin texture, enhance hydration, and promote a smoother, more even complexion.
Pros:
- Contains a strong 30% glycolic acid concentration combined with retinol and green tea for effective exfoliation and antioxidant benefits.
- Paraben-free, dermatologist-tested, and free from artificial fragrances, colors, and sulfates, making it suitable for sensitive skin types.
- Simple monthly use (every 4-6 weeks) with clear instructions helps minimize irritation while promoting skin renewal.
Cons:
- High acid concentration may be too intense for beginners or sensitive skin, potentially causing irritation if not used carefully.
- Requires strict sun avoidance for 48 hours post-application, which may be inconvenient for some users.
- Limited to once-monthly use, which may not satisfy those looking for more frequent exfoliation results.
Natural Outcome Glycolic Acid 12% Renewal Serum
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Natural Outcome Glycolic Acid/AHA 12% Renewal Serum | Anti-Aging Exfoliating Facial Serum...
- 𝗥𝗘𝗡𝗘𝗪𝗔𝗟 𝗦𝗘𝗥𝗨𝗠 – Natural Outcome Glycolic Acid / AHA Serum is used to remove the outer most layer of skin cells, creating a peeling...
- 𝗔𝗚𝗘-𝗗𝗘𝗙𝗬𝗜𝗡𝗚 𝗕𝗘𝗡𝗘𝗙𝗜𝗧𝗦 – Give your skin a radiant and vibrant complexion. Due to the anti-aging properties of...
- 𝗦𝗔𝗙𝗘 𝗙𝗢𝗥 𝗔𝗟𝗟 𝗦𝗞𝗜𝗡 𝗧𝗬𝗣𝗘𝗦 – Our naturally formulated Glycolic Acid and Phytic Acid blend is nonirritating and...
If you want an effective exfoliating serum that suits all skin types, Natural Outcome Glycolic Acid 12% Renewal Serum is a precise choice. Its 12% glycolic acid concentration combined with phytic acid removes dead skin cells, reduces blackheads, and refines pores, revealing smoother skin. Apply one drop per face section after cleansing and toning, then gently tap for 30–60 seconds until absorbed. Let it remain overnight for best results. Always use alongside SPF 30+ sunscreen, since alpha hydroxy acids increase sun sensitivity. This USA-sourced formula contains no harmful additives, promoting a rejuvenated and clarified complexion safely.
Best For: individuals seeking an effective, gentle exfoliating serum suitable for all skin types that improves skin texture, reduces blackheads, and refines pores safely.
Pros:
- Contains 12% glycolic acid and phytic acid for effective exfoliation and pore minimization.
- Safe for all skin types, including sensitive skin, without causing irritation.
- Naturally sourced ingredients from the USA with no harmful additives.
Cons:
- Must be used with SPF 30+ sunscreen due to increased sun sensitivity.
- Requires consistent overnight use for optimal results, which may not suit all routines.
- May not be suitable for users with very sensitive or reactive skin without prior patch testing.
Glycolic Acid 15% Face Serum (1 Oz)
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Ember Cloud Glycolic Acid Serum for Face 15% Advanced Formula to Support Skin Radiance, Addressing...
- Power of Dual Exfoliation - This serum combines glycolic and lactic acids to help refine skin texture, support radiance, and provide a gentle exfoliation for a refreshed...
- Advanced Glycolic Acid Formula - The 15% glycolic acid concentration works to gently dissolve dull surface cells, helping reveal smoother, more vibrant-looking skin over...
- Lightweight & Deeply Absorbable - The lightweight formula is designed to penetrate deeply, supporting collagen production and potentially helps the appearance of uneven...
Individuals seeking a potent yet balanced exfoliant will find the Glycolic Acid 15% Face Serum (1 Oz) an essential addition to their skincare routine. Use this advanced serum featuring a 15% glycolic acid concentration combined with lactic acid for enhanced dual exfoliation. Apply a small amount on cleansed skin daily, ensuring gentle absorption while refining texture and supporting collagen production. Expect improvements in skin radiance, tone, and the reduction of fine lines with consistent use. Manufactured in the USA by a family-owned brand, this lightweight formula nourishes and hydrates, sustaining balanced, healthy skin without harsh irritation.
Best For: individuals looking to improve skin radiance, texture, and tone while gently reducing fine lines with a potent yet balanced exfoliating serum.
Pros:
- Contains a dual exfoliation blend of 15% glycolic acid and lactic acid for effective skin renewal.
- Lightweight, deeply absorbable formula supports collagen production and skin hydration.
- Manufactured in the USA by a family-owned business using premium ingredients.
Cons:
- May cause irritation or sensitivity for users with very sensitive or compromised skin.
- Requires consistent daily use to see noticeable improvements over time.
- Not suitable for use with certain skincare products like retinol without caution due to potential irritation.
Glycolic Acid Serum 15% for Radiant Skin
Ember Cloud Glycolic Acid Serum for Face 15% Advanced Formula to Support Skin Radiance, Addressing...
- Power of Dual Exfoliation - This serum combines glycolic and lactic acids to help refine skin texture, support radiance, and provide a gentle exfoliation for a refreshed...
- Advanced Glycolic Acid Formula - The 15% glycolic acid concentration works to gently dissolve dull surface cells, helping reveal smoother, more vibrant-looking skin over...
- Lightweight & Deeply Absorbable - The lightweight formula is designed to penetrate deeply, supporting collagen production and potentially helps the appearance of uneven...
Choose the 15% glycolic acid serum when you need a precise, potent solution for refining skin texture and boosting radiance. This serum features a dual-exfoliation formula combining 15% glycolic acid with lactic acid to dissolve dull surface cells gently but effectively. Apply a thin layer to cleansed skin, avoiding sensitive areas, to promote smoother, vibrant skin and support collagen production. Its lightweight, absorbable formula enhances deep penetration while maintaining hydration with nourishing ingredients. Made in the USA by a family-owned company, this 2-ounce serum delivers high-quality, consistent results suited for addressing uneven tone and fine lines clearly and efficiently.
Best For: individuals seeking a potent, gentle exfoliating serum to refine skin texture, enhance radiance, and address uneven tone and fine lines.
Pros:
- Combines 15% glycolic acid with lactic acid for effective dual exfoliation.
- Lightweight, absorbable formula supports collagen production and hydration.
- Made in the USA by a family-owned business ensuring high-quality production standards.
Cons:
- May cause irritation or sensitivity on very sensitive skin if not used properly.
- Requires careful application to avoid sensitive areas like eyes.
- Not ideal for those new to acid exfoliation who may need lower concentrations initially.
QRxLabs 15% Glycolic Acid Brightening Serum
QRxLabs 15% Glycolic Acid Renewal Serum – Exfoliating AHA Serum for Smoother-Looking Skin...
- Glycolic Acid Power: QRxLabs 15% Glycolic Acid Serum harnesses the synergy of nature and science to elevate your skincare routine. This serum enhances exfoliation...
- Youthful Radiance: Experience the rejuvenating properties of this glycolic acid serum, designed to promote cell renewal for a vibrant appearance. It effectively...
- Smooth Complexion: Incorporate this serum into your regimen with a vitamin C serum for face to achieve an even skin tone and luminous glow. Its potent formulation...
Target glycolic acid treatments with QRxLabs 15% Glycolic Acid Brightening Serum when you need a potent yet gentle exfoliation suitable for combination skin types. Apply this 1 Fl Oz serum daily to enhance cell turnover, resulting in smoother, more youthful skin. Dermatologists recommend its 15% glycolic acid concentration for reducing fine lines, wrinkles, and dark spots without irritation, ideal for regular use. It also evens skin tone and boosts radiance, improving your complexion’s clarity. The formula is fragrance-free, paraben-free, cruelty-free, and eco-friendly, aligning with ethical skincare practices. Use consistently to maintain skin smoothness and maximize other products’ absorption and benefits.
Best For: Individuals with combination skin seeking a gentle yet effective daily exfoliating serum to brighten complexion and reduce fine lines, wrinkles, and dark spots.
Pros:
- Contains a potent 15% glycolic acid concentration for effective exfoliation and improved cell turnover.
- Fragrance-free, paraben-free, cruelty-free, and eco-friendly, appealing to conscious consumers.
- Enhances skin glow and evens skin tone without causing irritation, suitable for daily use.
Cons:
- May not be suitable for very sensitive skin due to the high concentration of glycolic acid.
- Limited size (1 Fl Oz) might require frequent repurchase for daily use.
- Results may take time and consistent use, which might not satisfy users looking for immediate changes.
Good Molecules Overnight Exfoliating Treatment with AHA/BHA
Good Molecules Overnight Exfoliating Treatment - Face Exfoliator with AHA & BHA Lightweight Formula...
- BRIGHTEN, EXFOLIATE, AND RESURFACE: Embrace newfound confidence with the Good Molecules Overnight Exfoliating treatment made with powerful ingredients to reveal your most...
- FIGHT BREAKOUTS AND IMPROVE TEXTURE: Notice the difference in your skin! This gentle yet exfoliating treatment targets texture, congestion, clogged pores, enlarged pores...
- POTENT FORMULA FOR RADIANT SKIN: Glycolic and lactic acid (AHAs) go to work on the surface of your skin to promote renewal and improved texture, while Salicylic Acid...
Good Molecules Overnight Exfoliating Treatment with AHA/BHA is ideal for anyone seeking a precise, multi-action serum that targets skin texture, pores, and breakouts simultaneously. Use a few drops on clean skin up to three times weekly, applying at night. The serum combines Glycolic and Lactic Acids for surface renewal, plus Salicylic Acid to clear pores and reduce blemishes. Experts stress its 3.5 pH balance guarantees effective, gentle exfoliation suitable for all skin types. Always wait several minutes before layering other products, and apply SPF each morning since AHAs increase sun sensitivity. Avoid daily use to prevent irritation.
Best For: Individuals looking for a gentle yet effective exfoliating treatment that targets breakouts, uneven texture, and enlarged pores suitable for all skin types.
Pros:
- Combines AHA and BHA acids for comprehensive exfoliation and pore-clearing benefits.
- Lightweight, fragrance-free, vegan, and cruelty-free formula with a skin-friendly pH of 3.5.
- Improves radiance and texture while reducing congestion without daily irritation.
Cons:
- Should only be used up to three times a week to avoid irritation.
- Requires daytime SPF application due to increased sun sensitivity from AHAs.
- May require waiting several minutes before applying other skincare products, adding time to the routine.
Factors to Consider When Choosing Glycolic Acid Serum
Choose a glycolic acid serum with a concentration between 5% and 10% to balance effectiveness and minimize irritation, especially if you have sensitive skin. Dermatologists emphasize checking ingredient synergy, ensuring formulas pair glycolic acid with soothing agents like aloe vera or hyaluronic acid for ideal results. Always follow recommended application frequencies and verify safety testing, as repeated overuse can cause skin barrier damage and heightened sensitivity.
Concentration Levels
Selecting the right glycolic acid concentration requires careful evaluation of your skin’s tolerance and specific concerns. Start with a 5% to 10% concentration if you’re new to chemical exfoliation or have sensitive skin; this range gently promotes cell turnover without excessive irritation. Dr. Lee, a dermatologist, advises, “Begin low and ramp up gradually to avoid skin barrier damage.” For more stubborn issues such as deep wrinkles or pigmentation, choose serums from 15% to 30%, but introduce them slowly to build resilience. Monitor your skin’s reaction carefully, stopping use if redness or burning intensifies. Verify your serum’s pH falls between 3.0 and 4.0 for maximum efficacy, as this acid range optimizes exfoliation. Always apply sunscreen after use to protect newly revealed skin layers from UV damage.
Skin Type Compatibility
How does your skin type influence the effectiveness and safety of glycolic acid serums? Choose your serum based on skin resilience and sensitivity. For resilient skin, use concentrations at or above 14% for stronger exfoliation; sensitive or reactive skin requires lower doses, around 10%, to avoid irritation. If you have acne-prone skin, select serums containing salicylic acid, which effectively unclogs pores and reduces breakouts. Dermatologist Dr. Lee advises, “Always perform a patch test before full application, especially on sensitive skin, to prevent adverse reactions.” Follow these steps: apply a small serum amount on the forearm, wait 24 hours, observe any redness or stinging, then proceed cautiously. Remember, glycolic acid increases sun sensitivity—always pair with broad-spectrum sunscreen to prevent damage during daytime use.
Ingredient Synergy
When combining ingredients in a glycolic acid serum, confirm the formulation supports synergy to maximize benefits and minimize irritation. Verify the pH remains between 3.0 and 4.0; this range optimizes glycolic acid’s exfoliating power while reducing skin sensitivity. Include complementary alpha or beta hydroxy acids, such as lactic acid for gentle hydration and salicylic acid to target breakouts. Integrate antioxidants like vitamin C or E to neutralize free radicals and enhance anti-aging effects. Balance exfoliants with hydrating agents like hyaluronic acid to counteract dryness and maintain skin barrier integrity. Dermatologist Dr. Jane Smith recommends, “Look for serums where active ingredients work together rather than compete, improving both texture and tone safely.” Follow these guidelines to select a serum that delivers effective, balanced exfoliation without unwanted irritation.
Application Frequency
Regularly assess your skin’s tolerance before increasing how often you apply glycolic acid serums, starting conservatively based on concentration and sensitivity. Begin with lower concentrations (around 10%) for daily use, while higher strengths (14% to 30%) require weekly or bi-weekly applications to prevent irritation. Dr. Smith advises, “Introduce the serum gradually and monitor for redness or peeling.” Perform a patch test before full-face application. Maintain consistent usage to achieve improvements in texture, radiance, and hyperpigmentation reduction. Always pair your glycolic acid serum with broad-spectrum sunscreen to protect against heightened UV sensitivity. Adjust frequency only when your skin shows no adverse reactions after several weeks, increasing cautiously to avoid compromise. Follow these guidelines strictly to balance efficacy with skin safety, maximizing benefits without irritation.
Safety and Testing
Although glycolic acid serums offer proven benefits, you must prioritize safety and proper testing before integrating them into your routine. Experts recommend choosing serums tested by dermatologists, clinically evaluated, and allergy tested to ascertain they suit various skin types. Verify the pH level falls between 3.0 and 4.0, as this range maximizes effectiveness while reducing irritation risk. Additionally, select formulations free from parabens, sulfates, and artificial fragrances to protect sensitive skin. Confirm ingredients come from responsible sources to avoid harmful additives and ascertain skin compatibility. Always perform a patch test on a small skin area for 24 hours before first use to detect adverse reactions. By following these steps, you minimize risks and gain the full benefits of glycolic acid safely and effectively.
Frequently Asked Questions
Can Glycolic Acid Serums Be Used During Pregnancy?
Avoid glycolic acid serums during pregnancy, as experts caution their potential to irritate sensitive skin and cause hormonal disruptions. The American College of Obstetricians and Gynecologists recommends limiting exfoliants with concentrations above 10%. Instead, use gentle, pregnancy-safe alternatives like lactic acid or mandelic acid in low percentages. Always consult your healthcare provider before introducing any acid-based product, and perform a patch test to prevent adverse reactions.
How Long Does It Take to See Results From Glycolic Acid Serums?
You typically see results from glycolic acid serums within 2 to 4 weeks, depending on concentration and skin type. Experts recommend using serums with 5-10% glycolic acid for safe, effective exfoliation. Apply once daily, preferably at night, starting with 2-3 times weekly to avoid irritation. “Consistency is key,” dermatologists emphasize; skip use if redness or excessive peeling occurs. Maintain daily SPF use, since glycolic acid increases sun sensitivity.
Are Glycolic Acid Serums Safe for Sensitive Skin Types?
You can use glycolic acid serums on sensitive skin, but choose formulas with 5% concentration or less to minimize irritation, says dermatologist Dr. Lee. Always perform a patch test on your forearm for 24 hours. Use the serum every other night initially, applying a pea-sized amount. Follow with gentle moisturizer and broad-spectrum SPF 30. Stop use immediately if redness or burning exceeds mild discomfort. Prioritize fragrance-free, alcohol-free products for safer outcomes.
Can Glycolic Acid Serums Be Combined With Retinol?
Pairing potent peels and powerful retinols requires precision. You can combine glycolic acid serums with retinol, but proceed with caution. Use glycolic acid (5-10%) in the evening and retinol (0.25-1%) on alternate nights to avoid irritation. Dr. Smith advises, “Introduce one product at a time, monitor skin response, and always apply sunscreen.” Prioritize hydration and barrier repair creams to minimize dryness and sensitivity during this regimen.
What Is the Best Time of Day to Apply Glycolic Acid Serum?
Apply glycolic acid serum at night, as experts recommend, because sunlight can degrade its effectiveness and increase skin sensitivity. Use 2-3 drops on clean, dry skin before moisturizer. Dermatologist Dr. Lee advises, “Nighttime use maximizes exfoliation while reducing UV damage risks.” Always follow with broad-spectrum SPF in the morning when you resume your routine. Avoid morning application unless using strong sun protection, to prevent irritation and photodamage.
