How Often to Use Lactic Acid
Lactic acid is a gentle chemical exfoliant that works by removing dead skin cells to reveal smoother, brighter skin underneath. Unlike harsher exfoliants, lactic acid is a larger molecule that penetrates the skin more slowly, making it suitable for regular use when applied correctly. Understanding the right frequency is essential to get the benefits without damaging your skin.
Starting Your Lactic Acid Journey
If you are new to lactic acid, begin slowly to let your skin adjust. Most experts recommend starting with lactic acid 2-3 times per week. This frequency allows your skin to build tolerance gradually without overwhelming it. You can apply the product in the evening after cleansing and on completely dry skin. Keep the contact time brief at first, around 5-10 minutes, then rinse with lukewarm water.
As your skin becomes accustomed to lactic acid, you may increase the frequency, but most people should not exceed 3 times per week. Daily use is not recommended because it can lead to over-exfoliation, which damages your skin barrier and causes redness, dryness, and increased sensitivity.
Concentration Matters
The strength of your lactic acid product affects how often you can use it safely. Products with 5-10% lactic acid concentration are considered gentle and suitable for regular use. Higher concentrations require more caution and less frequent application. Always check your product’s concentration and follow the manufacturer’s instructions.
Special Considerations for Sensitive Skin
People with sensitive skin, eczema, or rosacea should be extra cautious. If you have these conditions, stick to lower concentrations and limit use to 1-3 times per week at most. You can also try buffering, which means applying lactic acid over a light layer of moisturizer to reduce irritation. If you experience tingling, redness, or any discomfort, scale back the frequency immediately.
Avoiding Common Mistakes
Never combine lactic acid with other exfoliating products on the same day. Mixing acids or using them alongside strong toners can cause irritation and barrier damage. Space out different exfoliants on separate days if you use multiple products.
Always wear sunscreen with SPF 30 or higher daily when using lactic acid. These products increase your skin’s sensitivity to UV rays, leaving it more vulnerable to sun damage. This is non-negotiable for protecting your skin.
Follow lactic acid application with a good moisturizer, ideally one containing ceramides. Moisturizing after exfoliation helps repair and strengthen your skin barrier. This step is just as important as the exfoliation itself.
Winter and Extreme Conditions
During winter or in harsh weather, your skin is already stressed. On extremely cold or windy days, skip lactic acid altogether and focus on hydration and barrier repair. Even in winter, limit lactic acid use to 1-3 times per week maximum.
Listening to Your Skin
Your skin will tell you if you are using lactic acid too often. Signs of over-exfoliation include persistent tightness, excessive dryness, increased sensitivity, or visible irritation. If you notice these signs, reduce the frequency immediately and give your skin time to recover. Consistency and comfort matter more than pushing for faster results.
The key to successful lactic acid use is patience and balance. Start with 2-3 times per week, monitor how your skin responds, and adjust from there. Most people find that this frequency provides visible improvements in skin texture, brightness, and fine lines without causing irritation or damage.
Sources
https://www.sadanews.ps/en/news/260052.html
https://theordinary.com/en-us/lactic-acid-5-ha-exfoliator-100427.html
https://smytten.com/blogs/skincare/7-winter-safe-acids-for-gentle-skin-exfoliation
https://www.metaskinstudio.com/blogs/news/the-ordinary-peeling-serum
