Glycolic vs Lactic Acid: Selecting a Gentle Exfoliant

Alpha hydroxy acids function by loosening the bonds between surface-level cells, allowing them to slough away more effectively. Glycolic acid possesses a smaller molecular structure, which facilitates deeper penetration into the surface layers. Lactic acid is larger in size, limiting its activity to the outermost portion of the epidermis.

Selecting the appropriate acid depends on your skin's tolerance for these mechanisms. Both serve to improve surface texture and clarify the appearance of pores through mechanical removal of debris.

1. Cleanse the surface. Begin with a clean, dry face. Any moisture remaining on the surface can accelerate the absorption of the acid, increasing the likelihood of irritation. Use a mild, pH-balanced cleanser to remove sebum and atmospheric debris.
2. Apply the selected acid. Dispense a small amount of your chosen formula onto a cotton round or directly into your palms. Apply in an even, thin layer across the face, avoiding the immediate eye area and the corners of the mouth. Focus on areas where texture is most prominent.
3. Allow for complete absorption. Let the product sit on the surface without interference. Do not attempt to wipe it off or apply further products while the acid is settling. This period allows the ingredient to work on the intercellular glue.
4. Apply a simple moisturizer. Once the skin feels dry to the touch, apply a simple, fragrance-free moisturizer. This provides a barrier to support the surface integrity. Choose a formula devoid of additional active ingredients to prevent unwanted interactions.
5. Observe the schedule. Repeat this process no more than twice per week. Over-exfoliation is a common error that compromises the surface barrier. Start with once weekly to assess your individual response.

Exfoliation is about consistency, not intensity.