Kiehl's Ultra Pure High-Potency Glycolic Serum 30 ml

The essentials

A precise exfoliating facial serum designed for all skin types, this product from Kiehl's delivers a concentrated 9.8% glycolic acid formula with only seven ingredients. It helps refine texture and minimises the appearance of pores, making it a practical addition to an evening skincare routine. Apply 2–3 drops to clean, dry skin in the evening and follow with a moisturiser if needed. The lightweight serum absorbs quickly and works alongside normal skincare without heavy waiting times, offering a straightforward path to smoother skin. You’ll notice a more uniform look over repeated use, with a focus on gentle renewal rather than dramatic changes. This formulation is suitable for everyday use by those seeking visible refinement without aggressive treatment.

Technical details

Designed as a concentrated exfoliant, this serums relies on glycolic acid to promote desquamation and a refreshed surface. The compact 30 ml bottle is ideal for testing the product before committing to a longer routine, and its simple ingredient list supports repeatability in daily skincare. Consider starting with every other evening to assess tolerance, especially if your routine includes other actives. For best results, use sunscreen during the day as your skin may be more sensitive to light. This product is intended to be used in the evening and should be stored away from direct sunlight to preserve stability. Users often pair it with a hydrating serum and a moisturiser to balance potential dryness.