If you're new to acid exfoliants, start by applying the peel once a week, in the evening after cleansing on dry skin. Use a small amount (a few drops are often enough for the face) and leave it on for the recommended time before rinsing or proceeding with your moisturizer. The 5% lactic acid concentration is considered beginner-friendly because it exfoliates while helping the skin retain moisture, which can reduce the tight feeling associated with stronger acids.
Observe how your skin responds over the next 48 hours. If there's no redness, stinging, or excessive dryness, you can consider using it twice a week after a couple of weeks. The goal is gradual resurfacing, not an intense peel, so consistency over time is more important than frequency. If your skin feels irritated, reduce use to once every 10 days or skip a week. Since acids can increase sun sensitivity, applying SPF every morning is non-negotiable, even on days you don't use the product.
Do not use it on compromised skin (like open blemishes or cuts) or around the eyes. If your current regimen already includes retinoids, other exfoliating acids (like salicylic or glycolic acid), or strong actives, introduce this product thoughtfully to avoid over-exfoliation, which can damage your skin barrier.