Apply 2-3 drops onto clean, dry skin in the evening, 2-3 times per week initially. Gradually increase frequency as your skin tolerates it. Always follow with a moisturizer and apply SPF daily, as AHAs can increase sun sensitivity.

Yes, this serum is gentle enough for daily use, both morning and evening. Apply a few drops to clean skin before your moisturizer. It layers beautifully with other L'Bertin products.

Dispense a small amount and gently pat onto slightly damp skin after cleansing and serums. This helps to lock in moisture. It can be used morning and evening.

We recommend using these two serums at separate times of the day (e.g., AHA/BHA in the evening, Niacinamide in the morning) or on alternate nights. If using together, apply the AHA/BHA first, allow it to absorb fully, then follow with the Niacinamide serum. Always listen to your skin.

AHAs (like Lactic, Glycolic, Tartaric Acid in our serum) primarily exfoliate the skin's surface, improving texture and brightness. BHAs (like Salicylic Acid in our serum) are oil-soluble, penetrating deeper into pores to clear congestion and reduce breakouts.

Niacinamide is a powerhouse ingredient known for its ability to minimize pores, reduce redness and inflammation, regulate oil production, and strengthen the skin's barrier function. It contributes to a more even-toned and resilient complexion.

Hyaluronic Acid is a humectant that can hold up to 1,000 times its weight in water. In our gel, it attracts and retains moisture in the skin, providing intense hydration, plumping fine lines, and creating a smoother appearance. Vitamin B5 (Panthenol) further enhances soothing and barrier support.

Apply generously as the final step in your morning skincare routine, at least 15 minutes before sun exposure. Reapply every two hours when exposed to direct sunlight, or more often if swimming or sweating.

Most L'Bertin products have a Period After Opening (PAO) symbol, typically a jar icon with a number followed by 'M' (e.g., 6M, 12M). This indicates how many months the product is good for once opened. For optimal efficacy and safety, please adhere to these guidelines.

While we strive for gentle formulations, please refer to the full ingredient list on each product page. Our products generally avoid added synthetic fragrances, but some natural extracts may have a subtle scent. If you have extreme fragrance sensitivities, please review the complete ingredient list carefully.