The serum with high doses of vitamin C and tranexamic acid makes a lasting improvement in skin’s evenness and gradually fades pigment spots. Use: In the morning and/or evening, after cleansing, apply the serum to the skin and pat it in. Follow with a specific eye cream and moisturizing cream.For better and more effective results on hyperpigmentations: Use sunscreen every morning, for example, Biodroga MI High UV Protection Cream SPF 50. To counteract hyperpigmentation even more effectively, 15% Vitamin C Serum can be used in combination with Biodroga MI Skin Booster 10% Azelaic Serum.We recommend starting by applying one serum alone and then adding the other serum. For example: One serum applied in the morning, the other in the evening. Once the skin has adjusted, it is possible to expand the layering procedure, and both products can be used one after the other in the skincare routine, for instance:Skin Booster 15% Vitamin C Serum, 2. Skin Booster 10% Azelaic Serum, 3. Moisturizing cream, 4. UV protection.Important: Be attentive to the skin's sensitivity - for sensitive skin, the intervals between applications should be slightly longer (e.g., integrate only 15% Vitamin C Serum into the routine every 3rd day). Biodroga Medical Institute Skin Booster 15% Vitamin C Serum 15 m