Yes, Pilgrim 10% Vitamin C Face Serum can be used for dull skin. It contains 10% Vitamin C (3-O-Ethyl Ascorbic Acid) and 5% Niacinamide, which help brighten the skin, improve tone, and reduce dullness. The serum is suitable for most skin types, but it’s best to do a patch test before use, especially if you have sensitive skin. Apply it to clean skin, and always use sunscreen during the day for better, safer results.