This is my first serum with vitamin C. My skin is a combination type, sensitive, there are foci of rosacea.  I chose this product, because here vitamin C is presented in a non-acidic form and its content is not high. There are also many natural ingredients in the composition, especially pleased with niacinamide. I haven't had a chance to try it yet, but I hope it will work. Store in a dark, cool place and do not forget that applying sunscreen is mandatory!