EthelkinBeauty review for Pure Vitamin C Serum

A working, but capricious thing! The serum contains 5% of pure (unstable) vitamin C. It is very, very working in terms of lightening pigmentation, post-acne, improving skin tone and stimulating collagen production. However, it is also very unstable (which is logical, haha) and fastidious — if stored incorrectly, it can easily deteriorate. It works perfectly, performs all the declared functions. The dispenser and packaging are convenient.