I have tried 3 different Vitamin C serums before (TIAM C Source Vitamin C Serum, Klairs Freshly Juiced Vitamin C Serum Drops and Ciracle Vitamin Source C-20) and all of them made me break out and burned on my skin like fire.

The Red C serum is the only one that works pretty well on my skin and doesn't cause any problems. I don't break out from it, it doesn't burn on my skin and I could notice that my blemishes and acne scars started to fade slowly. It also calms down my troubled skin a bit. I can't say anything about the whitening effect because I have a very pale skin. The texture of the serum is gel like and it leaves a sticky feeling (it takes a while until it's absorbed). I always mix two drops of the Red C Serum with the Neogen White Truffle Serum in Oil Drop and that works the best for me. I use the Red C Serum everyday in my PM routine. I am not sure if this product is good for sensitive skin but it works really good on my combination and acne prone skin. I should mention that Alcohol is the third listed ingredient!