I haven’t used the product long enough (1 week) to give a detailed review about my progress but it hasn’t broke me out which is a plus. I was very concerned about my skin reacting poorly so I purchased the 10 %. I leave the vit c in the fridge to prolong it. Shipping also arrived to Vancouver in less than a week!
I’ve only used it a short time but so far so good. I found the 20% a little to strong for my skin - I never seemed to adjust to the subtle burning sensation and found it a little irritating to my skin. So far with the 10%, my face is less reactive so I’m happy with it. I will say though, that a significant brown spot on my face lightened quite a bit using the 20% Vitamin C, so I hope I get similar results with this product.