I’ve used this once so far, but can already see results with my hyperpigmentation from that single use. The capsules burst super easily and melt away into the skins It contains a vitamin C derivative, niacinimide, and tranexamic acid, which is super super impressive for a k-beauty product. It also contains centella which is awesome for calming the skin. I have very sensitive and dry skin and I saw no negative side effects from using this product. It’s a thin serum that absorbs really easily into the skin. Cant wait to see the long term results of using this product. Not to mention it comes in a 100ml size, which is an insane amount of product. Love this.