This is a nice watery serum. The AHA in this product is apple and sea buckthorn water + glycolic acid. Vitamin C is the last ingredient, so don't expect really anything on that matter. I tested the PH, which is of 3,5. This is ideal for that type of product, because it allows the AHA to be active. Overall, a nice product I would recommend to use on a daily basis, after your acid toner. This is also a big bottle for the price, and that I like a lot :-D