
Each serum contains many, many, many other ingredients beyond what is advertised, for example hyaluronic acid is not pure hyaluronic acid. In fact, Vitamin C Serum had Hyaluronic Acid listed as an ingredient before Hyaluronic Acid Serum listed Hyaluronic Acid as an ingredient. None of the serums had a positive effect on the skin. There doesn't seem to be any change, except maybe my skin flares up even more than before use. Some serums left sticky or dry marks on the skin, especially serum with vitamin C. I've been using this product long enough to try it. unfortunately this means that the return/refund date has already passed. Do yourself a favor and buy another brand's product - a cheap set definitely reflects what you're getting.

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