Ever since I have began using my hyaluronic acid and vitamin C serum in January, my skin has cleared up noticably. I haven't changed anything else in my skincare/diet/supplements etc., so I am sure that this product has made a huge difference. For reference, I am 27 and struggle with congested skin and some mild hyperpigmentation and I get decent breakouts that are hormonal in nature and worse around my cycle. My skin has appeared much less congested and my breakouts in between my period have almost gone away. My skin also feels much smoother as well. The product is effective, affordable, and I have had an overall wonderful experience with it!