I bought this serum few years back from Althea website. Kinda pricey but I bought it anyways because I was sold reading all the good reviews and I have oily skin and large pores. However it did nothing to my skin. My skin was still oily, my pores were still visible. Just glad it didn't give me breakouts. I was halfway thru the bottle then I gave it away to my sister. She has the same skin type as me and she claimed it did wonders for her. Idk, maybe this is what they mean by YMMV (your mileage might vary). I didn't repurchase and my sister also found another good serum half the price after she finished this. Wouldn't recommend if you're on a tight budget.