It has been a very long time since I last wrote about a skincare product review. Recently, I fall in love with a Japanese skincare product – the Obagi C10 Vitamin C serum – and I’m SO excited to share with you. Truth be told, I’ve been using Korean skincare products for many years now. This was the first time in 6 years I added a non-Korean product into my skincare regimen, and it turned out to be a total…