My skin concern is uneven skintone, sun damage type of pigmentation. I have been using the ordinary vitamin c with Arbutin serum for a few months, that worked really well for me as I noticed my pores were smaller and skin was brighter. Saw this new formula it is supposed to be a vitamin c that absorb by skin easier, thought I d try it out, I am familiar with the texture, slightly sticky but not oily, and the smell was coppery.. Used for a few weeks now didnt see much difference, perhaps the formula with Arbutin works better on pigmentation and also better in price.