The Naturium Alpha Arbutin Serum 2% ($20) contains two percent alpha arbutin, hyaluronic acid, and niacinamide to target and diminish dark spots and hyperpigmentation gently yet effectively. I was looking forward to using this product since alpha arbutin is a safe alternative to hydroquinone and my skin loved this serum. I used a three to four drops every night and over time, I noticed that my skin looked brighter and my dark spots were fading. The consistency of the serum is slightly thicker than the essence but did not leave my skin feeling stick or tacky. I will continue to use this nightly since it hydrates well while treating my number one concern.