Hey guys! I'm back with a review about Cosrx Real Fit Vitamin Serum. I received this products from the brand when I applied for the review program. What I have here are the Retinol (.5 Retinyl Palmitate) Serum, Vitamin C (23%) Serum and Vitamin E (20%) Serum. These serums are concentrated that's why its 20ml amount will goes a long way. The Vitamin C serum should be consume 2months after you open it while the Retinol and Vitamin E has 3months shelf life after opening. Thoughts: Retinol Serum Contains .05% Retinyl Palmitate and 72.5% Calendula Officinalis Extract, these are skin soothing,refining brightening and firming ingredients. It has a milky texture that slightly viscous, it absorbs quickly and feels good on skin. It has a faint scent that I think comes from the sunflower seed oil which is also one of its ingredient. It's my first time to try Retinol and I really feel a bit nervous and also excited about it. I use this serum for 2 weeks already at night time, I apply