Vitamin C 6000 w/ Retinol

I think this cost my sister a cute $20 on Gilt because she literally mentioned it, asked if I would want to try it, and threw it on her order while on the phone with me. Needless to say, its...

This is a simple formula: Propylene Glycol, L-AA, Retinol. It's in a 1 oz. brown glass bottle with a glass dropper. Pale champagne color, no odor. This was $20 on Amazon & is well-loved there...