Sunday Riley A+ High-Dose Retinoid Serum

Advanced strength retinoid serum. Ideal for smoother skin. Suitable for all skin types. Bought it full price because wanted to start using retinol, but doctor advised against it due to a medical condition. Willing to let it go for less than half price. Not opened, completely new but don't have the box it came in. Will be sending in a different skincare item box.