Radical Night Repair is a high-potency retinol treatment, and if you haven't been using retinol before, it's important to start using it gradually. Retinol is a powerful ingredient that can be quite effective but may also cause skin sensitivity, dryness, or irritation when you first begin using it. To minimize the risk of adverse effects, consider the following tips when incorporating Radical Night Repair or any retinol product into your skincare routine.