What is Vitamin A? Why is retinol good for wrinkles? How can I incorporate vitamin A into my routine? At what age should I start using retinol? We caught up with Bridget March, Digital Beauty Editor at Harper’s Bazaar, to answer the most asked questions about vitamin A (retinol). The most asked questions about vitamin A answered by Medik8 experts. When should I use vitamin A in my skincare routine? Many professionals recommend applying vitamin A to clean, dry skin before bed