What are the top 5 ingredients you need in your skincare regime? Rosie Taylor finds out. There are thousands of skincare products out there and the list of ingredients can be baffling. But there are some key ingredients that experts agree are vital for smooth, clear skin and to fight signs of ageing. Here’s our list of the 5 essentials for great skincare:  1. VITAMIN C What is it? Vitamin C (also known as ascorbic acid) is a naturally occurring antioxidant which we need for cell growth. We get it through our diet – citrus fruit, berries and dark leafy…