There are several different types of vitamin C that are used in skincare products, including L-ascorbic acid, sodium ascorbyl phosphatem ascorbyl palmitate and retinyl ascorbate. The former, L-ascorbic acid, has the most amount of scientific research surrounding its benefits and is deemed 'the king' of vitamin C. L-ascorbic acid boosts collagen production and smooths and firms skin, as well as fending off photo-ageing. However, any type of vitamin C in your moisturising serum and lotion will offer some skin benefit.
It's worth noting that when antioxidants, such as vitamin C, are exposed to light and air too frequently they can break down, so it's best to opt for formulas in air-tight packaging, pumps or single-use, individually wrapped products.
How should you use vitamin C?
To protect your skin from UV damage and environmental aggressors, vitamin C is more commonly recommended for your morning regime, however you can use it at night as there is some research to say that free radical damage continues to effect your skin overnight. If you're using glycolic or salicylic acid and retinol, you will need to leave some time in between before applying your vitamin C product to avoid any stinging or redness.