4.
If you live in a city, you need this product in your beauty cupboard. Yes, SPF every day is a non-negotiable but unfortunately if you live in a city centre, your skin is going to need a bit more protection than that. Combining detoxifying citrus peel and niacinamide, just a few drops of YSL’s serum is all it takes to help protect skin from dust, pollution and UVA/UVB rays.