Do you really need a DNA test to tailor you a skincare regime? Dr A. Bolin investigates. We’ve all heard of a paternity testing – the DNA test used to check if your father really is indeed your biological father. And it seems the sky is the limit when it comes t applying these tests with targeted DNA tests now being touted for everything from family ancestry, fitness and nutrition and even dating. But, when it come to skin, what can these quite pricey tests tells us and is that information really worth any more than an good chat with a skincare…