I once bought a fake body cream product, I was angry but good thing I had the previous one with me, so I compared the contents, colour and quality of the cream, the original came with a code while code on the fake one was missing, so I think we should check out for the contents of what you purchased before using, what's the difference between this and the previous one, check out for company trademark, misspelling, if you're purchasing from an online store, check out for reviews from other customers, although it will be hard to differentiate but you'll see the difference if you're a regular customer of that product.