Toothpaste on zits is one of the most common myths that dermatologists encounter. It's so popular because it's seemingly safe and very convenient. You don't have to pay for anything, assuming you already have toothpaste in the home.nnThe science behind this myth is a bit interesting. It is true that putting toothpaste on a zit will dry it how. However, it won't do anything to stop a future breakout from happening.nnAlso, toothpaste has several harsh ingredients, including sodium lauryl sulfate. This can clog your pores and actually make your acne even worse!