Make your OJ taste weird Try this.Go and brush your teeth.Then drink some orange juice.What does it taste like? Most people don't like how orange juice tastes after brushing their teeth. But what makes the orange juice taste so had? YOur tongue can sense five kinds of tastes:salty,sweet,sour,bitter and umami. When you brush your teeth,the toothpaste turns into foam in your mouth. The foam is made of sodium lauryl sulphate(SLS,).SLS helps to clean your teeth. However,SLS makes your sweet taste buds stop working while making your bitter taste buds work better.So,your orange juice tastes less sweet,and even a little bitter.