Under 11s

Why does orange juice taste bad after you clean your teeth?

Why does orange juice taste bad after you clean your teeth?

Try this experiment and find out!

Try this mini-experiment. Go and brush your teeth...go on, do it!

Now take a sip of orange juice. What does it taste like?

Most people hate the taste of orange juice after they've brushed their teeth. But what turns the orange juice from tasty to disgusting?

What makes orange juice taste bad?

You tongue can detect different tastes. It detects salty, sweet, sour, bitter and umami.

When you brush your teeth, the toothpaste becomes foamy. The foam is made by a chemical called sodium lauryl sulphate (SLS). SLS makes lots of foam and bubbles that make your teeth feel clean.

SLS makes your sweet taste buds stop working so well. SLS also destroys fats that block your bitter taste buds. SLS hides the sweetness of orange juice and makes it taste bitterer. That's why it tastes horrible after brushing your teeth.

SLS is in most toothpastes. Have a look at the ingredients and see if it's in the toothpaste you use.

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