Journeys: Stomach. Stop 4

Acid meter

How sour is stomach juice? Dip the test strip into each glass and look at the colour!

Water isn't sour. The strip is green.

Lemon juice is sour. The strip is orange.

Stomach juice is even more sour than lemon! The strip is red.

Juice this sour kills most germs in food. And the stomach walls renew themselves every few days, so the juice never eats through them.

water

lemon juice

stomach juice