Do you think antacids aren’t tasty? Wait till you taste Gas-O-Fast Guava Flavour. The strong flavour and Yummy taste of guavas add a fruity punch to your drink and provide quick relief from acidity and heartburn. Being high in potassium’ with Since guava is high in potassium, it helps neutralize stomach acids and ease other related symptoms. Next time when acidity hits you, hit it back with Gas-O-Fast Guava flavour.