You can tell what foods are high in salt because they taste salty
Some foods that are high in salt don't taste very salty. Sometimes this is because they have lots of sugar in them, for example some biscuits and breakfast cereals. Also, our taste buds get used to high levels of salt, so you might not notice the saltiness of some foods. When people get used to eating less salt their taste buds become more sensitive. So sometimes when they eat a food they used to eat all the time, they are surprised to find how salty it tastes.