If food tastes too salty, it can mean that there is too much sodium in the particular food. This is true of many processed foods, according to Health.com. However, if all food tastes too salty, there could be an underlying medical condition that needs to be addressed.
There could be a number of reasons why all food tastes excessively salty. Dehydration is the most likely cause. Colds and allergies that produce postnasal drip are also a possible source of the salty taste. Infections of the salivary glands are frequent among smokers and can cause the saliva to taste abnormally salty.