Sodium

Sodium is an essential nutrient and is needed by the body in relatively small amounts to maintain a balance of body fluids and keep muscles and nerves running smoothly. Recommends limiting sodium intake to less than 2400 mg per day

Harm

Sodium — often simply referred to as salt — is found in nearly everything you eat and drink.
It occurs naturally in many foods, is added to others during the manufacturing process and is used as a flavoring agent at home and restaurants.
For some time, sodium has been linked to high blood pressure, which causes damage to your blood vessels and arteries when chronically elevated. In turn, this increases your risk of heart disease, stroke, heart failure and kidney disease.
Therefore, several health authorities have established guidelines for limiting sodium intake.