Sodium plays a key role in balancing the levels of fluid in the body by signaling to the kidneys when to retain water and when to get rid of water. A high salt intake may reduce kidney function. The result is less water removed from the body, which may lead to higher blood pressure and may increase the risk of heart attack and strokes.
Too much salt intake affects the digestive system and increases the risk of heartburn, inflammation and hardening of the pancreas and stomach cancers. It also affects the levels of the minerals in your body and calcium absorption, which may lead to osteoporosis.
Finally, high salt intake could be bad for your brain and it may lead to Alzheimer's.
And the question is how much sodium should you eat per day?
There is definitely a consensus among health organizations that we should aim for less than 1500 mg of salt equals about 0.75 teaspoons or 3.75 grams of salt per day. Unfortunately, most people today are eating much more than that.