Guidelines for Adequate Intakes (AI) of sodium were established based on the lowest levels of sodium intake used in randomized controlled trials that did not show a deficiency but that also allowed for an adequate intake of nutritious foods naturally containing sodium. Because of this, a Tolerable Upper intake Level (UL) has not been established a UL is the maximum daily intake unlikely to cause harmful effects on health. Dietary Reference Intakes state that there is not enough evidence to establish a Recommended Dietary Allowance or a toxic level for sodium (aside from chronic disease risk). Most Americans consume at least 1.5 teaspoons of salt per day, or about 3400 mg of sodium, which contains far more than our bodies need. It can also cause calcium losses, some of which may be pulled from bone. But too much sodium in the diet can lead to high blood pressure, heart disease, and stroke. It is estimated that we need about 500 mg of sodium daily for these vital functions. The human body requires a small amount of sodium to conduct nerve impulses, contract and relax muscles, and maintain the proper balance of water and minerals. It is also a food preservative, as bacteria can’t thrive in the presence of a high amount of salt. It flavors food and is used as a binder and stabilizer.

Salt, also known as sodium chloride, is about 40% sodium and 60% chloride.

Hearts of iron 4 minimum requirements