#1. SODIUM CHLORIDE
Sodium chloride is salt, and is naturally present in most foods. Both elements (sodium and chloride) are crucial in controlling the amount of water in the body and its acid/alkali balance. Salt also helps muscular contraction.
Most people eat too much, which can cause higher blood pressure, heart disease, and strokes. Processed food often has a lot of salt, although manufacturers are now reducing their levels.
Check labels: if you see sodium levels in grams, multiply this by 2.5 to get the salt content.
All foods, particularly high in shellfish and processed foods, and table salt.