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Sodium
The mineral in salt; most people eat more than the recommended limit.
Minerals
Definition
Sodium is an essential mineral that regulates fluid balance and nerve signals, and it is the main component of table salt (sodium chloride). Too much sodium raises blood pressure in many people, which increases cardiovascular risk. The World Health Organization suggests under 2 grams of sodium — about 5 grams of salt — a day, yet typical intakes are far higher, mostly from processed and restaurant food rather than the salt shaker.
Related terms
Electrolyte
Minerals like sodium and potassium that carry the body's electrical signals.
Hydration
Keeping enough body water; thirst and urine colour are good everyday guides.
Micronutrient
Vitamins and minerals the body needs in tiny amounts to function.
Source: World Health Organization sodium-intake guidance. · checked 2026-09-04
Frequently asked questions
What is sodium?
Sodium is an essential mineral that regulates fluid balance and nerve signals, and it is the main component of table salt (sodium chloride). Too much sodium raises blood pressure in many people, which increases cardiovascular risk. The World Health Organization suggests under 2 grams of sodium — about 5 grams of salt — a day, yet typical intakes are far higher, mostly from processed and restaurant food rather than the salt shaker.
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