Maintaining fluid balance
Sodium contributes to this process as part of a balanced pattern of nutrients and healthy body function.
Vitamins & Minerals
Sodium
This page is for education only and does not diagnose or treat a deficiency. Symptoms can have many causes, and laboratory testing may be needed to confirm a nutrient problem.
What Is This Nutrient?
Sodium is a major mineral and electrolyte. The body needs it to carry out essential processes, and an appropriate intake supports normal health without replacing individualized medical care.
Primary Functions
Nerve impulses and muscle contraction
Sodium contributes to this process as part of a balanced pattern of nutrients and healthy body function.
Supporting normal blood volume
Sodium contributes to this process as part of a balanced pattern of nutrients and healthy body function.
Foods Rich In Sodium
Excellent Sources
- Table salt
- Soy sauce
- Bouillon
Good Sources
- Cured meats
- Cheese
- Breads
Additional Sources
- Canned soups
- Restaurant foods
- Naturally occurring sodium in milk and vegetables
Food amounts vary by variety, soil, fortification, brand, preparation, and portion size.
Ways To Support Healthy Levels
Most people need to limit rather than increase sodium. Choose minimally processed foods and follow individualized advice for heavy sweating or medical conditions.
A varied eating pattern is usually the best foundation. Supplements can be useful in specific situations, but the right form and dose depend on age, diet, health conditions, medications, pregnancy, and laboratory results.
Possible Signs Of Deficiency
Possible signs may include:
- Headache, nausea, confusion, or weakness when blood sodium is low
- Seizures can occur in severe hyponatremia and require urgent care
These symptoms can have many causes and do not confirm a deficiency. Consider discussing persistent or concerning changes with a healthcare professional.
Possible Risk Factors For Deficiency
- Excess water intake
- Prolonged sweating, vomiting, or diarrhea
- Diuretics and some psychiatric medicines
- Heart, kidney, liver, or hormone disorders
Restricted diets, digestive disorders, aging, medical conditions, and certain medications can change nutrient needs or absorption. Individual assessment matters.
Possible Signs Or Risks Of Excess Intake
- High habitual intake can raise blood pressure in many people
- Sudden severe blood-sodium changes require medical care
Food and supplements are not interchangeable sources of risk. Keep supplements away from children and follow product labels and professional advice.
When To Speak With A Healthcare Professional
Persistent Symptoms
Discuss ongoing fatigue, weakness, pain, digestive changes, or other symptoms rather than assuming they come from one nutrient.
Neurological Or Heart Symptoms
Promptly seek care for new numbness, severe weakness, confusion, balance changes, fainting, or heart-rhythm concerns.
Supplement Questions
Ask about the appropriate dose, medication interactions, medical conditions, pregnancy, and whether laboratory testing is useful.
Frequently Asked Questions
Can food provide enough?
Often, yes, but needs and absorption vary. Fortified foods or supplements may be appropriate for some diets, life stages, and medical situations.
Should I take a supplement for symptoms?
Symptoms alone cannot identify a deficiency. A healthcare professional can help evaluate causes, testing, and a safe plan.
Can more be harmful?
Yes. Some nutrients interact with medicines or become harmful at high doses. Avoid assuming that a larger dose is better.
Related Articles
More Sodium articles, deficiency guides, food guides, and practical worksheets are coming soon.
Related Resources
Source note: This educational overview is informed by the NIH Office of Dietary Supplements consumer fact sheet for Sodium. Consult qualified healthcare professionals for diagnosis, laboratory testing, treatment, or supplement decisions.