Login

Cart

Your cart is empty
Major mineral

Chloride

Stomach acid (HCl), fluid and acid-base balance, nerve function

Essential nutrient

Reference intakes (RDA or AI) are set by the National Academies of Sciences, Engineering, and Medicine. Deficiency thresholds come from clinical and WHO guidance.

At a glance

Women, 19-50
2,300 mg (AI)
Men, 19-50
2,300 mg (AI)
Upper limit (adults)
3,600 mg/day (CDRR)
How common is deficiency?
Rare

Food sources

Animal sources
Naturally in meat, fish, eggs, dairy (mainly via salt)
Plant sources
Seaweed, olives, tomatoes, celery, lettuce, rye, salt

Deficiency and testing

Signs of deficiency
Rare: muscle weakness, lethargy, dehydration, metabolic alkalosis, poor appetite, irritability
Who is at higher risk
Prolonged vomiting, diuretic use, certain kidney disorders (Bartter), infants on chloride-deficient formula
How it is tested
Serum chloride; arterial blood gas / bicarbonate; urine chloride
Cut-offs
Serum Cl <98 mmol/L = hypochloremia

Symptoms are not specific. Only a clinician with the right tests can tell whether you are deficient.

Supplement forms

Common forms
sodium chloride (table salt), potassium chloride, oral rehydration solutions, medical IV saline.
More effective
dietary salt and normal food cover almost all needs; correction of low chloride is medical and treats the underlying cause (vomiting, diuretics).
Less effective
separate chloride supplements are not used or needed for healthy adults.

Safety, interactions and halal notes

Safety and interactions
Upper limit for adults: 3,600 mg/day (CDRR). Going above the upper limit over time can cause harm, so check labels and talk to a clinician before high-dose supplements.
Halal note
The nutrient itself is not a halal question. For supplements, check the delivery form: gelatin (pork or non-halal bovine), capsule shells, glycerin, and alcohol-based carriers need halal certification. Ask for the halal certificate, not just a label claim. This is general guidance, not a certification.

Frequently asked questions

How much Chloride do adults need per day?

Women 19-50: 2,300 mg (AI). Men 19-50: 2,300 mg (AI). Upper limit: 3,600 mg/day (CDRR). Needs change with age, pregnancy and health conditions.

What are the signs of Chloride deficiency?

Rare: muscle weakness, lethargy, dehydration, metabolic alkalosis, poor appetite, irritability. These signs are not specific, so only a clinician with the right tests can confirm a deficiency.

What are the best food sources of Chloride?

Animal sources: Naturally in meat, fish, eggs, dairy (mainly via salt). Plant sources: Seaweed, olives, tomatoes, celery, lettuce, rye, salt.

Which form of Chloride supplement is best?

dietary salt and normal food cover almost all needs; correction of low chloride is medical and treats the underlying cause (vomiting, diuretics).

Sources

  1. National Academies: Dietary Reference Intakes

← Back to the full nutrient guide

This page is for education only and is not medical advice. These statements have not been evaluated by the Food and Drug Administration. Supplements are not intended to diagnose, treat, cure or prevent any disease. Talk to a qualified clinician before starting a supplement, especially if you are pregnant, breastfeeding, take medicine or have a medical condition. Daily needs are US reference intakes for adults 19-50.

Share this page