What chloride does
Chloride keeps your body’s fluid balance and acid–base balance in check, and your stomach uses it to make stomach acid.
How much
Adults need roughly 2,300 mg a day — easily covered by the salt in a normal diet. Deficiency only happens with heavy fluid loss, such as severe vomiting.
Sources
Almost all chloride comes from salt (sodium chloride). Tomatoes, celery, olives and seaweed contain some too.
The takeaway
There’s no need to seek out chloride — if anything, most people should eat less salt. See Sodium.