What are electrolytes?
Electrolytes are minerals that help the body regulate fluid balance and support normal nerve and muscle function. Sodium is a major electrolyte lost in sweat. You also get electrolytes through ordinary food and drinks.
When can water and meals be enough?
For shorter shifts or work in comfortable conditions without heavy sweating, regular water access and normal meals may cover your needs. Your situation can differ with heat, work intensity, medications and health conditions.
When might an electrolyte drink help?
For several hours of heavy sweating, particularly in hot conditions, NIOSH recommends beverages containing balanced electrolytes. Replacing fluid and sodium matters, but drinking excessively can also be dangerous. Avoid trying to calculate a personal sodium dose from symptoms alone.
Sports drinks, zero-sugar drinks or powders?
Regular sports drinks generally provide carbohydrates as well as fluid and electrolytes. Zero-sugar options can provide electrolytes with little or no sugar. Powder formulations vary widely. Check the specific label for sodium, sugar, prepared serving size and cost; product names are not a reliable guide to the amount you get.
When should you seek help instead of another drink?
Headache, weakness, dizziness and nausea can indicate heat illness or other medical problems, not necessarily low electrolytes. Stop exertion, tell someone and seek medical help if symptoms persist or worsen. Confusion, collapse or seizures in the heat require emergency services and immediate cooling.
Evidence and safety
See NIOSH heat-stress recommendations, OSHA water, rest and shade guidance, and NIOSH heat-illness signs. Follow medical advice if you have a fluid or sodium restriction.