Electrolytes

Supplements · Sports Performance · Supplement, Typed Supps

Not always needed — it depends how much you actually sweat.

Stage by stage

Intake (Powder or drink): Sodium and potassium are absorbed quickly in the small intestine.
Small intestine (Drives water absorption): Electrolytes largely drive how well water is absorbed alongside them.
Bloodstream (Distributed via blood): Distributed through the bloodstream to extracellular fluid throughout the body.
Fluid & cells (Nerve and muscle function): Maintain fluid balance and allow nerve and muscle cells to fire properly.

Sustaining performance and delaying cramp during prolonged, sweaty exercise — moderate evidence. Replacing sodium alongside fluid has reasonable support for endurance efforts beyond roughly 60–90 minutes, particularly in heat or in heavy, salty sweaters.
Rehydrating more completely after heavy sweat loss than plain water — moderate evidence. Sodium helps the body retain ingested fluid, so an electrolyte drink restores hydration better than water alone after large sweat losses.
Being necessary for everyday hydration or short, moderate workouts — insufficient evidence. For most people an ordinary diet replaces day-to-day losses; routine electrolyte products for general 'hydration' are not supported.

During prolonged exercise, aim for a drink providing roughly 300–700 mg sodium per litre of fluid, adjusted to sweat losses

Upper limit: No single UL for a blend; the practical limit is sodium, which most people already over-consume

During or after extended, sweaty exercise.

“Everyone needs electrolyte drinks during any workout.” In reality: For workouts under an hour in moderate conditions, plain water is usually enough.