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Types of Electrolytes: Forms & Bioavailability

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Forms Comparison

FormBioavailabilityBest For
Electrolyte Powder/Tablet (e.g., LMNT, Nuun)HighCustomizable concentration — dissolve in water; many options with zero calories
Sports Drink (e.g., Gatorade, Powerade)HighCombined electrolytes + carbohydrates — best for exercise >90 minutes where fuel is also needed
Oral Rehydration Salts (ORS)HighClinical-grade rehydration — WHO formula optimized for maximum fluid absorption via sodium-glucose cotransport
Salt CapsulesHighUltra-endurance events — precise sodium dosing without flavor; popular in ironman and ultramarathon

Electrolyte Powder/Tablet (e.g., LMNT, Nuun)

Bioavailability: High. Best for: Customizable concentration — dissolve in water; many options with zero calories.

Sports Drink (e.g., Gatorade, Powerade)

Bioavailability: High. Best for: Combined electrolytes + carbohydrates — best for exercise >90 minutes where fuel is also needed.

Oral Rehydration Salts (ORS)

Bioavailability: High. Best for: Clinical-grade rehydration — WHO formula optimized for maximum fluid absorption via sodium-glucose cotransport.

Salt Capsules

Bioavailability: High. Best for: Ultra-endurance events — precise sodium dosing without flavor; popular in ironman and ultramarathon.

Full Electrolytes Guide

References

  1. (). Fluid and electrolyte needs for training, competition, and recovery. Journal of Sports Sciences. DOI
  2. (). The influence of drinking fluid on endurance cycling performance: a meta-analysis. Sports Medicine. DOI
  3. (). Muscle cramps during exercise — is it fatigue or electrolyte deficit?. Current Sports Medicine Reports. DOI