Precision Hydration Lite Electrolyte Drink - Multi Strength Effervescent Hydration Tablets - Low Calorie, Gluten Free, Vegan/Vegetarian Friendly, NSF (1 Tube, 500mg/L - Yellow Tube)FOUR DIFFERENT STRENGTHS containing 250 500 1000 1500 mg of sodium per litre (when mixed with water) to tailor your drink to your personal requirements. LOW CALORIE EFFERVESCENT TABLETS added to water to replace what you lose when sweating ONE TABLET PER 500ml (16oz) of water. 250mg l & 500mg l tubes contain 15 tablets per tube 1000mg l & 1500mg l tubes contain 10 tablets per tube INDEPENDENTLY BATCH TESTED for a wide range of prohibited substances on