if you have been a fan of GU's Brew energy and hydration mix, perhaps you should consider their hydration-only mix. Many endurance athletes are separating out their electrolyte intake from their energy products so they can more carefully gauge their ideal requirements and absorption. GU understands this and with the individual packets of their Hydration Drink Mix, you can carefully dose out your hydration needs.

The Hydration Drink Mix is formulated with a blend of electrolytes and carbohydrates which combine with water to create a mild tasting, rapidly absorbed, hydration product. Sodium is the primary electrolyte lost in sweat, is required to aid hydration by maintaining water balance. This 70-calorie serving of GU Hydration Drink Mix contains 250mg of sodium and 30mg of potassium via carbohydrates (maltodextrin and fructose) that use non-competing pathways to help maximize absorption while limiting negative stomach acid reactions.

Simply mix one 19 gram packet with 21oz of water for optimal balance and digestion, and start tracking how much you take in. Working within suggested electrolyte ranges may be a starting point, but if you tend to cramp or feel more dehydrated than you should after a training session, you can up your intake by percentages to determine how much you truly require.