Does Katsuo Stamina replace electrolytes, water, or carbohydrate fuel?

No. Katsuo Stamina is not a hydration drink, electrolyte replacement, or carbohydrate fuel. For longer training and races, you should still follow an appropriate hydration, sodium and carbohydrate plan based on the event, conditions and your individual needs. Katsuo Stamina should be used alongside—not instead of—your normal race nutrition strategy.