Estimates only. Real losses vary with body size, heat, humidity and effort.
Regulation
How are sports drinks regulated?
In Australia, sports (electrolyte) drinks are regulated as conventional foods under the Australia New Zealand Food Standards Code, administered by Food Standards Australia New Zealand (FSANZ), to ensure they're safe and properly labelled.
Health and nutrition claims made on these products are strictly regulated, including the composition rules that define an electrolyte drink — formulated for the rapid replacement of fluid, carbohydrate and electrolytes during or after 60+ minutes of sustained strenuous physical activity.
