the composition of the sweat glands

The composition of human sweat is highly variable, both between individuals and within an individual over time. However, sodium and chloride are the major electrolytes lost in sweat, with other ions being present in smaller amounts relative to the whole body status. The sweat electrolyte composition of an individual seems to be related primarily to sweat rate but can be influenced by training status, extent of heat acclimation, and diet. However, the range of values for sweat electrolyte composition reported in the literature probably reflects not only the interindividual differences but also differences in the methodology used for collection of the sweat.