GLOSSARY

Mineral Loss Through Sweat is element loss with sweat, determined by volume and concentration, with differing contributions among minerals.

Sweat volume and ion concentrations vary with person, heat, intensity, acclimation and measurement method. Salt on clothing is not a precise loss estimate, and a local patch may not represent whole-body sweat. Plan replacement from session duration, body-mass changes corrected for drinks and urine, tolerance and validated testing when useful, rather than a subjective impression of heavy sweating alone.

Sweat contains potassium and smaller calcium and magnesium amounts alongside sodium and chloride; replacement priorities differ. Skin contamination or collection methods can affect some measurements. A measurable amount does not establish an immediate need for a tablet of that element. Most plans coordinate fluids and sodium with daily meals, while other elements require evidence about meaningful loss and actual dietary adequacy rather than presence alone.

Loss is not confined to sweat: urine, stool, secretions and sometimes bleeding contribute. Different elements use these routes in different proportions, so sweat volume cannot predict every mineral loss. In athletes, consider persistent changes, gastrointestinal illness, medicines and bleeding separately. Replacing one nutrient does not necessarily address the reason for its loss or establish that the rest of the mineral profile is adequate.