I don’t think you sweat just normal salt. Electrolyte tabs are potassium, sodium, calcium and magnesium salts.
Whilst electrolytes have been used for many years by athletes and sports professionals, existing products and brands will typically contain only one or two electrolytes, usually in a non-ionically charged form which are not easily assimilated by the body. For optimum benefits and hydration, all four major electrolytes (in particular magnesium) are required in an ionically charged form; in fact electrolytes are only true electrolytes when they are ionically charged as they do not function properly otherwise.
Sweating and physical stress deplete magnesium which works with other electrolytes to prevent muscle cramps and helps the body to properly utilize oxygen, so magnesium replacement is essential for sports people. elete contains a perfectly balanced ionically charged combination of magnesium and the three other major mineral electrolytes (potassium, sodium and chloride), as well as over 60 other naturally occurring trace and ultra trace elements.