Systems and methods relating to monitoring body fluid components and parameters are provided. A product for reducing muscle cramps comprises: a packaging comprising a consumable composition having at least one salt； a tester associated with the packaging, said tester including a test portion configured to be exposed to body fluid for use in obtaining a result indicative of an estimated degree of salt depletion from a test subject； a test chart associated with the packaging configured to be compared with the tester after exposed to the body fluid to provide a test result of an estimated degree of salt loss； and dosage information regarding the consumable composition based on the test result for salt replenishment sufficient to substantially limit muscle cramping.
