Electrolyte Salt Caps are electrolyte capsules with a unique formulation that deliver the full-spectrum of vital electrolytes (sodium, chloride, potassium and magnesium), and vitamin D3 to sustain optimal bone health and immune function during intense endurance activities like ultramarathons, brevets, and triathlons. Electrolyte Salt Caps are highly bioavailable, immediately releasing an instantaneous supply of essential fueling nutrients.