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From Fellrnr.com, Running tips
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Electrolyte capsules have a number of advantages for replenishing electrolytes lost in sweat.
* They are a convenient and easy to carry in a race.
* Some electrolyte capsules contain more than just sodium and chloride, adding magnesium[[Magnesium]], potassium and calcium to the mix. However, the capsules usually only contain small quantities of other electrolytes and their value mid-race is dubious.
* Anti-acid (AKA buffering agent) is also present in some capsules. This may help limit stomach acidity, but it could also interfere with digestion.
==Disadvantages==
