"Neil Gendzwill" wrote
Your body only needs 500 mg of sodium/day. WHO recommends no more than
5 g/day. Your half-pound of jerky contains 6 times what you need, and
60% of the max, never mind the salt you're getting from other places.
Doesn't sound healthy to me.

Salt loss in sweat can be 2 to 3 grams per liter. See the link below. So
if you sweat two pounds (or a kg), you need a fair amount of salt to
replenish.

Ever notice a salty food craving after a long run?

For ultra runners (I'm one) this is pretty important -- I consumed 7+
liters of Gatorade and water in the last 50 miler I did (and I sweated out a
bit more, being several pounds lighter at the finish). This is a lot of
salt to excrete. I took in about 6 grams of salt suppliments during this
run, and got a small amt from the food and gatorade.

sportsmedicine.about.com/cs/nutrition/a/aa030101a.htm