Salt.
salt is essential for human survival. A normal diet includes a daily intake of 10gm (1/2 Oz). The trouble starts when you get rid of it faster than you eat it. The body loses salt in sweat and urine, so the warmer the climate the greater the loss. Physical exertion will increase the loss.
The first sympthoms of salt deficency are muscle cramps, nausia, dissness, and tiredness. the remedy is to take a pinch of salt in a pint of water. Try to add salt tablets to your survival kit, but dont swallow them whole.
you can dilute sea water with plenty of fresh water to increase your salt, a pint of sea water contains about 15gm (3/4 Oz) Of salt. Salt can even be obtained from some plants like in the roots of hickory trees.
If you cant get any of the above, One other way to obtain salt is through animal blood. which is also a good source for minirals.
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