Sodium Information and Side Effects
A mineral needed by the body to keep body fluids in balance. Sodium is found in table salt and in many processed foods. Too much sodium can cause the body to retain water.
... Why get tested?
To determine whether your sodium concentration is within normal limits and to help evaluate electrolyte balance and kidney function; to monitor chronic or acute hyper- or hyponatremia (high or low sodium levels)
When to get tested?
If you are experiencing dehydration, edema, problems with blood pressure, or have non-specific symptoms; often part of routine laboratory evaluations; also to monitor certain chronic conditions, like high or low blood pressure
A blood sample drawn from a vein in the arm or, in some cases, a urine sample
Lab Tests Online - more...
11 neon â† sodium â†’ magnesium Li â†‘ Na â†“ K periodic table ...
Wikipedia - [full article]