Q: Too much sodium in your diet is bad.  Can you have too little sodium in your diet?  What are the side effects?

A: A low blood sodium level is called Hyponatremia.

Common reasons for Hyponatremia:

  • Excess water in the body which dilutes the normal sodium concentration
    • From consuming large amounts of water during strenuous exercise
    • From chronic diseases like kidney failure or heart failure that lead to water retention
  • Prolonged sodium loss due to sweating, vomiting, or diarrhea
  • Medical conditions such as Cirrhosis or Addison’s disease
  • Or medications such as diuretics

Side effects of prolonged/chronic Hyponatremia:

  • Headaches
  • Weakness
  • Muscle cramps
  • Diminish mental acuteness

Notice that a regular diet low in sodium is not a common reason for Hyponatremia.  As a matter of fact, the CDC has concluded that 90% of children and 89% of adults in the United States consume more than the recommended limits for sodium.  The main culprits are eating out, processed food, and pre-packaged foods.  Too little sodium from nutritional habits is usually not an issue.

The following websites were used in answering the question:
http://www.medicinenet.com/hyponatremia/article.htm
http://www.mayoclinic.org/diseases-conditions/hyponatremia/basics/definition/con-20031445
http://www.huffingtonpost.com/dr-david-samadi/americans-are-still-eating-too-much-salt_b_8964232.html