the bigger question is "does anything make you suspect a sodium deficiency?" there is plenty of info from Dr. Internet on hyponatremia symptoms, but it's pretty rare in western diets, even big-biking-western-diets. if your blood pressure is fairly normal and you don't exhibit any other symptoms, keep calm and carry on.

i have problems with highly variable blood pressure ("labile BP") and my cardiologist told me to get more salt, which I found hilarious. I use Nuun tablets in my water bottle and that pretty much covers it. good stuff, highly recommended.