Does anyone else who has had their Serum Plasma Biochemistry tested have low sodium ie less than 135 mmol/L and low Osmolarity measures less than 280mmol/L? In recent years mine have been sliding down (as far as 121mmol/L) despite heavily salting all my food and taking salt tablets and electrolytes.
Yes, I had serious hyponatraemia (low blood sodium) for years, and took desmopressin for it, but had a hell of a job getting it and a hell of a job convincing medical staff to test my blood sodium. It was as low as 115 on one hospital admission, i.e. close to losing consciousness. Then last year after having some teeth removed, at least one of which was infected, the problem disappeared, as did my hypertension.