I am wonder the same ... "Does sodium intake decrease blood sugar?" I have been dieting of late and so decreasing my sugar intake. However this morning I had a cup of coffee with sweetner for the first time on my diet. I struggle with low blood sugar sometimes and am fully confident in my abilities to recognize LOW blood sugar - hot, sweaty, uncomfortable, need to lay down, light headed, hypotension, increased pulse. - However this is not how I felt! I felt warm but not sweaty at all! I was uncomfortable but not light headed. Actually I had a bit of headache (a sign of hyponatremia/low sodium). My pulse was not racing. It was 58-60; my norm is 54-62. I thought about having something sweet, but the thought of sugar just made me feel kinda "sick". I decided I was craving something salty. I know that Potassium (K) helps with insulin to bring glucose/sugar into the cell from the blood stream. I also know that K and Sodium (Na) are inversely opposite in levels; when K is high in the blood stream, Na is low and vice versa. Na is actually needed to bring K into the cell reference the KNa pump.(K likes to be in the cell and Na likes to be out of the cell in the blood stream.) So I thought putting all these truths together might make me feel better if I was indeed experiencing hyperglycemia. (I have not been taught that Na lowers K, but since I have been taught the other truths ... It just kinda made since to me.) So I thought if K with insulin that my body makes helps to bring glucose into the cell and if Na helps K go into the cell then Na would ultimately help insulin go into the cell. So increasing my Na intake would decrease my blood sugar, and I would feel better. After salty green beans and a peanut butter sandwich (Yes, I know 1) weird combo and 2) peanut butter and bread also have carbs/sugar it is complexed carbs and in combo with the Na I would prevent too much of a drop in blood sugar) I started to feel so much better. My headache went away almost immediately, and I felt completely better by 1 to 2 hrs later.
So does this prove that Na intake decreases blood sugar? I'm not sure, but I can tell you the next time I feel like that and sugar doesn't appeal to me ... I'm going for the salty!