frequent urination

For a long time now I have been troubled by frequent urination, especially during night time when I was obliged to get up from my sleep several times to go to the loo. What I observed was that the problem was particularly worse when I had consumed heaps of carbohydrates during the day.
On searching the literature on frequent urination one study caught my attention: it said that if you are on diuretics you can develop an intolerance for glucose (carbohydrate) leading to the body being unable to process the sugar and the sugar therefore building up in the blood stream -- a condition akin to diabetes. (Diabetics of course urinate often)
I had never been on diuretic drugs but I discovered that I had been eating a lot of foods, like certain spices, that were natural diuretics. The solution offered by that study was to discontinue the diuretics, cut down on salt and take potassium supplements. But how does one discontinue foods that one has been used to eating and loved doing so with a bit of salt? Not easy. I reasoned that potassium alone was unlikely to solve the problem and did not try it.
But over the course of time I found a simpler cure -- EXERCISE. Yes, whenever I had done a lot of physical activity during the day I slept mostly undisturbed during the night. This was in keeping too with what people have been saying about exercise, that it lowers the blood sugar level in the body (if not in the brain where it has the opposite effect). I went to Google to find out if anybody else had talked about the benefits of exercise in relation to frequent urination but there seemed to be no one.
Later on I discovered that the cause of the problem was very likely lack of fat in the diet, for whenever I had eaten butter or anything that had been fried, there was no rushing to the bathroom.