why when you lose weight your blood sugar goes down a lot

improved insulin sensitivity, higher HDL cholesterol, lower triglyceride levels and improved liver function (to name a few). Losing weight is a win, win, win … proposition for everyone, particularly for PWD's.

Excellent reply jigsaw! Also, losing weight means we're making changes in our food choices, eating habits, and activity levels and all of those will also contribute to lower blood sugar levels. Weight loss plus improved blood sugar is a win-win! ~Lynn @Glucerna

One possibility is, when you lose weight in most cases, you simultaneously decrease your insulin resistance. In turn, your body can use glucose more effectively. If you gain weight, your insulin resistance will almost always increase!