[sfjailbird]

When insulin stops doing what it's supposed to (= diabetes) then a lot of bad stuff happens. Improving insulin function (insulin sensitivity) is the main principle behind many current diet-based health interventions such as intermediate fasting, keto dieting, apple cider vinegar, and so on.

Diabetes drugs improve or replace the role of insulin, through differing mechanisms, so it makes sense that they would have some of the same benefits.