I'm pretty sure that eating less / intermittent fasting will help with Diabetes Type 2 (insulin resistance). Probably not with Type 1 though (inability to produce insulin), but that quite obviously isn't a healthy person.
A Diabetic is not healthy individual but the best part is Intermittent fasting and cold-showers are some of the few things that help with insulin and prevent diabetes.
[Merriam-Webster] Healthy: enjoying health and vigor of body, mind, or spirit
[Merriam-Webster] Health: the condition of being well or free from disease
[wikipedia] Diabetes mellitus (DM) also known as simply diabetes, is a group of metabolic diseases
You are not in good health / healthy in the manor meant in this thread and OA. You might eat healthy, exercise, whatever but you still suffer from a disease that healthy people do not.
Rejoice, you now know the same definition that nearly everyone else knows (rather than your far less useful personal make-believe definition). No longer will you have trouble communicating the state of your health or comprehension issues understanding other's. Bonus Cup! You are now less ignorant.