Diabetes impacts how your body processes glucose, which is the simplest form of sugar. With diabetes, your body doesn’t produce enough insulin, so you can’t properly convert glucose into energy, and your cells risk starvation. Without enough insulin to move the glucose into your cells, glucose builds up in your bloodstream and leads to high blood sugar levels, which can damage your organs, cells, and tissues over time.
Switching your body’s primary fuel from glucose to ketones not only feeds the cells and gives them a chance to repair, but it also boosts your metabolism and switches your dependence away from glucose. Over time, your cells may be able to respond properly to insulin again.
In a process called gluconeogenesis, your body can use dietary fat and protein to create the small amount of glucose your cells need to survive, so you don’t need to eat carbohydrates to survive. To clarify: there’s no essential sugar (glucose).
How Does Keto Improve Diabetes?
Keto isn’t just another diet; it’s a state of metabolism where you switch your fuel source from glucose (sugar) to fat instead. Carbohydrates turn to sugar in the body and some carbohydrates cause significant blood sugar spikes that can fuel diabetes.
Eating less sugar and carbohydrates means your body has less of a need for insulin, and blood sugar levels can stabilize. Ketogenic diets also help you ditch that excess abdominal (visceral) fat that’s implicated in worsening insulin resistance.
Scientific Evidence for Keto’s Benefits on Diabetes
Both scientifically and anecdotally, the ketogenic diet has shown promise as a treatment for type 1 and type 2 diabetes, prediabetes, and gestational diabetes.
In addition to the overwhelming number of stories you hear online, from friends and family, and on television, impressive studies reveal that going keto improves blood sugar and glycemic control and allows many people with diabetes to reduce or discontinue their medications and insulin. Even compared to other diets like low-glycemic and low-fat diets, keto takes the lead in managing diabetes  .
For example, in a small study, participants with type 2 diabetes followed a ketogenic diet of fewer than 20g of carbs daily for 16 weeks. Participants experienced a drop in triglycerides, HbA1c, and body weight. In just 16 weeks, ten participants reduced their diabetes medications, and seven participants ditched their medications entirely! 
Keto helps overweight people manage diabetes and has more significant beneficial effects than a low-calorie diet . Many randomized controlled trials suggest that a ketogenic way of eating improves diabetes through multiple mechanisms  .