Once a fad diet, the safety and efficacy of the low-carb diet have now been verified in more than 40 clinical trials on thousands of subjects. Given that the government projects that one in three Americans (and one in two of those of Hispanic origin) will be given a diagnosis of diabetes by 2050, it’s time to give this diet a closer look.

When someone has diabetes, he can no longer produce sufficient insulin to process glucose (sugar) in the blood. To lower glucose levels, diabetics need to increase insulin, either by taking medication that increases their own endogenous production or by injecting insulin directly. A patient with diabetes can be on four or five different medications to control blood glucose, with an annual price tag of thousands of dollars.

Yet there’s another, more effective way to lower glucose levels: Eat less of it.

Glucose is the breakdown product of carbohydrates, which are found principally in wheat, rice, corn, potatoes, fruit and sugars. Restricting these foods keeps blood glucose low. Moreover, replacing those carbohydrates with healthy protein and fats, the most naturally satiating of foods, often eliminates hunger. People can lose weight without starving themselves, or even counting calories.

Most doctors — and the diabetes associations — portray diabetes as an incurable disease, presaging a steady decline that may include kidney failure, amputations and blindness, as well as life-threatening heart attacks and stroke. Yet the literature on low-carbohydrate intervention for diabetes tells another story. For instance, a two-week study of 10 obese patients with Type 2 diabetes found that their glucose levels normalized and insulin sensitivity was improved by 75 percent after they went on a low-carb diet.

At our obesity clinics, we’ve seen hundreds of patients who, after cutting down on carbohydrates, lose weight and get off their medications. One patient in his 50s was a brick worker so impaired by diabetes that he had retired from his job. He came to see one of us last winter, 100 pounds overweight and panicking. He’d been taking insulin prescribed by a doctor who said he would need to take it for the rest of his life. Yet even with insurance coverage, his drugs cost hundreds of dollars a month, which he knew he couldn’t afford, any more than he could bariatric surgery.