Expert Q&A

How long have we known that diabetes can be cured by not eating any carbs? Can you guess on a low-carb or ketogenic diet

The Historical Roots of Carbohydrate Restriction for Diabetes

Physicians have recognized the power of carbohydrate restriction to manage and even reverse type 2 diabetes for over 150 years. In the 1860s, Dr. William Banting published his famous "Letter on Corpulence," detailing how eliminating bread, sugar, and starches led to dramatic weight loss and resolution of his diabetic symptoms. By the early 1900s, Dr. Frederick Allen's starvation-style low-carb protocols achieved diabetes remission in many patients before insulin's discovery in 1921. These early approaches understood that removing dietary carbs directly lowered blood glucose and reduced the need for insulin.

Modern research has validated what clinicians observed in the 19th century. In my book The Carb Freedom Protocol, I explain how insulin resistance develops from chronic high-carbohydrate intake, forcing the pancreas to overproduce insulin until beta cells burn out. Removing carbs reverses this cascade. Studies from the 1970s onward, including those by Dr. Robert Atkins and later Dr. Eric Westman, consistently showed that very-low-carb diets normalize blood sugar in 60-80% of type 2 patients within weeks to months.

Low-Carb vs Ketogenic Diets: What the Evidence Shows

A low-carb diet typically limits intake to under 130 grams daily, while a ketogenic diet targets 20-50 grams to induce nutritional ketosis. Both work, but keto often produces faster results for diabetes reversal. In Virta Health's 2018 trial, 60% of participants achieved diabetes remission after one year on a ketogenic protocol, with average A1C dropping from 7.6% to 6.3% and many eliminating medications.

For beginners aged 45-54 facing hormonal shifts like perimenopause or andropause, these approaches address the core issue: excess insulin driving fat storage around the abdomen. My methodology emphasizes sustainable fat adaptation rather than calorie counting, which is crucial when insurance denies coverage and joint pain limits exercise.

Practical Implementation for Real-Life Success

Start with a 30-day strict phase: eliminate grains, sugars, and most fruits while focusing on non-starchy vegetables, healthy fats, and quality proteins. Track fasting blood glucose and ketones using affordable meters. Most see blood sugar stabilization within 7-14 days. For those managing hypertension alongside diabetes, this often lowers blood pressure naturally as inflammation decreases.

Address common beginner hurdles: joint pain improves as weight drops even 10-15 pounds, reducing knee stress by 40-60 pounds per step. Conflicting nutrition advice fades when you focus on one principle—carbs drive insulin, insulin drives disease. No complex meal plans needed; simple combinations like eggs with avocado or salmon with broccoli suffice. In The Carb Freedom Protocol, I provide exact food lists and progression steps tailored for those embarrassed by past diet failures.

Why This Approach Finally Works When Others Failed

Previous diets failed because they didn't address hormonal drivers. Low-carb directly corrects insulin resistance, restores metabolic flexibility, and reduces liver fat within days. Expect 1-2 pounds weekly loss initially, primarily from visceral fat. Long-term data shows 70% sustain remission at two years when carbs remain controlled. This isn't another restrictive plan—it's metabolic restoration accessible to middle-income families without gym memberships or expensive programs.

💬 What the Community Says

The community shows strong interest in historical low-carb approaches for diabetes, with many sharing stories of A1C dropping from 8-10% to under 6% within months on keto after years of failed low-fat diets. Most practitioners aged 45-55 appreciate the simplicity—no calorie tracking, minimal meal prep—but debate rages over long-term sustainability, especially for those with joint issues who can't exercise intensely. A vocal minority worries about nutrient deficiencies or "keto flu" during adaptation, while others report dramatic improvements in blood pressure and energy. Lived experiences frequently mention frustration with conflicting medical advice, relief at finally understanding insulin's role, and success despite insurance limitations. Beginners often ask practical questions about hidden carbs and how to maintain results without feeling deprived.
Cite this answer
Clark, R. (2026). How long have we known that diabetes can be cured by not eating any carbs? Can y. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/how-long-have-we-known-that-diabetes-can-be-cured-by-not-eating-any-carbs-can-you-guess-on-a-low-carb-or-ketogenic-diet
Russell Clark, FNP-C, APRN, FNP-C, APRN
About the Author

Russell Clark, FNP-C, APRN, is the founder of CFP Weight Loss in Nashville and CFP Fit Now telehealth. Over 35 years in healthcare — Army Nurse Reserves, Level 1 trauma ER, hospitalist — he developed a 30-week protocol integrating real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 30–90 pounds. He and his wife Anne-Marie lost a combined 275 pounds using the same protocol.

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