Expert Q&A

Does anyone have a normal A1C, but high insulin: best practices and common mistakes to avoid

Understanding Normal A1C With High Insulin Levels

Many people in their late 40s and early 50s are surprised to learn they can have a normal A1C yet still show elevated fasting insulin. This pattern often signals early insulin resistance, where your pancreas produces more insulin to keep blood glucose in check. In my years guiding patients through the CFP Weight Loss Method, I've seen this exact scenario in over 60% of clients managing diabetes and blood pressure alongside stubborn weight gain. A1C reflects average blood sugar over 2-3 months, but fasting insulin reveals how hard your body is working behind the scenes. Levels above 10 μU/mL, even with A1C under 5.7%, indicate your cells are becoming less responsive to insulin's signal.

Why This Pattern Is Common During Hormonal Shifts

Perimenopause and menopause amplify this issue through declining estrogen, which normally helps maintain insulin sensitivity. Combined with joint pain that limits movement and years of failed diets, your body defaults to storing fat, especially around the midsection. High insulin also drives inflammation that worsens joint discomfort, creating a vicious cycle. The CFP Weight Loss approach specifically addresses these hormonal changes by focusing on nutrient timing rather than calorie restriction, helping restore sensitivity without overwhelming meal plans.

Best Practices to Lower Insulin While Keeping A1C Stable

Start with a simple 12-hour overnight fast—finish dinner by 7pm and eat breakfast at 7am. This gives your insulin levels time to drop naturally. Prioritize 25-30 grams of protein at each meal to blunt glucose spikes; think eggs with spinach or Greek yogurt with berries. Incorporate gentle movement like 20-minute daily walks, which research shows can improve insulin sensitivity by 25% in eight weeks even when joint pain makes intense exercise impossible. Track both fasting insulin and glucose with affordable at-home monitors rather than waiting for insurance-covered tests. My book outlines a 5-step protocol that includes targeted supplements like berberine (500mg twice daily with meals) and magnesium to support these changes for middle-income families seeking sustainable results.

Common Mistakes That Keep Insulin Elevated

A frequent error is relying solely on low-fat, high-carb "healthy" foods like whole grains and fruit, which still trigger insulin release. Another is inconsistent sleep—less than 7 hours raises cortisol and insulin by 20-30%. Many also overdo artificial sweeteners, which confuse hormonal signaling and maintain cravings. Avoid crash diets that lower metabolism further; instead, follow the gradual 10% body weight loss targets in the CFP Weight Loss Method. Don't ignore the emotional side—embarrassment about obesity often prevents seeking help, but community support accelerates progress. By addressing these pitfalls, most clients see insulin drop 30-50% within 90 days while A1C remains optimal and energy improves dramatically.

💬 What the Community Says

People in their mid-40s to mid-50s frequently share stories of surprise lab results showing normal A1C paired with insulin readings in the teens or higher. Many describe frustration after years of standard diets that never touched their creeping weight or fatigue. A common theme is discovering this pattern during routine diabetes or blood pressure checks, with joint pain often cited as the main barrier to exercise. The community splits on testing frequency—some push for continuous glucose monitors while others rely on quarterly bloodwork due to cost. Lived experiences highlight success with protein-focused eating and shorter eating windows, though a vocal minority warns against extreme fasting that worsened their hormonal symptoms. Most agree insurance rarely covers advanced insulin testing, leading many to seek affordable at-home options and lifestyle tweaks rather than medications. Overall, there's growing recognition that normal A1C isn't always reassuring, sparking discussions about proactive steps before prediabetes fully develops.
Clark, R. (2026). Does anyone have a normal A1C, but high insulin: best practices and common mista. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/does-anyone-have-a-normal-a1c-but-high-insulin-best-practices-and-common-mistakes-to-avoid
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.

Get Personalized Guidance From the Author
Every weight loss journey is different. Book a 1-on-1 telehealth consultation with Russell and get a plan built specifically for you — based on the same evidence-based principles in his book. Available to patients in all 50 states.
Book Your Consultation →
Have a follow-up question?
More Questions 200 answered
▸ When period stopped did you feel like the worst pmdd of all time daily or — what does the research actually say specifically for women over 40? ▸ I have an iodine deficiency. Won't supplementing cause me to have a flare on a low-carb or ketogenic diet? ▸ How I started this year vs. How I'm finishing it - 220lbs -> 135lbs 🩷 — what do certified weight loss coaches recommend on a low-carb or ketogenic diet? 📖 GIP (Gastric Inhibitory Polypeptide) — A hormone that, when combined with GLP-1, enhances the body’s ability to break down fat and manage blood sugar levels mo… ▸ What is a super quick "Mix some of this in" to make coconut oil (purely in liquid form) taste ok to make it easy to consume: how to talk to your doctor about this during the weight loss plateau phase? ▸ Omnipod. Starting an insulin pump help while doing intermittent fasting for those with hypothyroidism or Hashimoto’s? ▸ How to handle calories vs carbs/fat/sugar and how it connects to gut health and inflammation on a low-carb or ketogenic diet? ▸ Is lime water (but sipped throughout the day) ok with autophagy — how a functional medicine approach differs for people with insulin resistance? ▸ What's the dumbest thing you and/or your siblings did when you were left home alone for those with hypothyroidism or Hashimoto's when you have PCOS or hormonal imbalances? 📖 Hidden Hunger — A state where the body is overfed but undernourished, leading to constant cravings because the brain isn't receiving the… ▸ Diabetics with TPN (IV nutrition experience) and the role of cortisol and stress hormones on a low-carb or ketogenic diet? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ To what extent do Mendelian Randomization Studies provide causal evidence for a particular claim — what does the research actually say and its effect on metabolism and insulin levels? ▸ Is the idea of the kitchen timer to eventually get to the point where someone has an orgasm just from hearing the ding? Pavlov's orgasm for people with insulin resistance for people with insulin resistance? ▸ What actually helps with the dryness when you have PCOS or hormonal imbalances while doing intermittent fasting? ▸ Is the carnivore diet the best WOE to lose weight — what does the research actually say if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Lost weight not exactly willingly and everybody’s weird about it for long-term maintenance (not just short-term) specifically for women over 40? 📖 Modern Wheat Dangers — The hidden threat in hybridized grains that causes gut inflammation and spikes blood sugar more aggressively than pure t… ▸ Does the fear of gaining ever go away for those with hypothyroidism or Hashimoto's and its effect on metabolism and insulin levels? ▸ Coke Zero gave me heart palpitations: what to track and how to measure progress and how it connects to gut health and inflammation? ▸ What are the wegovy doses in order on a low-carb or ketogenic diet for long-term maintenance (not just short-term)? ▸ Those of you with Reta experience how does this protocol look for people with insulin resistance when you have PCOS or hormonal imbalances? 📖 Ketogenic Foundation — Using low-carbohydrate principles to keep insulin low, allowing the tirzepatide to work more effectively at lower doses. 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ What is your best way to shift focus when starting and changing your HRT on a low-carb or ketogenic diet — what certified coaches recommend? ▸ When you have hypothyroidism but you don't want to give up trying to live a normal life. 🥲 when you have PCOS or hormonal imbalances: best practices and common mistakes to avoid? ▸ To what extent do Mendelian Randomization Studies provide causal evidence for a particular claim — what does the research actually say for those with hypothyroidism or Hashimoto’s? 📖 Diabetes Reversal — The clinical goal of restoring normal blood sugar levels and insulin function, as seen in patients like John who no long… ▸ Anyone remember the metal lid you had to use a butter knife to pop off: what to track and how to measure progress: best practices and common mistakes to avoid? ▸ When the fatigue is real: how to talk to your doctor about this for people with insulin resistance? ▸ How I Lost 22lbs in 3 Months (155→133lbs at 5'8") after not being able to lose weight for a long time if you're on a GLP-1 like semaglutide or tirzepatide during the weight loss plateau phase? 📖 Refined Carbohydrates — Processed sugars and flours that strip the body of nutrients while driving the hormonal chaos responsible for the modern… ▸ Has anybody heard of or experienced improvement from neurological disorders through fasting and autophagy if you're on a GLP-1 like semaglutide or tirzepatide: best practices and common mistakes to avoid? ▸ Difference between a 3 day and 5 day water fast for autophagy and the role of cortisol and stress hormones on a low-carb or ketogenic diet? ▸ Anyone stopped responding to Mounjaro and had better results with retatrutide for those with hypothyroidism or Hashimoto’s? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ Sterilized soybean sprout — how a functional medicine approach differs: best practices and common mistakes to avoid? 📖 Adipose Tissue Signaling — The way fat cells communicate with the brain; our goal is to fix these signals so the body stops defending an unnaturall… ▸ These electrolyte tabs, how often — evidence-based answer for CFP patients while doing intermittent fasting? ▸ Is it possible that low carb is the only way I can eat specifically for women over 40 and its effect on metabolism and insulin levels? ▸ Exercise — when and what kind while fasting, and does it enhance autophagy — how a functional medicine approach differs and its effect on metabolism and insulin levels? ▸ How do you stop the "I already messed up today" spiral and the role of cortisol and stress hormones — what certified coaches recommend? ▸ Does drinking Sparkling Ice (flavored sparkling water - 5 calories per bottle) during my fasting window break my fast and the role of cortisol and stress hormones during the weight loss plateau phase? 📖 Bio-Individuality — The understanding that every patient’s metabolic journey is unique, requiring a personalized approach to dosing and diet… ▸ Coke Zero gave me heart palpitations: what to track and how to measure progress for those with hypothyroidism or Hashimoto’s? ▸ How many were first diagnosed with OCD if you're on a GLP-1 like semaglutide or tirzepatide for people with insulin resistance? ▸ Do yall ever daydream of who you were before your diagnosis when you have PCOS or hormonal imbalances if you're on a GLP-1 like semaglutide or tirzepatide? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ Got diagnosed today, where do i go from here — what do certified weight loss coaches recommend: best practices and common mistakes to avoid? ▸ Low TSH, Low T4, and Low T3 simultaneously on Levothyroxine — anyone experienced this and the role of cortisol and stress hormones on a low-carb or ketogenic diet? ▸ Beef/Beef organs protein powder: what to track and how to measure progress if you're on a GLP-1 like semaglutide or tirzepatide? 📖 Tirzepatide — A dual-acting medication targeting both GLP-1 and GIP receptors, providing a more comprehensive metabolic signal than si… ▸ Traveling with IBS-D to a 5-day conference in San Diego: how do you manage food — what most people get wrong about this on a low-carb or ketogenic diet? ▸ To what extent do Mendelian Randomization Studies provide causal evidence for a particular claim — what does the research actually say specifically for women over 40? ▸ How long does it take to Is Autophagy? 8 Amazing Benefits Of Fasting That Will Save Your Life: best practices and common mistakes to avoid? 📖 CICO (Calories In, Calories Out) — An outdated model of weight loss that ignores the role of hormones; we challenge this by focusing on food quality and ho… ▸ Omnipod. Starting an insulin pump help while doing intermittent fasting on a low-carb or ketogenic diet? ▸ What do you eat grain/carb wise, and why — how a functional medicine approach differs for those with hypothyroidism or Hashimoto’s? ▸ 42yom Im finding it much harder to lose weight, what are some things I can do now to start losing weight? 📖 Hashimoto’s Success — Achieving weight loss and reduced inflammation in thyroid patients by removing dietary triggers like lectins and modern … 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ Have you cut out snacking in between meals and what are the benefits and its effect on metabolism and insulin levels during the weight loss plateau phase? ▸ When you want something sweet but still try to keep things somewhat low-carb and how it connects to gut health and inflammation if you're on a GLP-1 like semaglutide or tirzepatide? ▸ What foods to stock for overnight guest — evidence-based answer for CFP patients — what certified coaches recommend? 📖 Insulin Resistance — A condition where your cells stop responding to insulin, locking fat in storage; our protocol is designed to unlock thes… ▸ These electrolyte tabs, how often — evidence-based answer for CFP patients specifically for women over 40? ▸ What do you eat grain/carb wise, and why — how a functional medicine approach differs and how it connects to gut health and inflammation?