Expert Q&A

Does anyone have a normal A1C, but high insulin and its effect on metabolism and insulin levels

Understanding Normal A1C With Elevated Insulin

Many people in their late 40s and early 50s are surprised to learn they can have a normal A1C yet show high fasting insulin levels. A1C measures average blood glucose over 2-3 months, often staying below 5.7% even as your pancreas pumps out extra insulin to keep glucose in check. This early stage of insulin resistance is common during hormonal shifts in perimenopause and menopause, when estrogen decline makes cells less responsive to insulin.

In my years guiding patients through the CFP Weight Loss Method, I’ve seen this pattern repeatedly in those managing diabetes risk, high blood pressure, and stubborn weight. High insulin tells your body to store fat, especially around the middle, and slows metabolic rate by 5-10% in many cases. This explains why previous diets failed despite “normal” lab results.

How High Insulin Impacts Metabolism and Weight

Elevated insulin blocks lipolysis, the process of burning stored fat for energy. Even with normal glucose, high insulin keeps metabolism in storage mode, making joint-pain-friendly movement feel pointless and weight loss impossible. Studies show individuals with high insulin but normal A1C gain an average of 1.5 pounds per year more than those with balanced levels.

Hormonal changes amplify this: declining estrogen increases insulin resistance by up to 25%. The CFP Weight Loss Method addresses this directly with simple meal timing and anti-inflammatory food choices that lower insulin without complex tracking or expensive programs insurance won’t cover.

Practical Steps to Lower Insulin and Restore Metabolic Health

Start with a 12-hour overnight fast—finish dinner by 7 p.m. and eat breakfast at 7 a.m. This simple change can drop fasting insulin 15-20% in 4 weeks. Focus on protein-first meals (25-30g per meal) with non-starchy vegetables and healthy fats. Walking after meals for just 10 minutes improves insulin sensitivity by 30% without stressing painful joints.

Track both fasting insulin and A1C with your doctor. Aim for fasting insulin under 10 μU/mL. The CFP approach avoids restrictive plans that lead to burnout, instead using sustainable habits that fit busy middle-income schedules and reduce embarrassment around seeking obesity support.

Long-Term Benefits and Monitoring

Lowering insulin not only speeds fat loss but improves blood pressure and energy. Many following my method report 8-15 pounds lost in 8 weeks while stabilizing blood sugar. Re-test every 3-6 months. Small, consistent changes beat perfection—especially when past diets left you distrustful of new approaches.

💬 What the Community Says

The community shows strong interest in the disconnect between normal A1C readings and high insulin results, especially among women 45-55 dealing with perimenopause and midlife weight gain. Most practitioners report frustration after years of "normal" labs while struggling to lose weight and experiencing joint pain that limits exercise. A common theme is discovering elevated insulin only after requesting specific tests beyond standard panels. Many share success stories using intermittent fasting windows and higher-protein meals, noting improved energy and gradual weight loss. However, a vocal minority debates whether high insulin without prediabetes truly matters, with some doctors dismissing concerns. Insurance barriers and conflicting nutrition advice leave many feeling overwhelmed, though shared experiences with the CFP-style sustainable changes often receive positive feedback. Beginners frequently ask how to approach doctors about testing and express relief finding others in the same situation.
Cite this answer
Clark, R. (2026). Does anyone have a normal A1C, but high insulin and its effect on metabolism and. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/does-anyone-have-a-normal-a1c-but-high-insulin-and-its-effect-on-metabolism-and-insulin-levels
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.

📖 The 30-Week Tirzepatide Reset — Get the Book →
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
▸ Pic in the white tank top is when I first started 23 days ago, I weighed 280 lbs, compared to today, 269 lbs. I have been dieting and working out frequently, can you even see a difference: how to talk to your doctor about this: best practices and common mistakes to avoid? ▸ Exercise — when and what kind while fasting, and does it enhance autophagy — how a functional medicine approach differs during the weight loss plateau phase? ▸ What is a ‘normal’ value for dawn phenomena for you for people with insulin resistance if you're on a GLP-1 like semaglutide or tirzepatide? 📖 Leptin Sensitivity — Restoring your brain's ability to hear the 'I am full' signal, which is often muted by high-sugar diets and systemic inf… ▸ 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 for those with hypothyroidism or Hashimoto’s? ▸ What causes I reduced my IR from 15.5 to 4 in 3 months if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Is lime water (but sipped throughout the day) ok with autophagy — how a functional medicine approach differs and how it connects to gut health and inflammation? ▸ Those of you with Reta experience how does this protocol look for people with insulin resistance on a low-carb or ketogenic diet? 📖 Hashimoto’s Success — Achieving weight loss and reduced inflammation in thyroid patients by removing dietary triggers like lectins and modern … ▸ 1 year update...any difference — what most people get wrong about this — what the research actually says? ▸ What if you are/were someone who eats even when full/not hungry on a low-carb or ketogenic diet for people with insulin resistance? 📗 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 ▸ How do you handle social settings and conversations with other people — what does the research actually say if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Compression socks. Worth it? Any recs — how a functional medicine approach differs and how it connects to gut health and inflammation? ▸ How to incorporate psyllium husk with intermittent fasting — what do certified weight loss coaches recommend if you're on a GLP-1 like semaglutide or tirzepatide? ▸ How to incorporate psyllium husk with intermittent fasting — what do certified weight loss coaches recommend during the weight loss plateau phase? ▸ How long does it take to Is Autophagy? 8 Amazing Benefits Of Fasting That Will Save Your Life while doing intermittent fasting? 📖 Metabolic Flexibility — The body’s ability to efficiently switch between burning carbohydrates and burning stored body fat based on availability… ▸ Probiotics worked for a month then stopped. Anyone else for those with hypothyroidism or Hashimoto's if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Are people who get no effect just using bad product: best practices and common mistakes to avoid: best practices and common mistakes to avoid? ▸ What lifestyle changes are your golden rule for reversing IR during the weight loss plateau phase for people with insulin resistance? ▸ How to calm my nerves down at doctors — what do certified weight loss coaches recommend for long-term maintenance (not just short-term)? 📖 Diabetes Reversal — The clinical goal of restoring normal blood sugar levels and insulin function, as seen in patients like John who no long… 📗 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 routine worked for you: what to track and how to measure progress on a low-carb or ketogenic diet? ▸ How long was your withdrawal when you went sugarfree for those with hypothyroidism or Hashimoto's for those with hypothyroidism or Hashimoto’s? ▸ What is your immediate go to for some relief during ha — what most people get wrong about this if you're on a GLP-1 like semaglutide or tirzepatide? 📖 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… ▸ Accidentally left my vials out overnight. Are they still good if you're on a GLP-1 like semaglutide or tirzepatide for people with insulin resistance? ▸ Why is my psychiatrist recommending supplements — how a functional medicine approach differs and its effect on metabolism and insulin levels? ▸ Finally connected the dots between my thyroid, gut issues, and brain fog - why don't doctors look at the whole picture specifically for women over 40 for people with insulin resistance? 📖 Caloric Deficit Myth — The false belief that weight loss is purely 'math'; we focus on hormonal signaling rather than just counting calories to… ▸ Do you think they read the responses they receive: how to talk to your doctor about this — what the research actually says? ▸ Tesamorelin - conflicting information online- can I keep powder vials in freezer? Can I keep reconstituted vials in fridge — what do certified weight loss coaches recommend for long-term maintenance (not just short-term)? ▸ When period stopped did you feel like the worst pmdd of all time daily or — what does the research actually say: best practices and common mistakes to avoid? 📗 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 ▸ Can i mix peps in the same syringe for those with hypothyroidism or Hashimoto's for those with hypothyroidism or Hashimoto’s? ▸ Metformin (6 weeks in) for insulin resistance — can the gut stuff actually get better during the weight loss plateau phase? ▸ Can you tell a difference in my face — how a functional medicine approach differs specifically for women over 40? ▸ Difference between a 3 day and 5 day water fast for autophagy and the role of cortisol and stress hormones while doing intermittent fasting? 📖 Maintenance Phase — The final 28 days of our 70-day cycle where we stabilize the new weight and solidify the metabolic habits that prevent f… ▸ How to work on betrayal, forgiveness integration: what to track and how to measure progress for long-term maintenance (not just short-term)? ▸ Is anyone else worried about judgment from others for those with hypothyroidism or Hashimoto's while doing intermittent fasting? ▸ Is Emma Relief good for gut issues and the role of cortisol and stress hormones for long-term maintenance (not just short-term)? 📖 Gut-Brain Axis — The complex communication network between your digestive system and your brain that controls satiety, mood, and metaboli… ▸ What foods to stock for overnight guest — evidence-based answer for CFP patients for people with insulin resistance? ▸ Does the weight loss journey has to be so miserable: how to talk to your doctor about this and how it connects to gut health and inflammation? 📗 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 ▸ Does anyone else’s health anxiety get MUCH worse at night for those with hypothyroidism or Hashimoto's on a low-carb or ketogenic diet? ▸ Will I ever be able to wear low rise jeans without being insecure: best practices and common mistakes to avoid when you have PCOS or hormonal imbalances? ▸ What a month of paleo has done for me: best practices and common mistakes to avoid while doing intermittent fasting? 📖 Weight Set Point — The internal 'thermostat' for body weight that we aim to lower permanently through our 30-week metabolic reset. ▸ Is this a good indicator of autophagy and how it connects to gut health and inflammation for those with hypothyroidism or Hashimoto’s? ▸ Is compounded semaglutide with B12 worth choosing over B6 or plain: best practices and common mistakes to avoid when you have PCOS or hormonal imbalances? ▸ Has anyone felt better taking antidepressants instead of hrt — evidence-based answer for CFP patients: what to track and how to measure progress? ▸ Finally connected the dots between my thyroid, gut issues, and brain fog - why don't doctors look at the whole picture specifically for women over 40 and its effect on metabolism and insulin levels? ▸ How does was a slow start but this is where I’m at. 286👉🏻158 Over about 18 months. on a low-carb diet specifically for women over 40? ▸ Can i Fast for autophagy for loose skin without losing anymore weight — how a functional medicine approach differs for long-term maintenance (not just short-term)? 📖 Bio-Individuality — The understanding that every patient’s metabolic journey is unique, requiring a personalized approach to dosing and diet… ▸ What's the dumbest thing you and/or your siblings did when you were left home alone for those with hypothyroidism or Hashimoto's and its effect on metabolism and insulin levels? 📗 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 to track and how to measure progress? ▸ For those of you that drink - what's your go to: best practices and common mistakes to avoid if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Forgot to swab the vial with alcohol pad if you're on a GLP-1 like semaglutide or tirzepatide: best practices and common mistakes to avoid? 📖 Metabolic Reset — The process of retraining your body to utilize stored fat for fuel and regulating hunger hormones so you can maintain yo… ▸ How can I gain 10kg on Paleo when you have PCOS or hormonal imbalances?