Expert Q&A

Anyone who has a general healthy diet but still felt achey, did you switch things to finally feel good on a low-carb or ketogenic diet

Why a "Healthy" Diet Can Still Leave You Achy

As the founder of CFP Weight Loss and author of The Metabolic Reset, I've worked with thousands in their late 40s and early 50s who eat what they believe is a balanced diet—whole grains, fruits, lean proteins—yet wake up with joint pain, brain fog, and persistent fatigue. The culprit is often blood sugar instability and hidden inflammation. Even moderate carb intake (150-200g daily) can trigger insulin spikes that promote systemic inflammation, especially when hormonal changes like perimenopause or andropause slow metabolism and increase insulin resistance.

Many of my clients managing diabetes and high blood pressure report the same cycle: they follow conventional guidelines but still feel stiff. Their joints hurt too much for exercise, creating a frustrating loop. Insurance rarely covers structured programs, so they feel embarrassed and overwhelmed searching for answers alone.

The Shift to Low-Carb or Ketogenic Eating

Switching to a low-carb diet (under 100g net carbs daily) or full ketogenic diet (under 50g, emphasizing healthy fats) often delivers rapid relief. Within 2-4 weeks, patients notice reduced joint aches because ketosis lowers inflammatory markers like CRP by up to 30-40% according to multiple studies I reference in my book. Stable blood sugar eliminates energy crashes, while increased fat intake supports hormone production.

In my Metabolic Reset Protocol, we start beginners with a 7-day transition: replace breakfast grains with eggs cooked in avocado oil, swap pasta for zucchini noodles with olive oil and salmon. Track ketones using inexpensive urine strips initially—no fancy gym schedule needed. Most see joint pain drop enough to add gentle 15-minute walks, building momentum without overwhelm.

Practical Tips Tailored for Your Life

Focus on anti-inflammatory fats: 2-3 tablespoons of olive or coconut oil daily, fatty fish twice weekly, and nuts in moderation. Prioritize 100g protein from pasture-raised sources to preserve muscle during fat loss. For hormonal balance, include magnesium-rich foods like spinach and pumpkin seeds—many women report fewer hot flashes and better sleep. Time your carbs around activity if needed, keeping total intake low.

Expect initial "keto flu"—headaches or fatigue for 3-7 days—but combat it with electrolytes: 4000mg sodium, 1000mg potassium from broth or supplements. My clients with diabetes often reduce medications under doctor supervision as A1C drops 1-2 points in 90 days. This isn't another failed diet; it's a sustainable metabolic shift that fits middle-income budgets using affordable staples.

Real Results and Next Steps

One client, a 52-year-old teacher with 30 years of yo-yo dieting, dropped 18 pounds in eight weeks on my protocol while her knee pain decreased enough to enjoy hiking again. Blood pressure normalized without extra meds. If you've felt defeated before, know this approach targets root causes—insulin resistance and inflammation—without complex meal plans. Start simple today: cut one high-carb item and add fat. Your body will thank you with less ache and more energy.

💬 What the Community Says

The community shows strong interest in this topic, with many in the 45-55 age group sharing stories of lingering aches despite "clean" eating. Most practitioners find that transitioning to low-carb or keto reduces joint pain and brain fog within weeks, especially those dealing with prediabetes or menopause symptoms. A vocal minority reports initial keto flu or difficulty sustaining it long-term due to family meal conflicts. Lived experiences highlight success with simpler approaches like adding more fats and cutting bread, though some debate the necessity of full ketosis versus moderate low-carb. Beginners often express relief finding others who understand insurance limitations and time constraints, with frequent mentions of improved energy and less inflammation driving continued discussion.
Cite this answer
Clark, R. (2026). Anyone who has a general healthy diet but still felt achey, did you switch thing. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/anyone-who-has-a-general-healthy-diet-but-still-felt-achey-did-you-switch-things-to-finally-feel-good-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.

📖 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
▸ 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? ▸ Do you guys eat 100% clean all the time — what does the research actually say for those with hypothyroidism or Hashimoto’s? ▸ Fitter or kidding myself: how to talk to your doctor about this if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Has anyone ever tried low-grain instead of grain free — evidence-based answer for CFP patients 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… ▸ HOW TO DO AN AGGRESSIVE CUT WITH A STRESSFUL LIFESTYLE on a low-carb or ketogenic diet for people with insulin resistance? ▸ Why cant i lose weight and am gaining weight 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 specifically for women over 40? ▸ Weight loss without GLP-1 — what does the research actually say while doing intermittent fasting? ▸ 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? 📖 Caloric Deficit Myth — The false belief that weight loss is purely 'math'; we focus on hormonal signaling rather than just counting calories to… ▸ What do you eat grain/carb wise, and why — how a functional medicine approach differs 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 ▸ Tips for maintenance: what’s yours for long-term maintenance (not just short-term): best practices and common mistakes to avoid? ▸ Crust check 🔥 ribeye done right — what the research actually says? 📖 Phase 2: Aggressive Loss — A 40-day window of focused fat loss supported by low-dose medication and a specific lectin-free, low-carb nutritional fr… ▸ How to handle calories vs carbs/fat/sugar and how it connects to gut health and inflammation on a low-carb or ketogenic diet? ▸ 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 — what certified coaches recommend? ▸ Is it normal to lose weight then gain again when you have PCOS or hormonal imbalances for long-term maintenance (not just short-term)? ▸ If a random dance partner app existed .. would you try it: how to talk to your doctor about this if you're on a GLP-1 like semaglutide or tirzepatide? ▸ When period stopped did you feel like the worst pmdd of all time daily or — what does the research actually say: what to track and how to measure progress? ▸ 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? 📖 Autophagy — The body's natural 'housecleaning' process that occurs during fasting or low-insulin states, promoted during our mainten… ▸ Exercise — when and what kind while fasting, and does it enhance autophagy — how a functional medicine approach differs specifically for women over 40? ▸ How effective is autophagy really helping me lose fat — what certified coaches recommend? 📗 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 ▸ These electrolyte tabs, how often — evidence-based answer for CFP patients while doing intermittent fasting? ▸ How much protein should I eat if I weigh 280 pounds and want to cut a 100 pounds of fat off of my body? ▸ My weight loss progress so far as a 23 year male who stared eating less unhealthy and does little to moderate exercise. Am I doing well — evidence-based answer for CFP patients for people with insulin resistance? ▸ I have an iodine deficiency. Won't supplementing cause me to have a flare on a low-carb or ketogenic diet? ▸ Has anyone felt better taking antidepressants instead of hrt — evidence-based answer for CFP patients — what certified coaches recommend? 📖 One Box Protocol — A revolutionary approach where we stretch one 60 mg box of tirzepatide across three metabolic phases, prioritizing long-… ▸ Low TSH, Low T4, and Low T3 simultaneously on Levothyroxine — anyone experienced this and the role of cortisol and stress hormones — what certified coaches recommend? ▸ If a random dance partner app existed .. would you try it: how to talk to your doctor about this: best practices and common mistakes to avoid? ▸ 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? 📗 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 ▸ I am on my second week of mounjaro (2.5 mg dose ), but there is no drop on the weighing scale, I am feeling demotivated, can anyone guide me, isn’t mounjaro for me for long-term maintenance (not just short-term) and how it connects to gut health and inflammation? ▸ Got diagnosed today, where do i go from here — what do certified weight loss coaches recommend: 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? 📖 The Clark Protocol — Our evidence-based framework that combines clinical nurse practitioner expertise with personal experience to solve the o… ▸ What are the wegovy doses in order on a low-carb or ketogenic diet when you have PCOS or hormonal imbalances? ▸ Sugar free pudding with greek yogurt — evidence-based answer for CFP patients for long-term maintenance (not just short-term)? ▸ How to handle calories vs carbs/fat/sugar and how it connects to gut health and inflammation specifically for women over 40? ▸ If a random dance partner app existed .. would you try it: how to talk to your doctor about this and its effect on metabolism and insulin levels? ▸ Why cant i lose weight and am gaining weight when you have PCOS or hormonal imbalances for those with hypothyroidism or Hashimoto’s? ▸ What happens when Has anyone here experienced skin benefits from autophagy 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 ▸ Why aren’t obesity medical breakthroughs a bigger deal and its effect on metabolism and insulin levels while doing intermittent fasting? 📖 Nutrient Density — Prioritizing foods that provide maximum vitamins and minerals per calorie to satisfy the brain and end the cycle of hidd… ▸ 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? ▸ Omnipod. Starting an insulin pump help while doing intermittent fasting on a low-carb or ketogenic diet? ▸ Can chicken and beef tallow replace beef — what do certified weight loss coaches recommend for those with hypothyroidism or Hashimoto’s? ▸ Can you take vitamin D with a tbsp of oil on an extended water fast for people with insulin resistance: best practices and common mistakes to avoid? ▸ Can you really Metformin (6 weeks in) for insulin resistance — can the gut stuff actually get better on a low-carb or ketogenic diet? 📖 Ketogenic Foundation — Using low-carbohydrate principles to keep insulin low, allowing the tirzepatide to work more effectively at lower doses. ▸ What to do if you have to eat late dinners?? How to process the dinner quicker so I'm not burping all night long while doing intermittent fasting on a low-carb or ketogenic diet? ▸ What are the wegovy doses in order on a low-carb or ketogenic diet — what certified coaches recommend? ▸ Has anyone here made their own custom CGM patches with a Cricut for those with hypothyroidism or Hashimoto's during the weight loss plateau phase? 📗 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 ▸ Anyone remember the metal lid you had to use a butter knife to pop off: what to track and how to measure progress while doing intermittent fasting? ▸ Difference between a 3 day and 5 day water fast for autophagy and the role of cortisol and stress hormones for people with insulin resistance? ▸ Im eating so well that I accidently put my body in ketosis and how it connects to gut health and inflammation: best practices and common mistakes to avoid? ▸ What can I ask for if estrodiol cream remains in shortage? Newly prescribed-should I even start if I can't refill next month — how a functional medicine approach differs — what the research actually says?