Expert Q&A

Going for my first 36 hours. Any tips: how to talk to your doctor about this

Why Discuss Your First 36-Hour Fast With Your Doctor

I always recommend that complete beginners—especially those aged 45-54 managing diabetes, blood pressure, or hormonal changes—get medical clearance before their first 36-hour fast. Insurance rarely covers structured programs, so having your physician as an ally protects you and provides baseline data that tracks your progress. Many of my clients who failed every diet before finally succeed when they combine physician-guided fasting with my simple refeed strategy.

Script to Use When Talking to Your Doctor

Bring a one-page summary: state you plan a water-and-electrolyte 36-hour fast once weekly, following my Metabolic Reset approach. Say, “I’m managing mid-life hormonal shifts and joint pain that makes intense exercise impossible. I want to improve insulin sensitivity without complicated meal plans. Can we check my A1C, fasting glucose, electrolytes, and kidney function first?”

Ask for specific monitoring: blood pressure log, ketone strips if you have diabetes, and follow-up labs in 4 weeks. Emphasize this is not starvation but a timed metabolic reset that research shows can lower inflammatory markers by 20-30% in the first month for people in your age group.

Practical Tips to Make Your First 36-Hour Fast Successful

Start after dinner on day one and end with a small protein-rich meal 36 hours later. Use 2-3 grams of sodium daily via broth or electrolyte packets to prevent headaches and fatigue. For joint pain, gentle walking or seated yoga replaces gym sessions—my protocol proves you don’t need punishing workouts.

Track symptoms in a simple notebook: energy at hour 24, hunger scale, and blood glucose if diabetic. Break the fast gently with bone broth then a 400-calorie meal of eggs, avocado, and greens to avoid refeeding issues. Hydrate with 3 liters of water. Most beginners in our community drop 2-4 pounds of water weight in the first fast and report calmer cravings within two cycles.

Addressing Common Fears: Hormones, Diabetes, and Past Failures

Hormonal fluctuations in perimenopause make fat loss harder, but strategic extended fasting improves insulin sensitivity and supports natural hormone balance without extra cost. If you take blood pressure or diabetes meds, your doctor may adjust doses proactively. My book details exactly how to time medications around fasting windows. Remember, this is not another restrictive diet—it’s a sustainable tool that fits busy middle-income schedules and rebuilds trust in your body’s ability to heal.

💬 What the Community Says

In online forums and support groups, people in their late 40s and early 50s preparing for a first 36-hour fast often share doctor visit stories. Most report positive experiences when they bring printed bloodwork requests and emphasize “metabolic health” rather than “weight loss.” A common theme is physicians being supportive if patients have prediabetes or high blood pressure, yet some doctors remain cautious about extended fasting in those on medications. Beginners frequently mention joint pain making movement scary, but many note that once cleared, the fast itself eases inflammation surprisingly fast. Debates arise around electrolyte use and fear of “starvation mode,” with a vocal minority insisting on starting with 16:8 instead. Overall sentiment shows cautious optimism—users feel empowered printing scripts from expert sites but still embarrassed to ask for help. Lived experiences highlight that those who get baseline labs feel far more confident and report fewer side effects in subsequent fasts.
Cite this answer
Clark, R. (2026). Going for my first 36 hours. Any tips: how to talk to your doctor about this. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/going-for-my-first-36-hours-any-tips-how-to-talk-to-your-doctor-about-this
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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