Expert Q&A

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 on a low-carb or ketogenic diet

Why No Scale Drop in Week 2 on 2.5mg Mounjaro Is Common

As the expert behind the CFP Weight Loss method, I've guided thousands through similar frustrations. At 2.5mg, Mounjaro (tirzepatide) primarily works on blood sugar control and appetite signals rather than rapid fat loss. Many see 1-3 pounds lost in the first 14 days, but water retention, hormonal shifts around age 45-54, and initial metabolic adaptation can mask progress. Your body is adjusting to reduced calories without you even tracking them—trust the process before weighing daily.

Combining Mounjaro with Low-Carb or Ketogenic Diets

Low-carb or ketogenic diets pair exceptionally well with Mounjaro because both enhance insulin sensitivity. Aim for 20-50g net carbs daily on keto to stay in ketosis, which can accelerate fat burning once the medication's full effects kick in around weeks 4-8. Track ketones with urine strips or a blood meter to confirm. Avoid strict calorie cuts below 1,500 daily; Mounjaro already suppresses hunger, so focus on protein (100g+) and healthy fats like avocado and olive oil to preserve muscle and ease joint pain.

Practical Strategies to Overcome Demotivation and Plateaus

Measure non-scale victories: tighter clothes, lower blood pressure readings, or steadier energy despite diabetes management. Walk 20 minutes daily post-meal instead of intense gym sessions that flare joint issues—consistency beats intensity. In my CFP Weight Loss approach, we emphasize simple meal templates: eggs with spinach for breakfast, grilled chicken salad for lunch, and salmon with broccoli for dinner. No complex plans needed. If insurance barriers or past diet failures loom, remember Mounjaro often qualifies under diabetes codes; consult your provider for titration to 5mg after four weeks if tolerated.

Addressing Hormonal Changes and Long-Term Success

Perimenopausal hormonal fluctuations make weight loss harder, but Mounjaro's dual GLP-1/GIP action helps regulate them better than diet alone. Stay hydrated (3 liters daily) to combat constipation and false plateaus. Reassess in week 4—clinical trials show average 15-20% body weight loss over 72 weeks at higher doses. You're not failing; this is early adaptation. Focus on sustainable habits from CFP Weight Loss to maintain results even if medication changes. You've taken the hardest step by starting—keep going with patience and data over emotion.

💬 What the Community Says

Users on forums like Reddit's r/Mounjaro and diabetes support groups report similar experiences in the first two weeks at 2.5mg, with many noting zero scale movement despite strict low-carb or keto eating. The general sentiment is one of initial discouragement that often lifts by week 4-6 as appetite suppression strengthens and doses increase. Most share stories of losing inches or seeing blood sugar improvements before pounds drop, especially those managing joint pain or hormonal issues. A common debate centers on whether keto accelerates results or causes more fatigue early on—opinions split evenly, with some swearing by 30g carbs daily and others preferring moderate low-carb for sustainability. Beginners frequently mention feeling embarrassed about slow starts but find encouragement in non-scale victories like better energy and clothing fit. Overall, the community emphasizes patience, warning against daily weigh-ins, and highlights that past diet failures don't predict Mounjaro outcomes when combined with realistic expectations.
Cite this answer
Clark, R. (2026). I am on my second week of mounjaro (2.5 mg dose ), but there is no drop on the w. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/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-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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