For Ozempic, Wegovy, Mounjaro, Saxenda users
Preserve your muscle while you lose fat.
Your GLP-1 makes you lose weight fast. Without targeted nutrition, 25 to 39 % of that loss is lean mass, not fat. Cetona builds your personalized meal plan in 60 seconds: high protein, optimized fiber, small meals that go down even when you feel nauseous.
7-day free trial · Cancel anytime from Settings
Backed by science
STEP-1 and SURMOUNT-1 trials
GDPR compliant
Encrypted, never sold
No commitment
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The real problem no one tells you about
Ozempic, Wegovy and Mounjaro suppress your appetite. You lose weight fast. But without nutritional guidance, your body draws on your lean mass, not just your fat. That lost lean mass slows your metabolism and sets you up for weight regain when you stop the medication.
25 to 39 %
of GLP-1 weight loss = lean mass (without a proper nutrition protocol)
What the science says
Our nutrition protocols are based on published clinical trials from Novo Nordisk and Eli Lilly, plus the exercise physiology literature. Public, verifiable sources.
STEP-1 trial (NEJM 2021, Wilding et al.)
Of 15.3 kg lost on average under semaglutide for 68 weeks, about 6.9 kg came from lean mass (39 %).
SURMOUNT-1 body-composition substudy (Look et al., Diabetes Obes Metab 2025)
About 75 % of the weight lost came from fat mass and 25 % from lean mass. That proportion held across age, sex and size of weight loss, and it is the same without the drug: losing weight costs lean mass either way.
Phillips & Van Loon (J Sports Sci 2011), in athletes
Under energy restriction these authors put useful protein intake at 1.8 to 2.0 g per kg of body weight depending on the size of the deficit, against 1.3 to 1.8 g/kg without restriction, across 3 to 4 meals. Their figures are for athletes and per kg of body weight, not lean mass.
Wharton et al. (Obesity 2023)
40 to 60 % of GLP-1 users report constipation. A 25 g/day fiber target and 2.5 L of water significantly reduce this effect.
How Cetona protects your muscles
Protein-first design
At least 1.2 g of protein per kg of your body weight, spread across every small meal, and more if your estimated lean mass calls for it. Dense, easy-to-digest sources: eggs, cottage cheese, Greek yogurt, salmon, chicken.
Fiber and hydration
Minimum 25 g of fiber daily to prevent constipation (the #1 GLP-1 side effect, reported by 40 to 60 % of users). Hydration reminders built in: 2.5 L per day.
Small meals that work
4 to 6 mini-meals instead of 3 large ones. Quick recipes (5 to 15 minutes), portions matched to your reduced appetite. Light breakfasts that won't trigger morning nausea.
Three steps, 60 seconds
- 1
Take the quiz
Current medication, weight, allergies, country. Everything is confidential and used only to personalize your plan.
- 2
Your plan is built
7 days of meals adapted to your medication, with macros calculated to the gram and a country-specific grocery list.
- 3
Eat, adjust, thrive
Follow your plan, swap any recipe with one click, and get weekly tips to preserve your lean mass.
Cetona is for you if...
You take a GLP-1 medication prescribed by your doctor and want to maximize your results without losing muscle.
- ✓
You've started Ozempic, Wegovy, Mounjaro, Saxenda or Zepbound
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You struggle to hit your protein target because appetite is suppressed
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You want to preserve muscle so you don't regain when you stop the drug
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You're looking for recipes that don't trigger morning nausea
Frequently asked questions
Does Cetona replace my nutritionist or doctor?+
No. Cetona is a meal-planning tool, not a medical service. Keep working with your doctor and nutritionist for treatment adjustments. Cetona helps you operationalize their nutritional guidance day to day.
What if I have morning nausea?+
Your breakfasts are automatically adapted: no heavy fats, easy to digest (scrambled eggs with milk, Greek yogurt with berries, protein smoothie, cottage cheese). You can also push your first meal later with a single toggle.
How much protein per day?+
Cetona calculates your personal target from your weight and height: at least 1.2 g per kg of your body weight, and 1.6 g per kg of estimated lean mass when that comes out higher. Most often it lands between 85 and 145 g per day, spread across 4 to 6 small meals.
What if I stop my GLP-1?+
Cetona keeps working. You can switch to keto, classic low-carb, or maintenance mode via the quiz. The goal: keep your muscle gains after stopping the medication.
Is my data confidential?+
Yes. Your medical data (medication, weight, allergies) is encrypted and never sold. You can delete your account and all data in one click from settings.
How much does it cost and can I cancel?+
7-day free trial. Then $9.99/month or $49/year. Cancel anytime from Settings, no email or call needed. 7-day money-back guarantee.
Protect your muscle. Maximize your GLP-1.
Your personalized plan is generated in 60 seconds. 7-day free trial, no commitment.
Start my free planNot a substitute for medical care. Discuss your nutrition plan with your doctor before adopting it.
⚕️Cetona is a meal-planning tool. It does not replace professional medical advice. Consult your doctor before any major dietary change, especially if you take a GLP-1 medication.