A weight-loss plateau occurs when your weight stops falling even though you continue following your eating and physical activity plan. It is frustrating but common. It does not automatically mean that treatment is ineffective or that your “metabolism is broken”.
Why does a plateau happen?
As you lose weight, your body becomes smaller and needs fewer calories to maintain itself. Your spontaneous movement during the day may also decrease: you may sit more, walk less and move less without noticing. These changes can reduce your calorie deficit.
Other factors that can hinder progress include insufficient sleep, stress, constipation, water retention, the menstrual cycle, alcohol, inaccurate portion estimates and too little protein.
When is it really a plateau?
Do not call every week without weight loss a plateau. Weight naturally fluctuates with water, salt, glycogen, bowel movements and inflammation after exercise. If your average weight remains stable for around 3–4 weeks despite following the plan consistently, it may be time to review it. This is a practical guide, not a universal diagnostic threshold.
What should you check first?
- Protein: are you getting enough protein at each meal?
- Fibre: do you eat vegetables, pulses, whole fruits and wholegrain foods?
- Liquid calories: alcohol, sweetened drinks, coffee with milk and sugar?
- Everyday movement: steps, walking after meals and activity outside planned workouts?
- Sleep: are you sleeping enough and keeping a regular schedule?
If you have diabetes, prediabetes or metabolic syndrome, make these adjustments without increasing the risk of hypoglycaemia or other imbalances, with medical advice where needed.
A plateau during treatment with Wegovy or Mounjaro
A plateau can also occur during newer weight-management treatments. Do not increase the dose or combine medicines based on advice found online. The doctor needs to assess tolerability, food and protein intake, muscle mass, constipation, test results and realistic goals.
Read more about Wegovy monitoring or tirzepatide for weight loss.
When should medical causes be investigated?
Medical assessment is useful if the plateau persists or you develop severe fatigue, hair loss, cold intolerance, swelling, menstrual irregularities, severe constipation, episodes of binge eating or unstable blood glucose. Depending on the symptoms and history, the doctor may consider TSH, a full blood count, ferritin, vitamin D, blood glucose, HbA1c, blood lipids, and liver and kidney function tests. These are not a mandatory test panel for everyone.
What helps in practice?
A moderate adjustment is often appropriate: reviewing portions, increasing daily steps, including 2–3 strength-training sessions per week if suitable for your health, eating meals with protein and vegetables, reducing automatic snacking and agreeing a monitoring strategy. For an individual approach, request an online nutrition consultation or explore the information on weight management.
