In a calorie deficit but not losing weight? Check these things first

A flat scale for a few days does not prove that a calorie deficit is not working. Body weight changes from day to day, and short-term water or digestion changes can hide a slower trend. Before cutting out more food, check what period you are comparing and whether your routine is representative.

A calorie deficit is an estimate over time, not a perfect number that can always be confirmed from an app. The aim of this checklist is to find a useful next step, not to blame you for getting the numbers wrong.

1. Are you comparing like with like?

If you weigh yourself, use similar conditions each time, such as the same scale and time of day. Look at a weekly pattern rather than one reading. If weighing is upsetting or encourages restrictive behaviour, use other measures of progress, such as how consistent your meals feel or whether a planned habit is becoming easier.

2. Is the period long enough to see a trend?

A weekend, a few meals or a single week may not tell you much. Look over several weeks while keeping the routine reasonably consistent. Do not respond to every upward reading by removing another food.

3. Are small extras being missed?

If you are comfortable tracking food for a short period, include cooking oils, dressings, spreads, sauces, drinks, alcohol, snacks, tastes while cooking and meals away from home. Check whether app entries use the same state as your food: dry or cooked rice, for example, can have very different weights.

This is information, not a reason to obsess over every bite. If detailed tracking is not a good fit for you, keep a simple routine log and review one part of the day at a time.

4. Has the weekend become a different plan?

Some people follow a routine Monday to Friday and eat or drink differently at weekends. That is common and does not mean you need a perfect seven days. Decide on one change you can keep during the weekend, such as planning a meal before going out or choosing which drinks matter most to you.

5. Could normal fluid changes be masking progress?

Hydration, salty food, digestion and the menstrual cycle can affect scale readings. If the scale rises after a salty meal or a different routine, wait for the pattern to settle rather than trying to "undo" it with restriction.

6. Has your body or routine changed?

As body weight changes, energy needs may also change. A calculator is only an estimate. Activity, sleep, appetite, stress, new medicines and changes in health can all affect the routine you are able to maintain. Do not change prescribed medicines to influence weight.

7. Are you calling it a plateau too soon?

A plateau is a sustained lack of progress, not a couple of mornings at the same number. If the longer trend has been flat and your plan feels manageable, choose one modest adjustment: review an energy-dense drink or snack, slightly adjust one portion, or add comfortable everyday movement. Change one thing at a time so you can tell whether it helps.

What not to do

Do not respond to a frustrating week with a crash diet, fasting beyond what is comfortable, laxatives, dehydration or a very-low-calorie plan you found online. NICE says diets under 800 calories should only be considered within a specialist weight-management service for selected people. If you are consistently hungry, exhausted or preoccupied with food, the plan needs review rather than more restriction.

The NHS recommends speaking to a GP or healthcare professional before changing your diet if you have a medical condition, follow a special diet for your health, or have an eating disorder now or in the past. Also seek advice for unexpected weight change or symptoms that concern you.

A 10-minute reality check

Before changing your plan, write down:

• What period am I comparing: one or two readings, or a longer trend?
• Was this a representative week, including weekends, drinks and meals away from home?
• What is the smallest change I could test without making meals feel punishing?

If the answers point to a short time period or a disrupted week, keep the plan steady and review again later. If they point to a real pattern, test one modest change and record how it affects hunger, energy and consistency as well as weight.