Can Apple Cider Vinegar and Lemon Juice Help With Weight Loss?
Mixing apple cider vinegar with lemon juice is often presented as a simple way to lose weight. In practice, changes in body weight depend far more on your overall eating pattern than on one acidic drink.
What the mixture can and cannot do
Apple cider vinegar and lemon juice add a sharp flavour to water, but the mixture does not directly burn body fat. Drinking it alongside your usual food will not create weight loss unless your overall energy intake and activity support that change.

It may replace a drink that contributes more energy, which could alter your daily total. That effect comes from the swap rather than a special property of vinegar or lemon juice, and the difference depends on what you would otherwise have consumed.
Track the full routine, not one ingredient
If you already log what you eat, record the vinegar, lemon juice and anything else added to the mixture. More importantly, look at the wider pattern of meals, snacks, drinks and portions across several days rather than judging progress by one entry.

Notice whether the drink changes what you choose later. It might fit comfortably into your routine, or its strong taste might leave you reaching for something else; your food log can help you spot either pattern.
Why the scales may not tell the whole story
Body weight naturally moves up and down because of fluid, digestion and the amount of food still passing through your body. A short-term change after starting this drink does not show that the mixture has reduced body fat.

Use weigh-ins under similar conditions and pay attention to the longer trend. The useful question is whether your tracked routine is consistent and sustainable, not whether a single drink caused the latest reading.
Use it carefully if you enjoy it
Both vinegar and lemon juice are acidic, so a concentrated mixture can irritate the mouth or throat and may damage tooth surfaces over time. Dilute it well, avoid sipping it slowly for long periods, and stop if it feels uncomfortable.

You do not need to include this mixture in a weight-loss plan. If you like the flavour, treat it as an optional drink and keep your focus on filling meals, suitable portions and an overall intake that matches your goal.