If you mean a juice that supposedly “flushes kilos of waste from your body” and causes rapid weight loss, there’s an important distinction:
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Your body does not normally accumulate several kilos of “waste” that a special juice can flush out. Your liver, kidneys, intestines, and lungs handle waste removal.
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Juice cleanses can make the scale drop temporarily, mainly because of less food intake, reduced glycogen and water, and less intestinal contents—not because kilograms of toxins or fat have been eliminated.
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A juice cannot selectively “burn belly fat” or remove stored toxins.
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Very restrictive juice diets can provide too little protein, fiber, essential fats, and other nutrients, and may cause fatigue, dizziness, headaches, diarrhea, or loss of muscle.
If your goal is sustainable weight loss
A better approach is to use whole foods and, if you enjoy juice, treat it as a small part of your diet. For example:
Fiber-rich drink
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1 cup water
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½ cup berries
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½ cucumber
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A handful of spinach
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1 tablespoon chia seeds
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Lemon or lime for flavor
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Blend rather than strain
The fiber is useful for fullness and regular bowel movements, unlike a strained juice.
For weight loss, the biggest factors are your overall calorie intake, adequate protein, fiber-rich foods, physical activity, sleep, and consistency—not a detox drink.
If you tell me your age, sex, height, current weight, target weight, and how quickly you want to lose it, I can explain what a realistic weight-loss plan would look like and whether a particular juice recipe fits into it.