For one simple version, blend kiwi with a handful of spinach, plain yogurt and water or milk to your preferred consistency. Add a piece of banana if you want a softer, sweeter flavour.

The goal is not to 'detox' the body — your liver and kidneys already perform essential metabolic and waste-processing functions. Think of the smoothie simply as another way to use whole foods.

WHO encourages a diverse intake of fruits and vegetables. Keeping the recipe based on whole fruit rather than juice also helps avoid making free sugars the main feature.

People with medical dietary restrictions should adapt ingredients accordingly.