Oranges, lemons, limes and grapefruit; it doesn't matter which one of these gives your taste buds the greatest tickle, they're all part of the citrus family, which means a plethora of detoxifying qualities. Lemons, a favourite among celebs for their body-cleansing properties, are thought to restore the balance of healthy bacteria in your gut as well as flushing toxins from your system, so try substituting your morning cup of tea or coffee for a simple slice of lemon in hot water. Oranges and grapefruits, meanwhile, are rich in the antioxidants known as flavonoids, which expel damaging free-radicals from your system and protect against cell damage and disease.