The foods allowed and banned can vary widely, but generally fruit, vegetables, beans, nuts, seeds, herbal teas and massive amounts of water are allowed.

In contrast, wheat, dairy, meat, fish, eggs, caffeine, alcohol, salt, sugar and processed foods - most of the foods that many people love - are banned.

But if our body is already designed to expel waste, what is the point of detoxing? There isn't any point, according to new research, which says the body can recover from the excesses of Christmas on its own.