Fewer headaches, for example, are probably the result of being fully hydrated due to drinking so much water and better skin may be due to eating more antioxidant-packed fruit and veg.
Are there any pros?
As these toxins build up in our system, they say, any number of health problems can occur, including weight gain, cellulite, headaches, dull skin, bloating, fatigue, lowered immunity, aches and pains, and a general lack of wellbeing.
What does a detox diet involve?
The foods allowed and banned can vary widely amongst different detox diets, but generally fruit, vegetables, beans, nuts, seeds, herbal teas and massive amounts of water are allowed.
The amount of weight you can expect to lose will vary according to the severity of the dietary restriction - the more foods that are banned, the more weight you are likely to lose.
The process of detoxing is supposed to help to remove these toxins from the body with the result that you lose weight, feel healthier and recover from all those other niggling health problems.
With gorgeous celebrities like Salma Hayek, Megan Fox and Beyonce extolling the virtues of a detox diet, you may be tempted to give it a go. But just how healthy are they? Dietitian Juliette Kellow investigates.