Meal replacement shakes were popular during the 80s and 90s with SlimFast leading the way.
New diet schemes using shakes and soups are back this summer as more women take up new Lighter Life and Exante Diet schemes.
These schemes are taking over from recent fad diets such as Atkins, GI, south Beach to mention a few.
Costing £66 a week, the Lighter Life regime works by consuming 500 calories of food a day plus soups and shakes. Dieters also attend group sessions.
The Exante Diet allows the consumption of 600 calories a day plus a mix of healthy balance meals.
Over the years meal replacement diets have been heavily criticised by nutritionists and dieticians. Some claim that very low calorie diets can lead to health problems linked with heart conditions and anorexia.
Lighter Life however, insists the plan is safe if followed properly and clients are only accepted on approval from a GP.
So far 150,000 people have completed the diet among them Jackie Llewellyn-Bowen, wife of designer Laurence, who lost five stones after being on the diet.