Women typically go on two healthy eating attempts every year, with each one lasting for around five weeks, new research suggests.
A poll by weight loss supplement manufacturer Lipobind found that the average women goes on a massive 104 diets between the ages of 18 and 70, but many do not actually manage to lose weight.
A third of the 4,000 respondents also admitted that their first diet had been at the age of 16 or under, while 39 per cent blamed their regular attempts to lose weight on embarrassment about the way they look.
A spokesman for Lipobind told the Daily Telegraph: "There is no miracle pill or quick fix to weight loss.
"However, millions of people find taking a dietary weight management supplement gives them the extra boost they need to kick-start and sustain a new healthy lifestyle programme."
Dr Glenn Wilson, from King's College, London, said that the survey highlights the pressures to keep in shape.
He added: "Women's weight is bound to fluctuate due to life-changing events such as having a baby, emotional factors associated with relationships, and changes in their working environment."