More than half of adults think they are overweight and have been on a diet at least once in their lives, according to a poll.
A total of 59% of Britons feel they weigh too much and 54% have tackled the problem by going on a diet.
The figures are from a YouGov survey of 3,379 adults commissioned by Good Morning Britain who are launching a new health plan.
Being overweight made 49% feel unhappy and of those who dieted 44% said they lost weight but put it back on soon after.
There were 90% of adults who felt stressed at least once a year and 43% who did not manage to get six hours sleep a night.
Back pain was a problem for 24% of the people who said they were overweight, while 23% suffered from joint pain, 19% said they had high blood pressure and 11% had asthma or shortness of breath.
For 41% of Britons, it was more important that their child was a healthy weight even if it meant them being less happy.
When asked how many times in an average week people undertook 30 minutes or more of exercise, there were 28% of adults who did not do any exercise at all and 56% said they had a convenience meal, such as a microwaved or ready to eat meal, at least once a week.
In total 14% of people said they did not drink any water at all.
Smoking was something that 54% said they had never tried while 52% said they had attempted to give up in the past five years.
GMB's Eat More Lose More plan is fronted by Coronation Street's Kym Marsh and also involves nutritionist Tonia Buxton and trainer Scott Ashley.