Of these, 63% said their diet contained too much fat, 52% claimed to be neglecting important food groups, while 41% conceded their diet contained too much sugar, according to the survey carried out by GoNutrition.com.
The most commonly under-eaten groups were dairy (37%), protein (21%) and fibre (17%).
Meanwhile, 24% revealed that they avoided a specific food group for dietary reasons, while 76% admitted that they struggled to afford or find items they enjoyed from a particular food group.
Entire food group
Furthermore, 74% of participants said they had cut out an entire food group from their diet for a specific reason. The majority of these (62%) were females aged 18–30.