Eating more fruit and vegetables can give your skin a noticeable 'golden glow' within weeks, according to a study.
Researchers looked at the impact of the orangey-red carotenoid pigments found in fruit and vegetables on skin tone.
The results showed that two extra portions of fruit and vegetables every day created a change in skin colour within six weeks.
Scientists from the University of St Andrews in the UK who carried out the research said it supported health recommendations of eating five portions of fruit and vegetables every day.
The researchers hope their findings will appeal to people's vanity and offer a better incentive for taking up a healthier diet.
Researcher Ross Whitehead said: "Most of us know we should eat plenty of fruit and veg, yet we are not sufficiently motivated to actually go ahead and eat a healthy diet.
"Knowing you are going to look more attractive in a few weeks may be more persuasive than the promise of health benefits later in life."
Scientists tracked 35 students over a six-week period, measuring natural changes in their diet and skin colour. At the same time, the researchers measured how big a change in skin colour needed to occur before it was noticed by others.
The individuals who improved their diet showed an increase in the desired golden skin tone, while the colour reduced in those whose diet had slipped.
Mr Whitehead added: "We were very surprised by how quick the changes were."
The results are published in the paper 'Appealing to vanity: could potential appearance improvement motivate fruit and vegetable consumption?' in the 'American Journal of Public Health'.