Many of us believe that fruit can only be healthy and so make an effort to boost our intake - carrying apples in our bags, eating grapes or bananas at our desk and trying to stick to fruit salad for dessert.
But while it is fine to exceed this amount if you are a healthy weight, if you are overweight or suffer from high cholesterol or diabetes, too much fruit could be trouble.
It could also explain why, despite your healthy lifestyle, you're piling on the pounds.
One of the problems is people forget that fruit - like all food - contains calories.
And the calories in fruit can make you just as overweight as those in chocolate, explains Dr Carel Le Roux, consultant in metabolic medicine at Imperial College London.
We're meant to eat five portions of fruit and vegetables a day - ideally two of fruit and three of veg.
But depending on your choice, you may be consuming more fructose - or fruit sugar - than you thought.
All values are for one piece of fruit, unless specified, and the figures in brackets show the equivalent amount of sugar.
• Apricot 0.45g fructose (pinch of sugar) • Clementine 0.5g (pinch) • Plum 1.6g (large pinch) • Fresh fig 2g (1/2tsp) • Eight cherries 2.4g (1/2 tsp) • 1 slice honeydew melon 3g (over 1/2 tsp) • Kiwi fruit 3g (over 1/2 tsp) • Orange 3.6g (over 1/2 tsp) • Five strawberries 4g (1 tsp) • Glass of orange juice 5g (1 tsp) 'Different people over-eat different things,' he says.
'But the people who eat fruit to excess are often weight-conscious.