Does it means that we should reduce fruits consumtion? in order to limit fructose intake. Isn't it just in the opposite direction to all that we've always heard before, about benefits of mediterranean diet? Or is the research only referred to artificially added fructose.

Big Mig No,they are talking about added sugar only. Almost all fruits are absorbed slowly,as the other factors in the fruit limit the speed of absorption.

Reply to Big Mig - you may find answers to your questions in the work of Dr. Robert Lustig. https://en.wikipedia.org/wiki/Robert_Lustig

High glycemic index carbohydrates are also serious culprits in glycogen production. So, even if one does not consume excessive amounts of sugar, watch those high GI carbs as well.

These researchers are playing it safe, by using soft drinks as the sugar source. The cowards didn't even name the drinks. So is the writer, by not finding a study of characteristic Swiss added-sugar products which actually show up on U.S. grocery shelves, like Lindt and other Swiss-made and -owned chocolates. Investigative journalism this is not.

The one sugar I'm particularly concerned about is high fructose corn syrup, and one soft drink a day is more than enough, (or none at all). I use mostly maple syrup.
michael_dowling is certainly right. The amount of fructose in an apple, orange and banana is small compared to soda pop. A glass of OJ can be as much as 4-5 oranges, and hardly anyone eats that many at once.
Sugar is a source of energy. Many animals/insects will consume it readily. Dogs who get regular sweet treats are usually chunky. lol

Lay off the Gatorade, too. Quarts of that contain 40+ grams of sugar.

While fructose is worse than glucose...sugar is still sugar and yes it would be smart to not have too much fruit. Keep in mind that fruit today is grown to produce much more sugar than the crops generations ago.

Your liver can't differentiate between the sugars in a banana and white sugar. I am 64 and always carried around an extra 25 lbs. Not much but I'm 5'10". I stopped eating sugars and grains 4 years ago and dropped the weight without extra exercise. I limit my carbs to under 30 grams a day and less most days. I learned here NSNG. I weight what I did when I got out of high school 46 years ago and feel great. you need to limit alcohol also.

Big Mig, the problem is processed and added fructose, but indeed, if you try a diet of fruits and really eat lot of them, you can't expect to be "healthy", but normal acceptable consumption of fruits is desirable...