Fruits make you fat?

[chound]

I read in Harper's Illustrated Biochemistry, that since fruits have fructose and fructose isn't all that well regulated as glucose metabolism they can make you overweight!
Are there any studies that prove/disprove these?

For example, fructose can be metabolised without regulation and form excess ATP, NADH etc which favour lipogenesis.

[chroot]

The slight difference in metabolism of different sugars is hardly relevant to weight loss. If you eat too many calories, you'll get fat. If you eat fewer, you won't.

- Warren

[jim mcnamara]

Was the section you read discussing glycemic index of foods? Consumption of foods high in high fructose corn syrup increase insulin production, which over very long periods of time may lead to among other things, obesity.

Warren is right though. In a normal diet fruits are actually a very good thing. IT's the junk food that is the problem. Have not read your source, but it sounds like somebody made a poor choice for an analogy

[Borek]

In fact even junk food is not necesarilly a problem, as long as it is consumed in a reasonable quantities.

[gravenewworld]

It is all about calorie intake. If you eat 2 dozen oranges everyday you will get fat. You can eat McDonald's everyday and not get fat. It all depends on calories in vs. calories out. Nutrition wise, it is a much different story.

[Greg Bernhardt]

It is all about calorie intake. If you eat 2 dozen oranges everyday you will get fat. You can eat McDonald's everyday and not get fat. It all depends on calories in vs. calories out. Nutrition wise, it is a much different story.

Let's be clear, it's not intake, rather Net Intake (Gross Intake - Energy Spent). Afterall Michael Phelps ate 10,000 calories a day and he has a 6 pack.

[gravenewworld]

Let's be clear, it's not intake, rather Net Intake (Gross Intake - Energy Spent). Afterall Michael Phelps ate 10,000 calories a day and he has a 6 pack.

LIke I said, calories in vs. calories out

[chound]

But if a person ate lots of fruits, due to rapid accumulation of ATP, NADH the body will switch to lipogenesis. This will happen even before the utilsation of that ATP

However if a person took more glucose, due to regulation of glucose utilisation, the rate of formation of ATP will be slower and hence substantial amounts may get burned off!

[Ouabache]

By fruit do you mean dessert fruit or botanical fruit? If you actually mean the latter, that includes pumpkin, eggplant, tomato, aubergine, summer squash, legumes, courgette, etc.. Many of these are higher in starch, than oranges, cranberries, plums, & apples; and can increase weight gain. In general, it still comes down to whether you are burning more calories than consuming.

[Proton Soup]

fruit in general has very small amounts of fructose. also, some fruits are very low in calories, especially berries such as blackberries, strawberries, raspberries, blueberries, etc. berries are an excellent diet food.

if a Biochemistry book is warning people not to eat fruit, you should burn that book. that's about as nutty as some bodybuilders and their "clean" eating religion.