Oh sweetheart, you’re wrong on so many levels and let me enlighten you with some knowledge since you’ve clearly never taken a course in Biochemistry.
Yes, I’m completely aware that fruit is composed of fructose (where do you think the name came from?), but it in no way, shape or form “turns directly into fat instead of energy”. In order for you to even begin to understand how and why you are incorrect, we have to start at the molecular level. Once you understand how Glycolysis works I’ll take you through why your statement is false.
Glycolysis is the metabolic pathway that converts glucose into pyruvate to later be used in other metabolic processes (It’s a lovely 10 step process). You start with glucose, a monosaccharide, (which is obtained from ANY carbohydrate you consume) and an enzyme called Hexokinase tapes the glucose in the cell and begins glycolysis. I’ll keep this simple so you can comprehend, but basically glucose is converted to glucose 6-phosphate by hexokinase. Then another enzyme comes in with the name of Phosphoglucose Isomerase and what is does is it converts Glucose 6-Phosphate to Fructose 6-Phosphate by rearranging some carbons. The third step is the conversion of fructose 6-phosphate to fructose 1, 6-bisphosphate by an enzyme called Phosphofructokinase. Fourth, another enzyme called Aldolase splits Fructose 1,6-bisphosphate into two separate sugar molecules, either Dihydroxyacetone phosphate (DHAP) or Glyceraldehyde 3-phosphate (GAP). Fifth, another enzyme called Triose phosphate isomerase converts all the DHAPs into GAPs through a complex process which I won’t get into. Then GAP is converted to 1-3 bisphosphoglycerate by an enzyme called Glyceraldehyde 3-phosphate dehydrogenase. The 7th step is the conversion of 1,3 bisphosphoglycerate to 3-phosphoglycerate by an enzyme called phosphoglycerate kinase. The 8th step is converting 3-phosphoglycerate to 2-phosphoglycerate by the enzyme phosphoglycerate mutase. The 9th step is converting 2-phosphoglycerate to phosphoenolpyruvate by an enzyme called enolase and finally the 10th step is converting Phosphoenolpyruvate to Pyruvate through the enzyme pyruvate kinase. There are lots and lots of steps in between these, but I’m sure that’s of no interest to you.
Now that you understand the 10 stages of glycolysis, let’s evaluate what happens when fructose comes into the picture. Fructose, also a monosaccharide, can enter glycolysis in two different ways depending on which tissue it’s in. For simplicity, i’ll explain the most common one which happens in most tissues (excluding the liver). Fructose enters glycolysis at fructose-6 phosphate (the second stage of glycolysis) and hexokinase uses 1 molecule of ATP to convert fructose to fructose-6 phosphate, just like hexokinase uses 1 molecule of ATP to convert glucose to glucose-6 phosphate. From there, it goes through the entire processes of glycolysis, just as a molecule of glucose does. So as you can see, glucose and fructose use the same amount of energy to go through glycolysis and make the same products in the end, so basically glucose and fructose effect the body is the same way because they are both monosaccharides.
Glucose is your body’s main source of fuel used to power literally every single metabolic pathway and used to give every single cell, tissue, muscle, and organ in your body energy. So saying “it turns directly into fat instead of energy” is completely wrong. You use glucose for energy before you use anything else. Hell, your brain solely relies on glucose to function. Excess glucose that you don’t immediately use for energy is stored as glycogen in the liver (approximately 190g of glucose) to be used when you need it, and you need it quite frequently. This glycogen store is essential because without it you basically be in starvation mode the entire time and again, that’s another topic for another day. The excess glucose which isn’t immediately used and isn’t stored as glycogen, is then stored in fat cells. So no, fruit doesn’t make you fat and it isn’t immediately converted to fat. Fruit, just like other carbs, gives you energy.
Now to address part 2 of what you said “eating a high fat diet doesn’t actually cause heart attacks(unless deep fried food with cholesterol mixed together, otherwise quite harmless”
1. When in the world have I ever stated that a high fat diet causes heart attacks? My diet is VERY high in fat so I would never be so quick to say something so incorrect.
2. You also need to understand that all fat are not created equal. The fat I get from nuts is very, very different than the fat others consume through animal products. Nuts and seeds are very high in fat, but it’s not a trans or saturated fat. They are composed of poly and monounsaturated fats which are quite different than trans and saturated fat in their chemical make-up.
3. Fats which come from animal sources are very high saturated fat as well as cholesterol. Cholesterol can only be obtained through foods with animal origins (meat, dairy and eggs). A single egg yolk has 184 mg of cholesterol (you shouldn’t be eating more than 300mg a day in order to keep yourself healthy). Cholesterol is the main culprit in heart attacks.
4. So yes, eating a diet high in animal fats will put you at a predisposition and risk of heart disease as well as a heart attack. Deep fried foods aren’t the only food which contains cholesterol.
So please don’t insult my intelligence or try to challenge me when you don’t have your facts straight.