Study: Fat is stored quicker than carbohydrates during overfeeding

(German Ketonian) #1

What do you think about the results in this study:

Both the amount and composition of food eaten influence body-weight regulation. The purpose of this study was to determine whether and by what mechanism excess dietary fat leads to greater fat accumulation than does excess dietary carbohydrate. We overfed isoenergetic amounts (50% above energy requirements) of fat and carbohydrate (for 14 d each) to nine lean and seven obese men. A whole-room calorimeter was used to measure energy expenditure and nutrient oxidation on days 0, 1, 7, and 14 of each overfeeding period. From energy and nutrient balances (intake-expenditure) we estimated the amount and composition of energy stored. Carbohydrate overfeeding produced progressive increases in carbohydrate oxidation and total energy expenditure resulting in 75-85% of excess energy being stored. Alternatively, fat overfeeding had minimal effects on fat oxidation and total energy expenditure, leading to storage of 90-95% of excess energy. Excess dietary fat leads to greater fat accumulation than does excess dietary carbohydrate, and the difference was greatest early in the overfeeding period.

Source

#2

Following

(German Ketonian) #3

My 2 cents: It think the higher density of energy causes fat to be stored quicker in the presence of much insulin, which wasn’t controlled for. Therefore I think the results are unsurprising. For any ketonian out here, the study will most likely not apply, IMHO.

(Edith) #4

I bet this study was done on non fat adapted individuals.

(Omar) #5

My study :joy: does not share the same result.

Any little carb will increase my weight while I am losing weight when literally drinking butter and coconut oil.

I can make studies as well. But I do not think any science magazine will publish it for me.:joy:

(Ken) #6

It appears to me that they’re referring to fat storage within an insulinogenic, lipogenic hormonal secretion pattern. It’s no surprise the fat is efficiently stored within that context. It’s really just validation, nothing new.

A lipolytic, glucagon secretiing pattern (keto) is clearly different.

(German Ketonian) #7

that was my hunch (see my second post)

(Allan Misner) #8

The study makes sense for a few reasons:

  1. 14 days, so the subjects were not fat adapted or in ketosis.
  2. The subjects on both sides likely still ate substantial carbs.
  3. The subjects ate excess calories.

What the conclusion should have said is don’t eat above your energy requirements or you’re going to gain weight.

(Alec) #9

Very difficult to make intelligent judgments on science that is behind a paywall.