Thread: Fat Spillover During Short Carb-up/Refeed

Originally Posted by MonStar

Today I feel very soft/flabby. Is it possible to get substantial fat spillover in an hour and a half?

No. Despite everyones thoughts it is actually very hard to create a situation of massive de-novo-lipogenesis due to very short term carbohydrate overfeeding like that one... Especially if you are coming from a low carb, hypocalorific state...

You usually just stuff your glycogen stores and increase thermogenesis substantially.... Here are a few studies:
Over-feeding
In females

And, even if you do get some lipogenesis, the amount would be insignificant in terms of your total body fat levels and you would not visually notice it.

How you feel may be a combination of your psychological thoughts as well as water retention (you ate salty foods + lots of carbs).

Wow, great articles! I am going to post the first one.

Nutritional influences on lipogenesis and thermogenesis after a carbohydrate meal
K. J. Acheson, Y. Schutz, T. Bessard, E. Ravussin, E. Jequier and J. P. Flatt


In vivo lipogenesis and thermogenesis were studied for 24 h after ingestion of 500 g of carbohydrate (CHO) in subjects who had consumed either a high-fat, a mixed, or a high-CHO diet during the 3-6 days preceding the test. CHO oxidation and conversion to fat was significantly less in the high-fat diet group (222 +/- 5 g) than in the mixed (300 +/- 13 g) or high-CHO diet (331 +/- 7 g) groups, resulting in a greater glycogen storage in the high-fat (278 +/- 6 g) than in the other two groups (197 +/- 11 and 170 +/- 2 g). Net lipogenesis occurred sooner and lasted longer in the high-CHO group, amounting to 0.8 +/- 0.5, 3.4 +/- 0.6, and 9 +/- 1 g of lipid synthesized in the high-fat, mixed, and high-CHO groups, respectively. The thermic effect of the CHO load was 5.2 +/- 0.5% on the high-fat, 6.5 +/- 0.4% on the mixed diet, and 8.6 +/- 0.4% on the high-CHO diet. Significant relationships were demonstrated between the postabsorptive nonprotein respiratory quotient and net lipogenesis after the CHO load (r = 0.82) and between net lipogenesis and the increase in energy expenditure (r = 0.71). It is concluded that the antecedent diet influences the amount of net lipogenesis and the magnitude of thermogenesis after a large CHO test meal. However, lipogenesis remains too limited even after such large CHO intakes to cause an increase in the body's fat content.