on November 10, 2012
at 04:50 AM
Just FYI, I tend to think that TEF is valid, but the numbers and percentages thrown out there are to be taken with a grain of salt. First off, digestion matters. TEF is going to differ in people, even when consuming the exact same type of food depending on how efficient digestion is. On one hand, we want food to fully digest and be absorbed, thus, completing the entire "thermogenic" process. However, you have folks out there with terrible digestion and their TEF may differ because of this. It's safe to say that these people are going to lose some of the energy intake from food simply because it isn't digested and/or used by the body. It's one of the reasons you see people with terrible UC, Crohn's or IBD/IBS who are massively underweight. Their TEF is likely lower but so is their caloric absorption. Here are some links.
Jonathan Bailor is not Paleo and is not embraced by many in the Paleo world because he does come off as anti-starch and somewhat anti-fat. However, he's a sharp guy, IMO, and his book is still a solid read.
Another article review from Lyle McDonald. Eh, on him, but it's worth the read.
There is a mention of it in here regarding TEF and fasting. Lean Gains has some other articles as well about this topic. I know the alcohol consumption and maintaining low BF% has an explanation of how alcohol can be a thermogenic and how it's very inefficient in being stored as fat. It's second to protein in doing so, far more than fat or carbohydrate.