Jamie Hale interviewing Lyle:
JH: Do you agree with the food combining theory of high fat/ high protein, high protein/ high carb, but never high fat/ high carb?
LM: Short answer: no. Although I don’t disagree that eating too many calories (which can occur with certain carb/fat foods) is probably a bad idea (see comments below).
Longer answer: The newest version of this fad appears to be based on a 10 year old outdate model where only insulin is important in storing calories as the rationale is that you don’t want to increase insulin when there is dietary fat in your system. As the logic goes: insulin is a storage hormone, insulin stores fat, if you raise insulin when you eat fat, you get fat.
A couple of problems right off the bat:
#1: Protein does a decent job of raising insulin and it takes very little insulin to affect fat cell metabolism.
#2: Dietary fat affects fat cell metabolism with NO INCREASE in insulin. At least two studies, using oral fat loading found a decrease in HSL and an activation of fat storage despite no increase in insulin. The apparent culprit, a little bastard called acylation stimulation protein (ASP) which is activated by the presence of chylomicrons (basically packaged triglycerides that are found in the bloodstream after the meal). ASP increases glucose uptake into the fat cell, increases insulin release from the pancreas and has been described as ‘the most potent stimulator of triglyceride storage’ in the fat cells.
I think that if food combining works in any fashion, it’s because it controls people’s food intake. Basically, compared to a diet where you can eat carbs and fat (the primary energy providing nutrients to the body) at all of your meals, setting up a diet where you can only eat one or the other at any given meal automatically tends to limit calorie intake even if people think they are ‘eating as much as they want’. Since you can only eat fat at three meals/day, you end up eating less of it than you would eating an uncontrolled diet where you can eat fat at every meal. Same for concentrated carbs (which can easily provide a lot of calories).
Also, a lot of people turn stupid when they bulk, they rationalize that they ‘need’ that pint of ice cream or tray of cookies to gain weight. Which means that they eat too many calories and that’s why they get fat. If food combining prevents them from doing that (and it does, but so does not eating like a lazy ass pig), of course it will ‘work’ in some fashion.
I think it’s important to note that the primary advocate of food combining (at least, the guy who repopularized what is really a very old idea) has recently made modifications to his original scheme. Now unprocessed carbs such as potatoes and beans and other low GI fare (veggies, of course) are allows with the protein/fat meals.
My question to him: What did he think people were eating with their protein/fat meals? Jelly beans and cake? So, basically, his food combining plan now allows meals to consist of protein, vegetables, low GI/unprocessed carbs and fat. Meaning that it took him several years to get right back to what just about every bodybuilding nutritionist ever has been recommending. Hooray for progress.