We all have to unlearn all the ‘common sense’ slogans about healthy diet and weight loss parroted by advocates of the low-cal/low-fat ‘hunger games.’ ‘A calorie is a calorie is a calorie,’ goes one slogan. But slogans are not science.
One bit of real science everyone on the keto lifestyle ought to know is the 1957 study by Kekwick and Pawan. These two respected British doctors/researchers experimented with a 1000 calorie diet. The dieters were divided in groups. One group got 90% of their calories from carbohydrates, another got 90% from protein, and another got 90% from fat.
If ‘a calorie is a calorie is a calorie’ is a slogan with any validity, all of those diets should have had pretty much the same results. But the 90% carb dieters lost very little weight, the 90% protein dieters lost more, and the 90% fat dieters lost the most. The macronutrients (carbohydrate, protein, fat) in the food made more difference than the sheer calorie count!
Maybe that makes you wonder what a calorie is, anyway. It is the measure of the energy in food, if you burned it in a lab. But we don’t burn our food in a lab. We metabolize it in our bodies, and our bodies treat the different macronutrients in different ways.
That’s why on keto we can’t substitute a 100 calorie candy bar for 100 calories worth of our low-carb vegetables, or 100 calories worth of butter. Our body handles different foods in different ways. In my own case, 100 calories of a candy bar would likely trigger a carbohydrate binge which would send my blood sugar and my weight right up. 100 calories worth of low-carb veggies would not, and 100 calories of butter, perhaps in a bulletproof coffee, would prevent my carb cravings and make me forget to eat the next meal. (Yes, even a chow-hound like me can say ‘no’ to food on keto!)
Since keto/lowcarb is not a temporary fad diet but a lifelong way of eating, we need to know about the science behind the approach. Memorize those names— Kekwick and Pawan— and the year— 1957. The study in question was published in the journal Metabolism Clinical and Experimental, and the study was called “Metabolic Study in Human Obesity with Isocaloric Diets High in Fat, Protein or Carbohydrate,” by authors A. Kekwick and G. L. Pawan. Sadly, I could not find this study on the Internet.
If I had a medical degree and the ability to get things published, I would love to publish a short book with medical journal articles supporting the keto/low-carb lifestyle, and one of the first articles I would love to reprint in the book would be the Kekwick and Pawan study. Such a book would be a great little thing for us Ketonians to pass on to our skeptical doctors and non-doctor ‘health-care providers’ who would rather we use pills and, if necessary, low-cal/low-fat hunger diets in a vain attempt to improve our health.
I tend to post ketogenic lifestyle topics on Thursdays. I hope some of my readers find these posts useful.