Nutrition
Protein for Weight Loss
Protein is a fascinating topic in weight loss. Over 40 years ago, researchers proved that a pure protein diet works just as well as fasting, but without losing muscle mass.
Nutrition
Protein is a fascinating topic in weight loss. Over 40 years ago, researchers proved that a pure protein diet works just as well as fasting, but without losing muscle mass.
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Protein in the diet is a fascinating topic — and it's not a recent discussion that protein plays a key role in weight loss.
What most people don't know: protein in the diet became famous more than 40 years ago.
Back then, it was proven that a pure protein diet (meaning: calories only from protein, plus water, minerals, vitamins, etc.) produces the same weight loss as true fasting, with the advantage that no lean muscle mass is lost. And this means: the net effect of protein diets is actually better than that of pure fasting.
Such pure protein diets were called Protein Sparing Modified Fast back then, or PSMF for short.
Protein itself has several advantages that are useful in a diet:
This happens because protein intake triggers the release of certain intestinal hormones that create satiety. At the same time, certain amino acids (BCAAs) regulate specific signaling pathways within brain cells — ones responsible for suppressing hunger. And of course, the body craves these valuable essential amino acids, since everything in the body is made of proteins.
Metabolizing macronutrients — fats, carbohydrates, and proteins — always requires energy. It turns out that protein is the most "generous" in this regard: up to 30% of calories consumed as protein are essentially "lost" to metabolism. But since protein itself isn't an efficient calorie source (after all, it must be used to build structures in the body), the net effect is actually negative. This is exactly what was discovered in the 1970s: PSMF ultimately works better than pure fasting.
That protein is more than just a food component becomes clear when examining [source no longer available]. It's simple to understand: wild animals regulate their total calorie intake based on the protein they consume. In other words: the less protein in the diet, the more fat and carbohydrate calories — and thus total calories — are consumed. And conversely, the higher the protein content in the diet, the lower the total calorie intake. At least within certain limits.
The respected nutritional scientist Kevin D. Hall [source no longer available].
By the way, this man is no ordinary researcher — he's the section head of the Division of Integrative Physiology at the National Institute of Diabetes and Digestive and Kidney Diseases, which in turn is part of the National Institutes of Health — essentially the most important U.S. research institution on this topic.
He puts it bluntly: since the 1970s, protein consumption has declined by 1%. This seemingly small decline alone, according to Hall, could account for a dramatic increase in daily calorie intake (200 to 300 kcal) that has been observed since the 1970s. This would make the protein leverage effect at least partially explain why the U.S. population continues to gain weight.
Of course, these are ultimately hypotheses and mathematical models. Maybe there's something to it.
Long story short: if you're struggling to lose weight — assuming your metabolism is functioning normally (thyroid hormones, etc.) — try simply increasing the protein proportion of your diet. This alone could be enough to achieve significant results almost without effort. Sometimes you just need to use your head.
