Sugar and refined carbs: the hormonal theory that challenges calorie counting

Eating less sugar and refined carbs: the solution that calorie counting can't explain

What if obesity isn't caused by calories but by hormones? That's the thesis that has been gaining ground for nearly a decade: reducing sugar and refined carbs works not so much because you eat less, but because it lowers insulin. The empirical evidence accumulated in recent years has turned this hypothesis into a headache for the nutritional establishment, which insists on repeating the mantra of "eat less and move more."

The calorie dogma vs. hormonal evidence

The central point of the controversy is simple to state: not all calories are equal for the body. A calorie from a donut spikes insulin, halts lipolysis and tells the body to store fat; a calorie from a fatty steak barely triggers insulin secretion and doesn't block access to stored reserves. This perspective, popularized by Dr. Fung, holds that obesity is not an energy problem but a hormonal signaling problem.

Defenders of calorie balance respond with the first law of thermodynamics. And some took the discussion to the pure physics of the scale, trying to balance mass, only to find that the human body doesn't behave like a steam engine. The tug-of-war between the two schools has ended in a deadlock: the former measure insulin and glycogen, the latter keep counting calories. The type 2 diabetes epidemic keeps growing while official advice has barely changed in fifty years.

Nine months of lab tests and lost kilos

The most compelling part comes from real-world trinc-ups. There are documented cases of 19 kilos lost in 20 weeks on a low-carb diet, without hunger, with continuous glucose monitoring. Even more striking is metabolic control: a stable glycated hemoglobin of 5.4 after a year and a half of ketosis, or uric acid dropping from 9 to 4.2 when fructose is eliminated. These are numbers that labs consider "within range," but that hide inflammation and still-active insulin resistance.

The underlying argument is that reference ranges are not clinical optima but simple averages of a sick population. Cases are cited of GGT at 30 U/L, labeled normal, when a healthy liver should be below 16. The conclusion is political as well as medical: if the benchmarks are drawn from the average of patients who are already damaged, the system turns statistical normality into health.

Intermittent fasting: the lever that accelerates metabolic remission

Fasting is not an optional complement but the piece that turns diet into therapy. The 16/8 pattern—fast for 16 hours and concentrate meals in 8—has become the most tolerable. But there are more demanding protocols: in 42-hour fasts, consuming a single meal of 300 to 500 calories, liver glycogen is completely depleted and autophagy is triggered, the process by which the body recycles damaged cells.

The anecdotal evidence is overwhelming on one point: hunger plummets when carbohydrates are abandoned. Those who have tried intermittent fasting describe that appetite changes in nature, that the body switches to burning fat continuously, and that you can go hours without eating without the glucose crash typical of a traditional breakfast. It's not magic: it's the difference between depending on external glucose and having alternative metabolic pathways.

The wheat we eat is no longer that of the Roman Empire

The discussion about flours goes beyond gluten. Modern wheat is a cross between two species that quadrupled production; the roots are the same and the soil is the same, so the density of micronutrients has been divided by four. Roman legionaries marched 50 km with 35 kilos on their backs on a wheat-based diet, but it was another species, fermented with natural yeast and ground fresh.

Here the argument takes a political turn: the modern food industry optimizes yield, not health. The bread of Roman slaves, healthier than today's sliced bread, is compared to a production chain that has turned a staple food into an inflammatory product. The irony is not lost on anyone: we eat more wheat than ever, but of worse quality, and public health pays the price.

Canned fish, mercury and the traps of processing

The shift toward animal protein also opens its own front: mercury in fish. Bluefin tuna and swordfish accumulate heavy metals due to their size; canned sardines, mackerel or frigate tuna have much lower levels. Some recommend limiting tuna to 100-150 grams per week and opting for small fish. There is also criticism of the official silence on other contaminants: microplastics, chemical residues and pharmaceuticals that reach the sea.

The practical recommendation is less dogmatic than it seems: prioritize unprocessed foods, yes, but without sanctifying any protein source. The official food pyramid has for decades placed refined flours at the base and tuna at the top; the opposing current argues that this pyramid is designed to feed the industry, not the population.

Carbs and sport: the trench that remains open

The last front is not obesity but performance. Some argue that a high-intensity athlete needs glycogen and that ketosis limits anaerobic effort; the other trench responds with bodybuilders who have been on a ketogenic diet for over a decade and athletes who have broken records with hardly any carbs. Roman legionaries and Huns have even been invoked to settle which regimen forged better soldiers.

Neither side has budged. Available data suggest that carbohydrate tolerance depends on activity level: a sedentary person with insulin resistance cannot process the same carbs as an elite athlete. The recipe, again, is individualization. But that doesn't sell diet books or generic exercise programs.

Verdict: neither blessing nor condemnation, but the patient improves

In the end, the question boils down to an uncomfortable one: if the official model worked, we wouldn't need this conversation. Obesity keeps rising, type 2 diabetes too, and the advice to "eat less and move more" has been failing for half a century. Those who have tried restricting sugar and refined carbs not only lose weight; their lab tests, energy and relationship with food change.

Meanwhile, the food industry keeps selling the same thing, governments look the other way, and sugar waits in the supermarket aisle. The metabolic revolution will have to wait for someone to fund it. Or for the healthcare system to be unable to pay the bill.