A caloric deficit is the sole mechanism responsible for fat loss, making specific diet protocols (keto, fasting, carnivore) secondary to the laws of thermodynamics.

noli's read

The principle that a negative energy balance is necessary for weight loss is widely supported by nutritional research. Meta-analyses and randomized controlled trials (such as PMIDs 28193517 and 39732588) confirm that when calories and protein are balanced, fat loss is similar regardless of the diet followed. The creator is correct to emphasize that hormonal mechanisms (such as insulin) do not override this fundamental principle. However, stating that it is the only "important" factor may be seen as a simplification: while a deficit dictates weight loss, satiety, muscle retention, and long-term adherence are heavily influenced by food quality and macronutrient composition. Thus, the advice is scientifically robust regarding the mechanism of weight loss, but it omits the behavioral and metabolic factors that make such a deficit sustainable for a given individual.

the sources

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