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Unconnected body accrual of dietary lipid and protein in rats fed diets with different lipid and protein content
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Scope: Eating large amounts of fat is usually associated with fat accumulation. However, different types of diets (not only lipids) elicit different metabolic responses. Methods and results: Male and female rats (10 week-old) are distributed in four groups and fed for 1 month a standard diet (SD), or this diet enriched with either lipid (high-fat diet, HF) or protein (high-protein diet, HP), or a cafeteria diet (CAF). Both HF and CAF diets share the percentage of energy from lipids (40%) but these are different. Protein-derived energy in the HP diet is also 40%. Feeding SD, HF, and HP diets does not result in differences in energy intake, energy expenditure, total body weight, or lipid content. However, the CAF-fed groups show increases in these parameters, which are more marked in the male rats. The CAF diet increases the mass of adipose tissue while the HF diet does not. Conclusion: Different diets produce substantial changes in the fate of ingested nutrient energy. Dietary lipids are not essential for sustaining an increase in body lipid (or adipose tissue) content. Body protein accrual is unrelated to dietary lipids and overall energy intake. Both protein and lipid accrual are more efficient in male rats.
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OLIVA LORENZO, Laia, ARANDA, Tània, ALEMANY, Marià, FERNÁNDEZ LÓPEZ, José antonio, REMESAR BETLLOCH, Xavier. Unconnected body accrual of dietary lipid and protein in rats fed diets with different lipid and protein content. _Molecular Nutrition & Food Research_. 2020. Vol. 64, núm. 15, pàgs. 2000265. [consulta: 23 de febrer de 2026]. ISSN: 1613-4125. [Disponible a: https://hdl.handle.net/2445/172102]