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Ingested dietary nutrients and feed energy are partitioned among tissues to sustain body growth. Based on the respective costs of the various metabolic pathways allowing use and storage of feed energy into cells, it may be theorized that daily meal frequency could affect growth, body composition or feed efficiency. This study aimed to determine the effects of daily meal frequency on nutrient partitioning, tissue metabolism and composition, and performance. Young growing pigs (30 kg BW) were offered a same amount of feed either in 2 (M2, n = 15) or 12 (M12, n = 16) meals per day during a 3-wk interventional period. Animals fed twice a day had an accelerated weight gain (+6.4%, P &lt; 0.05) and exhibited a greater G:F (+4%, P = 0.03) than animals fed 12 meals per day during this period. Basal plasma concentrations of glucose, lactate, triglyceride, urea, and leptin were lower (P &lt; 0.001) in M2 pigs than in M12 pigs. Meal frequency also changed (P &lt; 0.001) the time-course profiles of plasma concentrations of glucose, insulin, and lactate in response to meal ingestion. A greater rise and a sharper fall in plasma glucose and insulin levels were observed in M2 pigs compared with M12 pigs. In both groups, similarities were observed in the postprandial time courses of plasma concentrations of insulin and of α-amino nitrogen (used as a measure of total AA). Despite these metabolic responses, tissue lipids, glycogen content, and enzyme activities participating in energy metabolism in muscle and liver were similar (P &gt; 0.10) in both groups at the end of the trial. Percentage of perirenal fat in the body and depth of dorsal subcutaneous fat tissue were not affected by meal frequency, but kidney weight was lower (-18%, P &lt; 0.001) in M2 pigs than in M12 pigs. Altogether, the less frequent daily meal intake improves the conversion of feed into weight gain, without marked modifications of tissue composition in young pigs.

Meal frequency changes the basal and time-course profiles of plasma nutrient concentrations and affects feed efficiency in young growing pigs1