Quantifying Resistant Starch Using Novel, In Vivo Methodology and the Energetic Utilization of Fermented Starch in Pigs

摘要: To quantify the energy value of fermentable starch, 10 groups 14 pigs were assigned to one two dietary treatments comprising diets containing 45% either pregelatinized (P) or retrograded (R) corn starch. In both diets, a contrast in natural 13 C enrichment between starch and nonstarch components diet was created partition enzymatic digestion fermentation Energy protein retention measured using indirect calorimetry after adapting for 3 wk. Fecal higher R-fed (P , 0.001) 43% R resisted digestion. Energyretained as unaffected retained fat 29% lower than P-fed 0.01). Prior morning meal, end products substantially contributed substrate oxidation pigs. During 3–4 h following meals, heat production 0.05) pigs, but this not preferentially fueled by glucose from Digestible intake, metabolizable intake,andenergy reduced(P, inR-fed compared with 92, 54, 33 kJ/(kg 0.75 ×d), respectively. Therefore, values fermented resistant 53, 73, 83% digestible, metabolizable, net enzymatically degradable Creating provides promising, noninvasive, vivo method estimating proportion gastrointestinal tract. J. Nutr. doi: 10.3945/jn.111.147496.