Relative fat oxidation is higher in children than adults
Kostyak, John C.; Kris-Etherton, Penny; Bagshaw, Deborah; DeLany, James P.; Farrell, Peter A.
Background: Prepubescent children may oxidize fatty acids more readily than adults. Therefore, dietary fat needs would be higher for children compared with adults. The dietary fat recommendations are higher for children 4 to 18 yrs (i.e., 25 to 35% of energy) compared with adults (i.e., 20 to 35% of energy). Despite this, many parents and children restrict dietary fat for health reasons. Methods: This study assessed whether rates of fat oxidation are similar between prepubescent children and adults. Ten children (8.7 ± 1.4 yr, 33 ± 13 kg mean ± SD) in Tanner stage 1 and 10 adults (41.6 ± 8 yr, 74 ± 13 kg) were fed a weight maintenance diet for three days to maintain body weight and to establish a consistent background for metabolic rate measurements (all foods provided). Metabolic rate was measured on three separate occasions before and immediately after breakfast and for 9 hrs using a hood system (twice) or a room calorimeter (once) where continuous metabolic measurements were taken. Results: During all three sessions whole body fat oxidation was higher in children (lower RQ) compared to adults (mean RQ= 0.84 ± .016 for children and 0.87 ± .02, for adults, p < 0.02). Although, total grams of fat oxidized was similar in children (62.7 ± 20 g/24 hrs) compared to adults (51.4 ± 19 g/24 hrs), the grams of fat oxidized relative to calorie expenditure was higher in children (0.047 ± .01 g/kcal, compared to adults (0.032 ± .01 p < 0.02). Females oxidized more fat relative to calorie expenditure than males of a similar age. A two way ANOVA showed no interaction between gender and age in terms of fax oxidation. Conclusion: These data suggest that fat oxidation relative to total calorie expenditure is higher in prepubescent children than in adults. Consistent with current dietary guidelines, a moderate fat diet is appropriate for children within the context of a diet that meets their energy and nutrient needs. Originally published Nutrition Journal, Vol. 6, No. 19, Aug 2007
Kostyak, John C., & Kris-Etherton, Penny, & Bagshaw, Deborah, & DeLany, James P., & Farrell, Peter A.. (August 2007). Relative fat oxidation is higher in children than adults. Nutrition Journal, 6(19), 1- 7. Retrieved from http://hdl.handle.net/10342/3310
Kostyak, John C., and Kris-Etherton, Penny, and Bagshaw, Deborah, and DeLany, James P., and Farrell, Peter A.. "Relative fat oxidation is higher in children than adults". Nutrition Journal. 6:19. (1-7), August 2007. November 18, 2018. http://hdl.handle.net/10342/3310.
Kostyak, John C. and Kris-Etherton, Penny and Bagshaw, Deborah and DeLany, James P. and Farrell, Peter A., "Relative fat oxidation is higher in children than adults," Nutrition Journal 6, no. 19 (August 2007), http://hdl.handle.net/10342/3310 (accessed November 18, 2018).
Kostyak, John C., Kris-Etherton, Penny, Bagshaw, Deborah, DeLany, James P., Farrell, Peter A.. Relative fat oxidation is higher in children than adults. Nutrition Journal. August 2007; 6(19): 1-7. http://hdl.handle.net/10342/3310. Accessed November 18, 2018.
East Carolina University