Mechanisms of Nutritional Regulation

2012 ◽  
Author(s):  
Stephen J. Simpson ◽  
David Raubenheimer
Keyword(s):  
Feeding Behavior ◽  
Nutrient Intake ◽  
Neural Circuits ◽  
Food Composition ◽  
Nutritional State ◽  
Nutritional Requirements ◽  
Taste Receptors ◽  
Nutritional Regulation ◽  
Limited Supply

This chapter focuses on how animals are able to regulate their intake and use of multiple nutrients. To regulate the balance of nutrients eaten, an animal needs to assess the composition of available foods in relation to its nutritional requirements. Integration of information about food composition and nutritional state occurs both at the periphery, by nutrient-specific modulation of taste receptors, and more centrally as signals from systemic and peripheral sources converge onto the neural circuits that control feeding behavior. Meanwhile, postingestive regulatory responses can assist in rebalancing an imbalanced nutrient intake. Once digested and absorbed across the gut, nutrient supplies can be further rebalanced by differentially voiding excess nutrients and conserving nutrients that are in limited supply.

Nocturnal patterns of macronutrient intake in freely feeding and food-deprived rats

1989 ◽  
Vol 256 (2) ◽  
pp. R541-R548 ◽  
Author(s):  
D. L. Tempel ◽  
G. Shor-Posner ◽  
D. Dwyer ◽  
S. F. Leibowitz
Keyword(s):  
Feeding Behavior ◽  
Food Deprivation ◽  
Nutrient Intake ◽  
Macronutrient Intake ◽  
Feeding Response ◽  
Feeding Patterns ◽  
Carbohydrate Ingestion ◽  
Compensatory Feeding ◽  
Nutrient Selection ◽  
Over Time

Analyses of rats' feeding behavior at the start and the end of the nocturnal cycle have revealed dramatic alterations in macronutrient intake over time. At dark onset, rats displayed a preference for carbohydrate, with the first meal of the night consisting of approximately 60% of this nutrient. This carbohydrate intake was soon followed by a shift toward protein-predominant meals. Superimposed on this pattern of meal-to-meal shifts in nutrient selection appears to be an additional rhythm in which carbohydrate ingestion was favored at dark onset and protein and fat ingestion were favored during the late dark hours. Differential feeding patterns were also apparent following mild food deprivation. A 2-h period of deprivation at dark onset produced a strong compensatory feeding response, particularly of fat and carbohydrate. This pattern was not observed at the end of the dark, when little compensatory feeding was demonstrated. It is suggested that these feeding patterns may be related to the activity of certain hypothalamic neurotransmitters, e.g., norepinephrine and serotonin, known to be important in modulating temporal feeding patterns and nutrient intake.

scholarly journals Usual nutrient intake adequacy among young, rural Zambian children

2018 ◽  
Vol 119 (1) ◽  
pp. 57-65 ◽  
Author(s):  
Bess L. Caswell ◽  
Sameera A. Talegawkar ◽  
Ward Siamusantu ◽  
Keith P. West ◽  
Amanda C. Palmer
Keyword(s):  
Nutrient Intake ◽  
Food Composition ◽  
Vitamin B ◽  
Small Fish ◽  
Efficacy Trial ◽  
Nutrient Intakes ◽  
Monthly Basis ◽  
Food Composition Tables ◽  
Macro And Micronutrients ◽  
Distribution Frequency

AbstractInadequate nutrient intakes put children at risk for impaired growth and development. We described diet, usual intakes of energy and macro- and micronutrients and prevalence of nutrient intake adequacies among 4–8-year-old Zambian children. Children not yet in school and living in Mkushi District, Central Province, Zambia were enrolled into an efficacy trial of pro-vitamin A biofortified maize. Children in the non-intervened arm were included in this analysis (n 202). Dietary intake data were collected by tablet-based 24-h recall on a monthly basis over the 6-month trial. Observed nutrient intakes were derived from reported food quantities, standard recipes and food composition tables. Usual nutrient intake distributions were modelled based on observed intakes. Prevalence of inadequacy was estimated by comparing the usual nutrient intake distribution to the nutrient requirement distribution. Frequency and quantity of consumption of commonly reported foods were described and key sources of energy and nutrients were identified. Median usual energy intake was 6422 kJ/d (1535 kcal/d). Most childrens’ macronutrient intakes fell within recommended ranges (74–98 %). Estimated prevalences of inadequate intakes of Fe, folate, vitamin B12 and Ca were 25, 57, 76 and >99 %, respectively. Estimated prevalences of inadequacy for other micronutrients were low (0·1–2·2 %). Commonly consumed foods included maize, vegetable oil, tomatoes, rape leaves and small fish (>0·6 servings/d), whereas meat, eggs or dairy were rarely eaten (<0·2 servings/d). These findings suggest that the heavily plant-based diet of rural Zambian children provides inadequate Ca, folate, vitamin B12 and Fe to meet recommended nutrient intakes.

Risk-sensitive foraging by juvenile signal crayfish (Pacifastacus leniusculus)

2006 ◽  
Vol 84 (11) ◽  
pp. 1693-1697 ◽  
Author(s):  
C.A. Bondar ◽  
K. Zeron ◽  
John S. Richardson
Keyword(s):  
Feeding Behavior ◽  
Woody Debris ◽  
Food Selection ◽  
Cutthroat Trout ◽  
Pacifastacus Leniusculus ◽  
Food Type ◽  
Nutritional Requirements ◽  
Oncorhynchus Clarkii ◽  
Signal Crayfish ◽  
Risk Sensitive Foraging

Feeding behavior of carnivorous and herbivorous organisms is commonly explained in terms of nutritional requirements. However, feeding behavior of omnivorous organisms is difficult to predict and may not be based on nutritional requirements alone. To assess the plasticity of feeding behaviors exhibited by an omnivore, we conducted a feeding experiment using juvenile signal crayfish ( Pacifastacus leniusculus (Dana, 1852)), both alone and in the presence of conspecifics and predators. Crayfish were presented with three types of food (chironomids, mayflies, and woody debris) in experimental enclosures, and the food type consumed and time to consumption were recorded. Although the same overall food choice (chironomid larvae) was made in all trials, the time it took for the juvenile crayfish to make a food selection was longer in the presence of adult conspecifics (both male and female) and adult cutthroat trout ( Oncorhynchus clarkii (Richardson, 1836)). Food selection also took longer, although not significantly, in the presence of conspecific juvenile crayfish, and no changes in behavior were noted in the presence of young-of-the-year (YOY) cutthroat trout. The altered behavior of the juvenile crayfish observed in the presence of adult fish and crayfish can lead to context-dependent effects of this omnivore on its community. Ecologists must be increasingly aware that the feeding of omnivores may not be solely based on nutritional criteria.

scholarly journals FODMAP Intake in Spanish Population: Open Approach for Risk Assessment

2020 ◽  
Vol 17 (16) ◽  
pp. 5882
Author(s):  
Jonatan Miranda ◽  
Maialen Vázquez-Polo ◽  
Gesala Pérez-Junkera ◽  
María del Pilar Fernández-Gil ◽  
María Ángeles Bustamante ◽  
...  
Keyword(s):  
Nutrient Intake ◽  
Adult Population ◽  
Age Groups ◽  
Daily Intake ◽  
Food Samples ◽  
Food Composition ◽  
Food Sources ◽  
Open Approach ◽  
Adolescents And Adults ◽  
Fermentable Carbohydrates

Fermentable oligo-, di- and monosaccharides and polyols’ (FODMAP) were related with intestinal complications. The present study aimed to determine the FODMAP consumption of Spanish children, adolescents and adults, analyzing the real FODMAP risk of foods, and to set an open methodology for the measurement of this intake in other regions as well as nutrient intake assurance. Total fructan analysis was performed analytically in eighty-seven food samples. Daily intake of FODMAPs, fiber and micronutrients was calculated by combining the food composition for selected fermentable carbohydrates with the national food consumption stratified by age in an open software. Spanish child and adolescent total FODMAP consumption was settled as 33.4 ± 92.4 and 27.3 ± 69.0 g/day, respectively. Both intakes were higher than that of the adult population (21.4 ± 56.7 g/day). The most important food sources of lactose, excess of fructose and total fructan, considering their content and dietary intake were different between age groups. The contribution of these foods to dietary calcium and fiber and the consequent risk of deficiency if they are withdrawn was highlighted. We demonstrated the relevance of stratifying the total FODMAP intake by age. An open approach for FODMAP intake quantification and nutrient control was provided.

Palm kernel cake in high-concentrate diets for feedlot goat kids: nutrient intake, digestibility, feeding behavior, nitrogen balance, blood metabolites, and performance

2021 ◽  
Vol 53 (5) ◽  
Author(s):  
Thomaz Cyro Guimarães de Carvalho Rodrigues ◽  
Stefanie Alvarenga Santos ◽  
Luis Gabriel Alves Cirne ◽  
Douglas dos Santos Pina ◽  
Henry Daniel Ruiz Alba ◽  
...  
Keyword(s):  
Feeding Behavior ◽  
Nitrogen Balance ◽  
Nutrient Intake ◽  
Palm Kernel ◽  
Blood Metabolites ◽  
Palm Kernel Cake ◽  
And Performance

scholarly journals Evaluation of Reliability of the Recomputed Nutrient Intake Data in the National Heart, Lung, and Blood Institute Twin Study

Nutrients ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 109
Author(s):  
Yecheng Yao ◽  
Sheng-Bo Chen ◽  
Gangqiang Ding ◽  
Jun Dai
Keyword(s):  
Fatty Acids ◽  
Polyunsaturated Fatty Acids ◽  
Twin Study ◽  
Nutrient Intake ◽  
Epidemiological Studies ◽  
Food Composition ◽  
Dietary History ◽  
Blood Institute ◽  
National Heart ◽  
National Heart Lung

The nutrient intake dataset is crucial in epidemiological studies. The latest version of the food composition database includes more types of nutrients than previous ones and can be used to obtain data on nutrient intake that could not be estimated before. Usual food consumption data were collected among 910 twins between 1969 and 1973 through dietary history interviews, and then used to calculate intake of eight types of nutrients (energy intake, carbohydrate, protein, cholesterol, total fat, and saturated, monounsaturated, and polyunsaturated fatty acids) in the National Heart, Lung, and Blood Institute Twin Study. We recalculated intakes using the food composition database updated in 2008. Several different statistical methods were used to evaluate the validity and the reliability of the recalculated intake data. Intra-class correlation coefficients between recalculated and original intake values were above 0.99 for all nutrients. R2 values for regression models were above 0.90 for all nutrients except polyunsaturated fatty acids (R2 = 0.63). In Bland–Altman plots, the percentage of scattering points that outlay the mean plus or minus two standard deviations lines was less than 5% for all nutrients. The arithmetic mean percentage of quintile agreement was 78.5% and that of the extreme quintile disagreement was 0.1% for all nutrients between the two datasets. Recalculated nutrient intake data is in strong agreement with the original one, supporting the reliability of the recalculated data. It is also implied that recalculation is a cost-efficient approach to obtain the intake of nutrients unavailable at baseline.

scholarly journals Dietary calcium intake does not meet the nutritional requirements of children with chronic kidney disease and on dialysis

2020 ◽  
Vol 35 (10) ◽  
pp. 1915-1923
Author(s):  
Louise McAlister ◽  
Selmy Silva ◽  
Vanessa Shaw ◽  
Rukshana Shroff
Keyword(s):  
Kidney Disease ◽  
Nutrient Intake ◽  
Bone Mineralization ◽  
Dietary Calcium Intake ◽  
Nutritional Requirements ◽  
National Kidney Foundation ◽  
Dairy Foods ◽  
Disease Outcomes ◽  
Upper Limit ◽  
The Uk

Abstract Background Adequate calcium (Ca) intake is required for bone mineralization in children. We assessed Ca intake from diet and medications in children with CKD stages 4–5 and on dialysis (CKD4–5D) and age-matched controls, comparing with the UK Reference Nutrient Intake (RNI) and international recommendations. Methods Three-day prospective diet diaries were recorded in 23 children with CKD4–5, 23 with CKD5D, and 27 controls. Doses of phosphate (P) binders and Ca supplements were recorded. Results Median dietary Ca intake in CKD4–5D was 480 (interquartile range (IQR) 300–621) vs 724 (IQR 575–852) mg/day in controls (p = 0.00002), providing 81% vs 108% RNI (p = 0.002). Seventy-six percent of patients received < 100% RNI. In CKD4–5D, 40% dietary Ca was provided from dairy foods vs 56% in controls. Eighty percent of CKD4–5D children were prescribed Ca-based P-binders, 15% Ca supplements, and 9% both medications, increasing median daily Ca intake to 1145 (IQR 665–1649) mg/day; 177% RNI. Considering the total daily Ca intake from diet and medications, 15% received < 100% RNI, 44% 100–200% RNI, and 41% > 200% RNI. Three children (6%) exceeded the National Kidney Foundation Kidney Disease Outcomes Quality Initiative (KDOQI) upper limit of 2500 mg/day. None with a total Ca intake < RNI was hypocalcemic, and only one having > 2 × RNI was hypercalcemic. Conclusions Seventy-six percent of children with CKD4–5D had a dietary Ca intake < 100% RNI. Restriction of dairy foods as part of a P-controlled diet limits Ca intake. Additional Ca from medications is required to meet the KDOQI guideline of 100–200% normal recommended Ca intake.

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