Author: Marcia Helena P. MonacoPublisher:
ISBN:
Category : Low-protein diet
Languages : en
Pages : 212
Book Description
Assessment of Riboflavin Status in Chronically Deficient Rats and the Effect of Dietary Protein Upon Riboflavin Status
Author: Marcia Helena P. MonacoPublisher:
ISBN:
Category : Low-protein diet
Languages : en
Pages : 212
Book Description
Thiamin, Riboflavin, and Vitamin B-6 Status of Folacin Deficient Weanling Rats
Author: Susan G. OstertagPublisher:
ISBN:
Category : Folic acid deficiency
Languages : en
Pages : 230
Book Description
Effect of Dietary Variations on the Thiamine and Riboflavin Status of Rats
Author: A. Parvathi BaiPublisher:
ISBN:
Category : Nutrition
Languages : en
Pages : 136
Book Description
Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline
Author: Institute of MedicinePublisher: National Academies Press
ISBN: 030913269X
Category : Medical
Languages : en
Pages : 591
Book Description
Since 1941, Recommended Dietary Allowances (RDAs) has been recognized as the most authoritative source of information on nutrient levels for healthy people. Since publication of the 10th edition in 1989, there has been rising awareness of the impact of nutrition on chronic disease. In light of new research findings and a growing public focus on nutrition and health, the expert panel responsible for formulation RDAs reviewed and expanded its approachâ€"the result: Dietary Reference Intakes. This new series of references greatly extends the scope and application of previous nutrient guidelines. For each nutrient the book presents what is known about how the nutrient functions in the human body, what the best method is to determine its requirements, which factors (caffeine or exercise, for example) may affect how it works, and how the nutrient may be related to chronic disease. This volume of the series presents information about thiamin, riboflavin, niacin, vitamin B6, folate, vitamin B12, pantothenic acid, biotin, and choline. Based on analysis of nutrient metabolism in humans and data on intakes in the U.S. population, the committee recommends intakes for each age groupâ€"from the first days of life through childhood, sexual maturity, midlife, and the later years. Recommendations for pregnancy and lactation also are made, and the book identifies when intake of a nutrient may be too much. Representing a new paradigm for the nutrition community, Dietary Reference Intakes encompasses: Estimated Average Requirements (EARs). These are used to set Recommended Dietary Allowances. Recommended Dietary Allowances (RDAs). Intakes that meet the RDA are likely to meet the nutrient requirement of nearly all individuals in a life-stage and gender group. Adequate Intakes (AIs). These are used instead of RDAs when an EAR cannot be calculated. Both the RDA and the AI may be used as goals for individual intake. Tolerable Upper Intake Levels (ULs). Intakes below the UL are unlikely to pose risks of adverse health effects in healthy people. This new framework encompasses both essential nutrients and other food components thought to pay a role in health, such as dietary fiber. It incorporates functional endpoints and examines the relationship between dose and response in determining adequacy and the hazards of excess intake for each nutrient.
Nutrient Requirements of Laboratory Animals,
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309051266
Category : Science
Languages : en
Pages : 188
Book Description
In the years since the third edition of this indispensable reference was published, a great deal has been learned about the nutritional requirements of common laboratory species: rat, mouse, guinea pig, hamster, gerbil, and vole. The Fourth Revised Edition presents the current expert understanding of the lipid, carbohydrate, protein, mineral, vitamin, and other nutritional needs of these animals. The extensive use of tables provides easy access to a wealth of comprehensive data and resource information. The volume also provides an expanded background discussion of general dietary considerations. In addition to a more user-friendly organization, new features in this edition include: A significantly expanded section on dietary requirements for rats, reporting substantial new findings. A new section on nutrients that are not required but that may produce beneficial results. New information on growth and reproductive performance among the most commonly used strains of rats and mice and on several hamster species. An expanded discussion of diet formulation and preparationâ€"including sample diets of both purified and natural ingredients. New information on mineral deficiency and toxicity, including warning signs. This authoritative resource will be important to researchers, laboratory technicians, and manufacturers of laboratory animal feed.
Effect of Dietary Factors on Riboflavin Requirement, Nitrogen Utilization and Red Cell Riboflavin in Growing Rats
Author: Marjorie Jean CaldwellPublisher:
ISBN:
Category : Proteins
Languages : en
Pages : 316
Book Description
P4-20-02 - Plasma Riboflavin Concentration as Novel Indicator for Vitamin-B2 Status Assessment: Suggested Cutoffs and Its Association with Vitamin-B6 Status in Women
Author: Yvonne LamersPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Riboflavin (vitamin B2), as the coenzymes flavin mononucleotide (FMN) and flavin dinucleotide (FAD), is essential for oxidation-reduction reactions and energy metabolism. Riboflavin also interacts with vitamin B12, B6 and folate in one-carbon metabolism, and is required for the conversion of dietary vitamin B6 forms to the coenzyme pyridoxal 5u2019-phosphate (PLP). Biochemical riboflavin status is rarely measured given the lack of convenient and accessible biomarkers. The current gold-standard marker is erythrocyte glutathione reductase activation coefficient (EGRac) that involves laborious sample processing. High prevalence of riboflavin deficiency (EGRac u22651.4) and suboptimal status (EGRac of 1.3-1.39) have been reported in the UK and Ireland; yet the functional significance is unclear. Plasma riboflavin concentration may serve as an alternative indicator; its association with related metabolites has not yet been investigated. Secondary analysis was conducted to derive a reference interval for plasma riboflavin, to determine the change-point of plasma riboflavin with EGRac, and to determine the association of riboflavin status with plasma PLP, using data of 223 older adult women from a cross-sectional study. Fasting blood samples and sociodemographic, anthropometric and dietary data were available for a convenience sample of 223 older adult women. Plasma PLP and related metabolites were quantified using isotope-dilution liquid chromatography-tandem mass spectrometry. The median (IQR) plasma riboflavin concentration was 15.7 (11.2, 23.9); and the upper and lower limits (90%CI) of the central 95% reference interval were 6.70 (6.33, 7.79) and 64.2 (55.0, 74.6) nmol/L, respectively. The change-point (95% CI) between EGRac and plasma riboflavin occurred at plasma riboflavin concentration of 26.5 (20.5; 32.5) nmol/L (with EGRac of 1.25). Plasma PLP (geometric mean (95%CI)) was significantly lower in women with riboflavin deficiency, 54.0 (46.8, 62.2) nmol/L (n=64), and suboptimal riboflavin status, 56.1 (48.9, 64.3) nmol/L (n=48), compared to those with riboflavin adequacy, 135 (112, 161) nmol/L (n=110). Plasma PLP was positively associated with plasma riboflavin concentration after adjustment for total B6 intake, age, ethnicity, BMI, education, household income and C-reactive protein concentration [u03b2 (95% CI)=1.66 (0.38, 2.94) nmol/L; p=0.012]; a significant interaction between plasma riboflavin and total dietary B6 intake was observed (p=0.032). In conclusion, we are presenting for the first time a reference range for plasma riboflavin concentration and its change-point with EGRac in healthy women. Vitamin B6 status is strongly associated with riboflavin status; more research is needed to elucidate this relationship in a larger sample and ideally intervention study.
Riboflavin
Author: Richard S. RivlinPublisher: Springer
ISBN:
Category : Health & Fitness
Languages : en
Pages : 458
Book Description
This volume represents an interdisciplinary approach to an understanding of the chemistry, physiology, and medical significance of the vitamin riboflavin. Information has been reviewed on the physiological role of the vitamin, the metabolic effects of riboflavin deficiency in animals and man, and the regulation of riboflavin metabolism. In each chapter early background material has been included, but the major emphasis has been on the many recent advances that have been made. The early chapters of the book are concerned with the physical and chemical properties of riboflavin and its coenzyme derivatives and the nature of the interactions between flavoprotein apoenzymes and their coenzymes. The various methods currently available for measuring f1avins in biological tissues, particularly in man, have been described in detail, together with newer procedures that appear to have certain advantages over existing techniques. Chapters dealing with the absorption, excretion, and metabolism of riboflavin provide basic data on the processes involved in vitamin uptake and in metabolic transformations.
Effect of dietary protein quality on vitamin B6 status in the rat
Author: James Harold FisherPublisher:
ISBN:
Category : Proteins
Languages : en
Pages : 50
Book Description
Author: