Calcium Metabolism in Man as Affected by Time and by Level of Protein and Phosphorus Intake PDF Download

Author: Maren Hegsted
Publisher:
ISBN:
Category : Calcium
Languages : en
Pages : 208

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Author: Michael B. Zemel
Publisher:
ISBN:
Category : Calcium
Languages : en
Pages : 224

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Author: Harold H. Draper
Publisher: Springer Science & Business Media
ISBN: 1475790929
Category : Technology & Engineering
Languages : en
Pages : 325

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Book Description
Nutrition and Osteoporosis: Seeing Through a Glass, Darkly (1 Cor. 13:12) This volume of Advances in Nutritional Research deals with the present state of knowledge relative to the role of nutrition in the etiology of osteoporosis, one of the most serious degenerative diseases in the aging population. As a back drop for subsequent chapters on specific nutrients, Chapter 1 provides a com prehensive account of the gain and loss of bone throughout the life cycle, with emphasis on the architectural changes in later life that predispose to osteoporotic bone fractures. Chapter 2 documents the occurrence of aging bone loss through out human archeological history and Chapter 3 extends this documentation to all non-human vertebrate species so far examined, including primates living in the wild. It is apparent that a progressive loss of bone tissue is a normal accompaniment of aging among higher vertebrates. Whether it is a cause of bone fractures in animals, as it is in humans, is still unknown. It has also been established that there are significant differences in the frequency of osteoporotic fractures among human families, ethnic groups, national populations and diet cultures. Numerous studies have been carried out in an effort to explain these differences, and many of these deal with the possible effect of nutrition. Protracted controversies over the role of nutrition in the etiology of osteoporosis are reflected in the contents of several of the ensuing chapters.

Author: Sally Ann Schuette
Publisher:
ISBN:
Category : Calcium
Languages : en
Pages : 282

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Author: Younghee Kim
Publisher:
ISBN:
Category : Calcium
Languages : en
Pages : 240

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Abstract: To determine the effects of protein, calcium, and phosphorus intake on calcium, phosphorus, and magnesium metabolism, calciuria was studied, and the effect of 2 levels of phosphorus on the calcium, phosphorus, and magnesium metabolisms at 2 levels of calcium was studied. An increase of phosphorus intake significantly decreased urinary calcium at both calcium intake levels, calcium absorption at 2400 mg calcium intake, and magnesium absorption and urinary magnesium, and significantly increased phosphorus absorption and urinary phosphorus. An increase of calcium intake significantly increased calcium absorption and urinary calcium, and significantly decreased phosphorus and magnesium absorption and urinary phosphorus and magnesium. Increase of dietary phosphorus increased phosphorus retention and increase of dietary calcium increased calcium retention but reduced magnesium retention. Increase of both phosphorus and calcium significantly decreased magnesium absorption and retention and urinary magnesium.

Author: James Irving
Publisher: Elsevier
ISBN: 0323158862
Category : Medical
Languages : en
Pages : 257

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Book Description
Calcium and Phosphorus Metabolism focuses on the metabolism of calcium and inorganic phosphorus and covers topics ranging from the mechanism of calcium and phosphorus absorption in the intestine to calcium and phosphorus balances and retention. The results of balance experiments on the intestinal absorption of calcium and phosphorus are also presented. This book is comprised of 15 chapters and begins with an introduction to dietary sources of calcium and phosphorus, including water. The influence of vitamin D on the mechanism of calcium and phosphorus absorption in the intestine is then examined, along with calcium and phosphorus content of the body; recommended daily calcium and phosphorus requirements; calcium and phosphorus in the blood; and bone formation and resorption. The remaining chapters explore the chemical and organic composition of bone, together with theories of mineralization and the action of endocrine glands on bone as well as calcium and phosphorus metabolism. The final chapter is devoted to the metabolism of calcium and phosphorus in the teeth. This monograph will serve as a useful guide for biochemists and physiologists.

Author: Shaul Massry
Publisher: Springer Science & Business Media
ISBN: 1461342171
Category : Medical
Languages : en
Pages : 611

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Book Description
We present to our readers the proceedings of the Second International Workshop on Phosphate. A short account of the history of the effort led to the Phosphate Workshops is appro priate and can be of interest to the reader. The idea for Phosphate Workshops was born in the early days of November, 1974. One of us (S. G. M. ) suggested the thought to a group of scientists gathered for a luncheon in one of the attrac tive small restaurants in Weisbaden, Germany. The purpose of the workshop was to bring together interested scientists to discuss the newer developments and the recent advances in the field of phosphate metabolism and the other related minerals. An Organizing Committee made of Shaul G. Massry (USA), Louis V. Avioli (USA), Philippe Bordier (France), Herbert Fleisch (Switzerland), and Eduardo Slatopolsky (USA) was formed. The First Workshop was held in Paris during June 5-6, 1975 and was hosted by Dr. Philippe Bordier. Its proceeding was already published. The Second Workshop took place in Heidelberg during June 28-30, 1976 and was hosted by Dr. Eberhard Ritz. Both of these workshops were extremely successful scientific endeavors, and the need for them was demonstrated by the great interest they generated among the scientific community. The Or ganizing Committee, therefore, decided to continue with the tradi tion to hold additional Workshops annually or every other year.

Author: Institute of Medicine
Publisher: National Academies Press
ISBN: 0309172810
Category : Technology & Engineering
Languages : en
Pages : 448

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Book Description
It is a commonly held belief that athletes, particularly body builders, have greater requirements for dietary protein than sedentary individuals. However, the evidence in support of this contention is controversial. This book is the latest in a series of publications designed to inform both civilian and military scientists and personnel about issues related to nutrition and military service. Among the many other stressors they experience, soldiers face unique nutritional demands during combat. Of particular concern is the role that dietary protein might play in controlling muscle mass and strength, response to injury and infection, and cognitive performance. The first part of the book contains the committee's summary of the workshop, responses to the Army's questions, conclusions, and recommendations. The remainder of the book contains papers contributed by speakers at the workshop on such topics as, the effects of aging and hormones on regulation of muscle mass and function, alterations in protein metabolism due to the stress of injury or infection, the role of individual amino acids, the components of proteins, as neurotransmitters, hormones, and modulators of various physiological processes, and the efficacy and safety considerations associated with dietary supplements aimed at enhancing performance.

Author: James Irving
Publisher: Academic Press
ISBN:
Category : Medical
Languages : en
Pages : 266

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Book Description
Abstract: Useful for biologists, biochemists, medical and dental researchers, other persons interested in mineral metabolism, and biology and medical students, the text provides current knowledge of the physiology of calcium and phosphorus. Topics are: dietary sources of calcium and phosphorus; mechanism of calcium and phosphorus absorption in the intestine--the action of vitamin D; intestinal absorption of calcium and phosphorus data from balance experiments; calcium and phosphorus content of the body; calcium and phosphorus balances and retention; recommended daily calcium and phosphorus requirements; blood calcium and phosphorus; bone formation and resorption; bone; dietary factors on bone and calcium and phosphorus matabolism; action of endocrine glands on bone and calcium and phosphorus metabolism; calcium and phosphorus metabolism of the teeth; excretion of calcium and phosphorous in the urine; kinetic and cybernetic analysis of calcium metabolism; and cellular functions of calcium.

Author: Institute of Medicine
Publisher: National Academies Press
ISBN: 0309064031
Category : Medical
Languages : en
Pages : 449

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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. The first volume of Dietary Reference Intakes includes calcium, phosphorus, magnesium, vitamin D, and fluoride. The second book in 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.