Michael F. Holick – författare

This volume provides an overview of the topics discussed at the Sixth International Arnold Rikli Symposium on the Biological Effects of Light held in Boston, Massachusetts in the summer of 2001. In the tradition of the Symposium, the general topics include a broad range of perspectives regarding the biologic effects of sunlight and artificial ultraviolet radiation. In addition, the volume provides a great grandson's perspective about the life and contributions of Arnold Rikli, for whom the Symposium is named.

We take for granted the tremendous energy and vitality that the sun provides for earth's inhabitants. As we enter the new millennium, it is worthwhile to review how our ancestors perceived the biologic effects of sunlight, and how science and medicine have advanced our knowledge about the biologic effects of light. At the end of the 1800s, investigators explored the use of sunlight and artificial radiation for treating a multitude of diseases. These explorations gave rise to photodynamic therapy, phototherapy, and chemophototherapy. However, enthusiasm for using sunlight and artificial ra diation to treat disease was dampened with the birth of pharmacology. It was the goal of the Fifth International Arnold Rikli Symposium on the Biologic Effects of Light, held in Basel, Switzerland, on November 1-3, 1998, to review the history of phototherapy and have some of the world's leading experts on the biologic effects of light provide perspectives on the positive and negative effects of light. The general topics included a broad range of biologic effects of sunlight, artificial ultraviolet radiation and electromagnetic radiation.Special sessions on radiation and vitamin D and bone health, photoimmunology, biopositive effects of UV radiation, effects of electromagnetic currents and fields, and ocular and non-ocular regulation of circadian rhythms and melatonin, should be of interest.

As humans ventured into the twentieth century, the industrialized countries were confronted with the scourge of rickets. Although solariums were becoming common in the early 1900s and phototherapy was gaining popularity as a result of the awarding of a Nobel Prize to Finsen in 1903, it wasn't until 1921 when Hess and Unger demonstrated that rickets could be cured by exposure to sunlight that the healthful benefit of sun exposure appreciated. In 1941, Apperly (Cancer Research; 1: 191-195, 1941) noted that the occasional increased risk of skin cancer was associated with a decreased risk of many other more common and serious cancers. The alarming increase in the number of cases of skin cancer, especially melanoma, has caused great concern about the negative role of sunlight in health. The Sixth International Arnold Rikli Symposium on the Biologic Effects of Light was held in Boston, Massachusetts from June 16th - 18th, 2001. The goal of this Symposium was to focus on the very popular practice of tanning either by sunlight or by artificial light sources and the overall impact this practice has on health and disease. The program was organized by members of the Scientific Advisory Committee and my co-chair emeritus, Professor Ernst G. Jung. The Program Committee organized an outstanding state-of-the-art program that was enthusiastically received by the participants.

It is remarkable how much we take for granted the tremendous energy and vitality that the sun provides earth's inhabitants. As we enter the new millennium, it is worthwhile to review how our ancestors perceived the biologic effects of sunlight, and how science and medicine have advanced our knowledge about the biologic effects of light. At the turn of the century, a multitude of investigators explored the use of sunlight and artificial radiation for treating a multitude of diseases. These explorations gave rise to photodynamic therapy, phototherapy, and chemophototherapy. However, enthusiasm for using sunlight and artificial radiation to treat disease was dampened with the birth of pharmacology. It was the goal of the Fifth International Arnold Rikli Symposium on the Biologic Effects of Light, held in Basel, Switzerland, on November 1-3, 1998, to review the history of phototherapy and have some of the world's leading experts on the biologic effects of light provide new perspectives on the positive and negative effects of light. The general topics included a broad range of biologic effects of sunlight, artificial ultraviolet radiation and electromagnetic radiation. Special sessions on radiation and vitamin D and bone health, photoimmunology, biopositive effects of UV radiation, effects of electromagnetic currents and fields, and ocular and non-ocular regulation of circadian rhythms and melatonin, should be of particular interest to readers of Biologic Effects of Light.

In Vitamin D: Physiology, Molecular Biology, and Clinical Applications, Second Edition, Volume 1, leading researchers provide a comprehensive, highly readable overview of the biological functions and clinical applications of vitamin D and its metabolites.

This newly revised edition contains updated versions of all of the topics that were in the first edition and has been substantially expanded with an additional 5 chapters. Each chapter includes information from the most up-to-date research on how nutritional factors can affect bone health, written with an evidence-based focus and complete with comprehensive references for each subject. Nutrition and Bone Health, second edition covers all aspects of nutrition and the skeleton, from the history and fundamentals, to the effects of macronutrients, minerals, vitamins, and supplements, and even covers the effects of lifestyle, the different life stages, and nutrition-related disorders and secondary osteoporosis. New chapters include HIV & AIDs and the skeleton, celiac disease and bone health, and nutrition and bone health in space. Nutrition and Bone Health, second edition is a necessary resource for health care professionals, medical students, graduate students, dietitians, and nutritionists who are interested in how nutrition affects bone health during all stages of life.

This newly revised edition contains updated versions of all of the topics that were in the first edition and has been substantially expanded with an additional 5 chapters. Each chapter includes information from the most up-to-date research on how nutritional factors can affect bone health, written with an evidence-based focus and complete with comprehensive references for each subject. Nutrition and Bone Health, second edition covers all aspects of nutrition and the skeleton, from the history and fundamentals, to the effects of macronutrients, minerals, vitamins, and supplements, and even covers the effects of lifestyle, the different life stages, and nutrition-related disorders and secondary osteoporosis. New chapters include HIV & AIDs and the skeleton, celiac disease and bone health, and nutrition and bone health in space. Nutrition and Bone Health, second edition is a necessary resource for health care professionals, medical students, graduate students, dietitians, and nutritionists who are interested in how nutrition affects bone health during all stages of life.

In Vitamin D: Physiology, Molecular Biology, and Clinical Applications, Second Edition, leading researchers provide a comprehensive, highly readable overview of the biological functions and clinical applications of vitamin D and its metabolites.