The 9th International Symposium is the only regular meeting in the bone field to be exclusively devoted to nutrition, bone and muscle, and it allows the authors of this book to review the new scientific data, discuss new concepts, and update the knowledge on several nutrients.  The Symposium provides a unique opportunity to connect health professionals, researchers and industry across many disciplines, including nutrition and dietetics, exercise science, gerontology, nursing, general practice, academia and the food and fitness industry.  Most causes for osteoporosis, like genetics, age, menopause, and associated diseases with their treatments, are not modifiable. The investigation of the influence of nutrition on bone health is important as a key modifiable factor of the development of bone and the prevention of osteoporosis. It is the privilege of this symposium to gather every three years with scientists from all over the world working in this field.