NUTR SCI 132 Lecture Notes - Lecture 26: Female Athlete Triad, Hip Fracture, Osteocalcin
4 Apr 2016
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Vitamin d: needed for calcium absorption, precursor is synthesized in the skin from cholesterol using ultraviolet light, activated by the kidney, acts on mucosa, deficiency: can"t absorb calcium. Rickets in children, bones aren"t right shape. Osteomalacia bones are right shape but they are not mineralized right and are very weak: toxicity: calcium over absorbed. Calcium deposited in kidneys and soft tissue >bad. Vitamin k: needed for blood to clot properly, involved in production of osteocalcin. Indirectly involved in bone metabolism: low vitamin k intake >higher bone fractures. Magnesium: most body"s magnesium is in bone. Monday, april 4, y: bone is magnesium reservoir, doesn"t make it stronger, when our body needs it we break bone down. Other factors in strong bones: exercise. Female athlete triad: low body fat >less estrogen, high levels of exercise, low fat diet, eating disorder sports where body image is important. Osteoporosis: hip fractures, quality of life.
