People of all races can develop osteoporosis. The risk is greatest for white and Asian women, particularly older women who have passed menopause. Medications.
Increased intestinal calcium absorption is vitamin D's main contribution to calcium homeostasis. Both a passive paracellular pathway and an energy-dependent active transcellular pathway use tight junctions to absorb calcium.
The body receives around 9 calories per gram of fat, more than twice as many as it receives from proteins or carbohydrates. The body retains any excess energy because lipids are such a powerful source of energy.
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