ESS 3 Lecture Notes - Lecture 20: Retinoid, Chylomicron, Scantron Corporation
29 Nov 2016
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Document Summary
Fat-soluble vitamins have diverse functions in the body but share common characteristics. Often present in fatty portion of foods. Vitamin a: vision and cell differentiation. Vitamin d: bone growth and maintenance, cell development, and immunity. Vitamin k: blood clotting and bone formation. Vitamin d can be produced in the skin from cholesterol and exposure to uv light. Insufficient sun exposure makes it essential to consume in diet. Must be activated in the kidneys and liver to function in the body. Vitamin d is considered a nutrient of concern in the dietary guidelines for americans. ~8% of americans at risk for vitamin d deficiency. Groups at risk: avoid vitamin-d fortified dairy foods, people with dark skin. Inadequate sun exposure: exclusively breast-fed infants, elderly. Vitamin a encompasses a group of fat-soluble compounds. Only retinoid is present in significant amounts in our diet: retinoic acid. Carotenoids: only has vitamin activity after conversion to active form in the body.
