NTDT200 Lecture Notes - Lecture 14: B Vitamins, Rickets, Nutrient
5 Apr 2018
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Has rickets: bone malformation and muscle weakness. Treated with tenfold the normal dose of vitamin d supplementation. Bioavailability: degree to which nutrients can be absorbed and used by the body. Solubility: determinant of absorption and transportation process, a ects where they are stored and risk for toxicity, fat-soluble. Water-soluble: b vitamins, choline, and vitamin c. Sunshine vitamin : made in skin, from cholesterol and uv light. Not enough sun exposure makes it essential to consume in diet. Sun exposure (face, arms, hands: 5-10 minutes, 2-3 times a week, 10-20 minutes with sunscreen. Factors that may limit sun exposure and vitamin d synthesis: dark skinned people. Melanin that darkens skin can interfere with body"s ability to make vitamin d. Latitude, season, time of day: arctic region, winter, lack of sunlight. Heavy cloud cover, smoke, smog: blocks uv rays of the sun. Infants exclusively breastfed without supplementation: breast milk not a rich source of vitamin d.
