4.1 Vitamins: Vital Dietary Components Part 3 Flashcards
What are sources of provitamin A carotenoids?
spinach
kale
yellow and orange fruits
What is the upper level for daily dose of vitamin A in adults?
3000 micrograms
What can occur as a result of vitamin A toxicity?
hip fractures
liver toxicity
fetal malformations
Which form of vitamin A does not have toxic effects?
provitamin A carotenoid
What is cartenodermia?
yellowing of the palms of hands and soles of feet as a result of excess consumption of provitamin A carotenoid
What is vitamin D also classified as?
hormone
What are the two forms of vitamin D?
- ergocalciferol D2 = synthetic
- cholecalciferol D3 = form made by human body
How can we naturally get our vitamin D?
ten minutes of sun two to three times per week
What are good dietary sources of vitamin D?
fatty fish
fortified cereal
eggs
butter
fortified milk
yogurt
What is the primary function of vitamin D?
regulation of calcium levels and bone metabolism
What are the functions of vitamin D and parathyroid hormone?
regulates absorption of calcium and phosphorus from the intestine and deposition of calcium in the bones
What are the secondary functions of vitamin D?
immune system, skin development, muscle health, and blood pressure control
What can result from vitamin D deficiency?
bone problems in both children and adults?
What is rickets?
poor mineralization of the bone due to inadequate calcium deposits in children; bow legs
What is osteomalcia?
inadequate calcium absorption and deposition in bones in adults
