Summary Nutrition Final Exam Study Guide|NUT111B FINAL STUDY GUIDE

Nutrition Final Exam Study Guide .......Information is insufficient to establish an RDA for infants o AI is based on the amount of Vit. A consumed by healthy babies fed breast milk ADULTS ● Not all precursors are absorbed in the same amounts ● RDA: evidence is based on adequacy of LIVER stores. ○ Vitamin A is specifically stored in the liver until it is needed in other parts of the body. ○ Measured by plasma retinol levels in the blood. Know the hazards of excess vitamin A. ● Acute toxicity ○ Nausea, vomiting, headache, increased cerebrospinal fluid pressure, vertigo, blurred vision ● Hypervitaminosis A ○ Usually caused by excessive intake of Vitamin A supplements > UL ○ Symptoms: anorexia, liver abnormalities, headache, anemia, blurred vision, teratogenicity ● Hypercarotenosis ○ Symptoms: Yellow/orange discoloration of the skin  Know the differences between vitamin A and carotenoids.....