RDA of vitamin

An elegant approach using three bacterial genes overexpressed in Desiree achieved a 20-fold increase in total carotenoids to 114 p-g/G DW and a 3600-fold increase in B-carotene to 47 pg/g DW (Diretto et al., 2007). A 250 g serving of these potatoes was estimated to provide 50% of the RDA of vitamin A. Potatoes engineered to have higher zeaxanthin levels were fed to human subjects and the zeaxanthin was found to be readily bioavailable (Bub et al., 2008). 

Multivitamin + Minerals Tablets with Beta Carotene (2 RDA of Vitamins) page 2... 

Vitamin B Complex + Vitamin C Instant Granules (2 RDA of Vitamins) 5. Chemical stability of the granules (20-25 °C)... 

Many vegetables and fruits, other than citrus, contain ascorbic acid. It was estimated that citrus fruits and tomatoes provided only 18% of the total vitamin C intake in the American diet during the decade of 1910. These two fruits supplied 41% of vitamin C in 1956-58 (6j. Today orange juice alone provides nearly 60% of the U.S. Recommended Daily Allowance (U.S. RDA) of vitamin C in the American diet (7). 

Vitamin E directly scavenges most of the RS and may also upregulate antioxidant enzymes (20), reduces platelet aggregation and adhesion (21,22), and decreases smooth cell proliferation (23), It is considered as the most classical chain breaker antioxidant, The RDA of vitamin E is 10 mg/day,... 

Vitamin A levels are frequently expressed in International Units (IU), although this unit is officially no longer accepted. One IU equals 0.344 pg of crystalline vitamin A acetate, or 0.300 pg vitamin A alcohol, or 0.600 pg P-carotene. The recommended daily allowance (RDA) of vitamin A of the National Research Council Food and Nutrition Board is 5000 IU for an adult. Other sources quote the human requirement at about 1 pg/day. Conditions of rapid growth, pregnancy, or lactation increase the need for vitamin A. 

For several years the recommended dietary allowance (RDA) of vitamin C has varied from country to country. It was recently increased from 45 to 60 mg/d in the United States (J). Probably, healthy people in their active ages normally ingest this and even larger amounts through their dietary habits, whereas elderly people, diseased people, or people under special circumstances like alcoholics may be at an actual risk and need supplementation to meet the basal needs for the vitamin. 

Compare your results with other class members. Were your results consistent Make a record of the foods you eat for two days. Does your diet contain the minimum RDA of vitamin C ... 

---