While helping her 72-year-old grandmother put away groceries, Kristina notices several new…

 While helping her 72-year-old grandmother put away groceries, Kristina notices several new supplement bottles. One is a single-nutrient vitamin A supplement, which provides 3,333 μg/dose. Another is a special “Healthy Skin Formula,” which also contains vitamin A, at 1,500 μg/dose. The third is a multivitamin– multimineral supplement that provides 2,200 μg of vitamin A/dose. When Kristina asks about these new products, her grandmother explains that she read something online that said vitamin A made your skin look younger. So, her grandmother takes each of the three supplements every day to make her wrinkles go away faster! If Kristina’s grandmother takes one dose of each of the three supplements per day, what percentage of the RDA does she consume? Of the UL? Do you see any potential problems with this level of intake?

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