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2. Vitamin A - Wikipedia

   en.wikipedia.org/wiki/Vitamin_A

   For U.S. food and dietary supplement labeling purposes, the amount in a serving is expressed as a percent of Daily Value (%DV). For vitamin A labeling purposes, 100% of the Daily Value was set at 5,000 IU, but it was revised to 900 μg RAE on 27 May 2016. [54] [55] A table of the old and new adult daily values is provided at Reference Daily Intake.

3. Hypervitaminosis A - Wikipedia

   en.wikipedia.org/wiki/Hypervitaminosis_A

   Hypervitaminosis A results from excessive intake of preformed vitamin A. Genetic variations in tolerance to vitamin A intake may occur, so the toxic dose will not be the same for everyone. [23] Children are particularly sensitive to vitamin A, with daily intakes of 1500 IU/kg body weight reportedly leading to toxicity. [21]

4. Dietary Reference Intake - Wikipedia

   en.wikipedia.org/wiki/Dietary_Reference_Intake

   Tolerable upper intake levels (UL), to caution against excessive intake of nutrients (like vitamin A and selenium) that can be harmful in large amounts. This is the highest level of sustained daily nutrient consumption that is considered to be safe for, and cause no side effects in, 97.5% of healthy individuals in each life stage and sex group ...

5. Reference Daily Intake - Wikipedia

   en.wikipedia.org/wiki/Reference_Daily_Intake

   The recommended adequate intake of sodium is 1,500 milligrams (3.9 g salt) per day, and people over 50 need even less." [13] The Daily Value for potassium, 4,700 mg per day, was based on a study of men who were given 14.6 g of sodium chloride per day and treated with potassium supplements until the frequency of salt sensitivity was reduced to 20%.

6. Retinol - Wikipedia

   en.wikipedia.org/wiki/Retinol

   The Recommended Daily Intake (RDA) for preformed supplemental vitamin A for adult men and women is 900 and 700 Retinol Activity Units(RAE)/day, respectively, or about 3,000 IU and 2,300 IU. [3] In pregnancy, the vitamin A RDA is 750–770 RAE/day (about 2,500–2,550 IU). [3]

7. Vitamin A deficiency - Wikipedia

   en.wikipedia.org/wiki/Vitamin_A_Deficiency

   Vegetarian and vegan diets can provide sufficient vitamin A in the form of provitamin A carotenoids if the diet contains carrots, carrot juice, sweet potatoes, green leafy vegetables such as spinach and kale, and other carotenoid-rich foods. In the U.S., the average daily intake of β-carotene is in the range 2–7 mg. [28]