How many servings of vitamin A should you have a day?
Table: RDAs and ULs for Vitamins and Minerals
| Vitamin or Mineral | Recommended Dietary Allowance (RDA) or Adequate Intake (AI) Nutrients with AIs are marked with an (*) |
|---|---|
| Vanadium | Not determined |
| Vitamin A | Men: 900 mcg/day Women: 700 mcg/day |
| Vitamin B3 (Niacin) | Men: 16 mg/day Women: 14 mg/day |
Do you need vitamin A every day?
The recommended daily allowance (RDA) for vitamin A is 900 mcg and 700 mcg per day for men and women, respectively — which can be easily reached by following a whole-foods diet ( 27 ). However, it’s important not to exceed the tolerable upper limit (UL) of 10,000 IU (3,000 mcg) for adults to prevent toxicity ( 27 ).
What should we eat to get daily vitamin A?
The top food sources of vitamin A in the U.S. diet include dairy products, liver, fish, and fortified cereals; the top sources of provitamin A include carrots, broccoli, cantaloupe, and squash [4,5].
Can too much vitamin A be harmful?
Yes, high intakes of some forms of vitamin A can be harmful. Getting too much preformed vitamin A (usually from supplements or certain medicines) can cause dizziness, nausea, headaches, coma, and even death. High intakes of preformed vitamin A in pregnant women can also cause birth defects in their babies.
Is vitamin A 5000 IU too much?
How much vitamin A is enough? Until 2001, the dietary reference intake for adult men was 5,000 international units (IU) a day, or 1,500 micrograms (mcg). Levels of up to 10,000 IU (3,000 mcg) have been considered safe.
Can I take vitamin A capsules daily?
The maximum daily dose relates to only pre-formed vitamin A. Pre-formed vitamin A is possibly unsafe when taken in doses greater than 10,000 units (3,000 mcg) daily. Higher doses might increase the risk of side effects. Long-term use of large amounts might cause serious side effects including mental changes.
Can I take multivitamins and vitamin C together?
No interactions were found between multivitamin and Vitamin C. This does not necessarily mean no interactions exist. Always consult your healthcare provider.
Which vegetable has the most vitamin A?
Spinach is known as a nutrient powerhouse for a reason. A single half-cup serving of spinach contains more than 570 mcg of vitamin A. Whether you’re eating it raw, in a smoothie, or cooked into a dish, spinach is a great way to get fiber and vitamin A at the same time.