Vitamin A - Mayo Clinic
Vitamin A (retinol, retinoic acid) is a nutrient important to vision, growth, cell division, reproduction and immunity. Vitamin A also has antioxidant properties. Antioxidants are substances that might protect your cells against the effects of free radicals — molecules produced when your body breaks down food or is exposed … 展开
Research on oral vitamin A for specific conditions shows: 1. Acne.Large doses of oral vitamin A supplements don't appear to affect acne. 2. Age-related macular degeneration.A large … 展开
Possible interactions include: 1. Anticoagulants.Oral use of vitamin A supplements while taking these medications used to … 展开
Too much vitamin A can be harmful. Even a single large dose — over 200,000 mcg — can cause: 1. Nausea 2. Vomiting 3. Vertigo 4. Blurry vision Taking more than 3,000 mcg a day of oral vitamin A supplements long term can cause: 1. Bone thinning 2. Liver damage … 展开
Vitamin A: What It Is and How Much You Need - Cleveland Clinic …
- Maintains healthy vision. One of vitamin A’s most important roles is to …
- Aids immune system function. Vitamin A strengthens your immune system by …
- Reduces your cancer risk. Vitamin A plays a key role in the healthy growth …
- Keeps your skin clear. Many people claim vitamin A is an effective treatment …
- Supports reproductive health. Adequate amounts of vitamin A in your diet are …
Vitamin A Dosage Guide + Max Dose, Adjustments - Drugs.com
2024年4月11日 · Detailed Vitamin A dosage information for adults and children. Includes dosages for Vitamin/Mineral Supplementation and Vitamin A Deficiency; plus renal, liver and …
Vitamin A: Benefits, Deficiency, Toxicity, and More - Healthline
The Recommended Dietary Allowance (RDA) for vitamin A is 900 mcg and 700 mcg per day for men and women, respectively. This intake level is easy to reach if you consume plenty of …
Vitamin A and Carotenoids - Health Professional Fact Sheet
Recommended doses are 30,000 mcg RAE (100,000 IU) of vitamin A once for infants age 6–11 months and 60,000 mcg RAE (200,000 IU) every 4–6 months for age 1–5 years. In 2013, …
Vitamin a (oral route, intramuscular route) - Mayo Clinic
2024年2月1日 · Normal daily recommended intakes in the United States for vitamin A are generally defined according to age or condition and to the form of vitamin A as follows: Age or …
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Vitamin A and Carotenoids - Consumer - Office of Dietary …
The amount of vitamin A you need depends on your age and sex. Average daily recommended amounts of preformed vitamin A and provitamin A carotenoids are listed below in micrograms …
Vitamin A supplementation - World Health Organization (WHO)
Vitamin A is safe in the recommended doses listed below (see Table 1). Table 1: Target groups, dosage, immunization contacts and route of administration for prevention of vitamin A …
Vitamin A - The Nutrition Source
The tolerable upper intake of 3,000 mcg of preformed vitamin A, more than three times the current recommended daily level, is thought to be safe. However, there is some evidence that this much preformed vitamin A might increase the risk …
Vitamin A supplements: a guide to their use in the treatment of vitamin ...
1997年6月16日 · Provides concise, authoritative advice on the use of high-dose vitamin A supplements for the control of vitamin A deficiency and the emergency treatment of xerophthalmia and other conditions in high-risk groups.
