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how long does it take for vitamin a to work

A 31-year-old member asked:
Dr. Evans Prieston
43 years experience Pharmacology
Vitamins: This is very difficult to answer because you do not specify what vitamin and what you need the vitamin to do for you. If you have a true vitamin defi ... Read More

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A 21-year-old male asked:
Dr. Randy Baker
39 years experience Holistic Medicine
Many months: There is widespread agreement that it takes many months for vit a to leave the body but little specific info on how long. One website says the half-li ... Read More
A 37-year-old member asked:
Dr. Ed Friedlander
43 years experience Pathology
What are you doing?: This is very dangerous. You can damage your brain trying this. If you have acne, and topical benzoyl peroxide hasn't cleared you in two weeks, your ph ... Read More
A 36-year-old member asked:
Dr. Thomas Riney
36 years experience Pediatrics
Fat soluble vits: Can last for months and too much can actually cause harm, one a day MVI (multivitamin) from walmart is all anyone needs.
A 45-year-old member asked:
Dr. Bruce Saran
32 years experience Ophthalmology
Depends: Acute toxicity occurs when adults take more than 20-100 times the rda ( recommended daily amount) of vitamin a over a period of hours or a few days. ... Read More
A 30-year-old member asked:
Dr. Jason Burke
24 years experience Anesthesiology
Depends on dose: It really depends on your age and the dose. Younger people will recover faster. Also, the higher the dose, the longer it will take to recover. Do n ... Read More
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A 19-year-old female asked:
Dr. Jan Lei Iwata
25 years experience Ophthalmology
It is equivalent to: 1/2 a cantaloupe. It's a fat soluble vitamin, so if no fats are being taken along side it, it isn't absorbed very well. You are safe.
A 39-year-old female asked:
Dr. Ed Friedlander
43 years experience Pathology
Probably fine: Epidemiology generates all kinds of junk data and I'd ignore studies that report, "Thus-and-so many people with more than thus-and-so daily had more / ... Read More
A 17-year-old male asked:
Dr. Marwan Hammoud
Specializes in Family Medicine
Vitamin A Toxicity: Vitamin A toxicity is very unlikely from an average diet. It is a fat-soluble vitamin and can become toxic in the body if taking too much as a supplem ... Read More
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A 18-year-old male asked:
Dr. Julie Abbott
44 years experience Preventive Medicine
No: Zinc and vitamin A are often taken at the same time as they both seem to have some beneficial effects on the skin. But I could find no evidence that ... Read More
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