Vitamin A (Retinol) Information - For Better Eyesight

Approximately 80% of vitamin A is absorbed in the human system. It is passed along with fat through the lymphatic system into the bloodstream. The absorption of vitamin A increases if it is taken with fats. Absorption is more rapid in men than in women. The absorption of this vitamin is poor in cases of diarrhoea, jaundice, and abdominal disorders. Vitamin A is stored in the liver. A healthy person can store about 97.2 mcg of vitamin A per g of liver. Thus an average liver weighing 1500 g can store 150,000 mcg of vitamin A.

Approxiately 20% of vitamin A which is not absorbed is excreted within one or two days into the faeces. Of the 80% absorbed, about 20% to 50% either combines with or burns down into products that are excreted within about one week in the faeces or urine. The remainder 30% to 60% of the absorbed vitamin A is stored.

Recommended Daily Allowance - Vitamin A
Men 600 mcg
Women 600 mcg
Children 600 mcg
Infants 350 mcg
Lactating Women 950 mcg

More on Vitamin A
Vitamin A Benefits
Vitamin A Deficiency Symptoms
Vitamin A Sources

Leave your comments

Health News

Surgeon Removes Eight Pound Liver Tumor

The cancerous tumor in Marcus Muhich's liver weighed 8 pounds and was nearly a foot across. Doctors at three major academic medical centers in the Midwest told Muhich his high-grade tumor was inoperable. Then he was referred to Dr... [ read article ]

NIPPV Linked To Increased Hospital Mortality Rates In Small Group Of Patients

Although increased use of noninvasive positive-pressure ventilation (NIPPV) nationwide has helped decrease mortality rates among patients hospitalized with chronic obstructive pulmonary disease (COPD), a small group of... [ read article ]

FDA Approves Label Update For PREZISTA® To Include 192-Week Data In HIV-1-Infected Adult Patients

Starting Treatment Janssen Therapeutics, Division of Janssen Products, LP, announced that the U.S. Food and Drug Administration (FDA) has approved a label update for PREZISTA® (darunavir) tablets to include 192-week data from the ARTEMIS study... [ read article ]

Recommended Stuff

Our Latest Blog Entries...