Край брега ме закачи, морски дар ми подари. ~бебеправене 420~

Това е малко информация от същия източник относно това от къде идва объркването за Витамин А.

VITAMIN A FOR PREGNANCY

You definitely want to have plenty of vita­min A during pregnancy! Unfortunately, most health practitioners are afraid of vitamin A during pregnancy. This fear is based on a 1995 study by Rothman and others, which suggested that over 10,000 IU of vitamin A daily in the first eight weeks of pregnancy increases risk of neural crest defects. All seven cases involved intakes of over 10,000 IU from supplements, not from food, with an average intake of 21,000 IU.20 Chris Masterjohn21 and Mary G. Enig22 have written about the flaws in the Rothman study and noted other studies that indicate that ad­equate levels of vitamin A during pregnancy result in fewer birth defects. But the Rothman study set the stage for the current fear of vitamin A for pregnant women, and it has resulted in practitioners saying that pregnant women should get no preformed vitamin A at all—and this in the teeth of all we are learning about the need for vitamin A for normal fetal development. For this unfounded reason, almost all prenatal vitamins contain only beta-carotene, not retinol.

Are pregnant women in danger of getting too much vitamin A or too little? A recent study showed that one-tenth of women at delivery in Nebraska were frankly deficient in vitamin A. That to me is significant. In Brazil, the number was one-fifth, so the U.S. is not that different from a Third World country.23 If you look at the numbers, vitamin A status of our mothers is not much better than in Nigeria. We have 73 percent of infants, born deficient. It isn’t abnormal to have low vitamin A in infants but if you look at the mothers, 10 percent of them were deficient in vitamin A at birth, and 41 percent were in­sufficient, so 50 percent had less than sufficient amounts in their bodies at birth.