The beta-carotene in so-called "Golden Rice" converts to vitamin A in humans, according to researchers at Baylor College of Medicine and Tufts University in an article that appears in the current issue of the American Journal of Clinical Nutrition.

Vitamin A is an essential nutrient involved in vision, growth, cellular differentiation, and immune function. Because vitamin A is fat-soluble, it is chaperoned through the body on carrier proteins.

Chemists have traded their white coats for swim shorts at the University of Hawaii, Honolulu - they've shunned the lab so they can swim out to the breakers with a test-tube built into a boogie-board.

Researchers at Georgetown University Medical Center have discovered that vitamin A, when applied to breast cancer cells, turns on genes that can push stem cells embedded in a tumor to morph into endothelial cells. These cells can then build blood vessels to link up to the body's blood supply, promoting further tumor growth.

A single, oral dose of vitamin A, given to infants shortly after birth in the developing world can reduce their risk of death by 15 percent, according to a study conducted by researchers at the Johns Hopkins Bloomberg School of Public Health. The study is published in the July 2008 edition of the journal Pediatrics.

A team of plant geneticists and crop scientists has pioneered an economical approach to the selective breeding of maize that can boost levels of provitamin A, the precursors that are converted to vitamin A upon consumption. This innovation could help to enhance the nutritional status of millions of people in the developing world.

Scientists have developed a potentially powerful new tool in the fight against deficiencies in dietary vitamin A, which cause eye diseases, including blindness, in 40 million children annually, and increased health risks for about 250 million people, mostly in developing countries.

Treatment with a derivative of vitamin A called retinoic acid was associated with reduced lung cell growth in a group of former heavy smokers, according to a study published online October 30 in the Journal of the National Cancer Institute.

Despite a mandatory program designed to prevent pregnant women from being exposed to the anti-acne medication Accutane and similar medications containing isotretinoin (a known teratogen or birth defect-causing agent), 122 pregnancies were exposed during the first year of the program, known as iPledge, a report revealed.

African-American adolescent and teenage girls consume less vitamin A and D, calcium and magnesium compared to Caucasian girls, according to researchers at St. Joseph College, Wesleyan University and other institutions.

Applying vitamin A to the skin appears to improve the wrinkles associated with natural skin aging and may help to promote the production of skin-building compounds, according to a report in the May issue of Archives of Dermatology, one of the JAMA/Archives journals.

A study of more than 75,000 adults found that taking supplemental multivitamins, vitamin C and E and folate do not decrease the risk of lung cancer. The findings are being reported at the American Thoracic Society 2007 International Conference, on Monday, May 21.