beta-Carotene deficiency alone did not affect the respiratory membrane either before or after oxygen exposure. These results suggest that vitamin A may be an important nutrient in the protection against pulmonary oxygen toxicity.doi:10.1203/00006450-198801000-00017Nicole Cohen-Addad...
beta-carotenecarotenescarotenoidsfaecesratiosretinolvitamin A deficiencyvitamin deficienciesWIDE differences between the theoretically expected and experimentally obtained potencies of pure vitamin A as compared with β-carotene have led to a considerable amount of speculationon the possible manner of conversion...
Vitamin A deficiency through beta-carotene-dependent gene variants In addition, the research team of Dr. Lietz furnished the first indications that approximately 40 percent of all Europeans possess a gene variant that restricts the amount of beta-carotene their bodies can convert into vitamin A. Man...
“The older generations tend to eat more eggs, milk and liver which are naturally rich in vitamin A whereas the health-conscious youngsters on low-fat diets are relying heavily on the beta-carotene form of the nutrient.” The next step in the study is to assess whether the effect of theg...
1) Retinol, which is preformed vitamin A 2) Beta-carotene, which is a precursor to vitamin A, or more specifically retinol (i.e. beta-carotene must be converted by the body into vitamin A). (Image credit: Getty Images) Both retinol and beta-carotene are further processed in the body ...
A vitamin A and protein rich food, customary in Central Europe, seems to rule out any vitamin A deficiency both in hyper- and hypothyroidism. However, the beta-carotene values are significantly higher in hypothyroidism, while in hyperthyroidism they were lower. As intrahepatic zinc content plays ...
vitamin Aretinol, retinal, retinoic acid, beta-carotene (plant version)normal vision, integrity of epithelial cells (mucous membranes and skin), reproduction, embryonic development, growth, immune responseocular disturbances leading to blindness, growth retardation, dry skin, diarrhea, vulnerability to in...
Cystic fibrosis.Problems with the digestive system that occur with cystic fibrosis increase the risk of vitamin A deficiency. Macular degeneration.A vitamin mix including beta-carotene slows vision loss in people with macular degeneration. ...
Cystic fibrosis.Problems with the digestive system that occur with cystic fibrosis increase the risk of vitamin A deficiency. Macular degeneration.A vitamin mix including beta-carotene slows vision loss in people with macular degeneration. ...
beta-Carotene absorption and cleavage in rats is affected by the vitamin A concentration of the diet. (2000) Vitamin A deficiency reduces uptake of β-carotene by brush border membrane vesicles but does not alter intestinal retinyl ester hydrolase activity ... T Van Vliet,MF Van Vlissingen,F ...