Indicative of cystic fibrosis. An abnormal test is most likely due to CF. To be able to accurately interpret sweat test results, an appropriate volume of sweat must be obtained. Acceptable volumes of sweat are 75 mg for the Gibson-Cooke procedure and 15 ÂµL for the MacroductÂ® procedure.
Beta-carotene is a pigment found in plants that gives them their color. The name beta-carotene is derived from the Latin name for carrot. It gives yellow and orange fruits and vegetables their rich hues. Beta-carotene is also used to color foods such as margarine.In the body, beta-carotene converts into vitamin A (retinol). We need vitamin A for good vision and eye health, for a strong immune system, and for healthy skin and mucous membranes.Taking big doses of vitamin A can be toxic, but your body only converts as much vitamin A from beta-carotene as it needs.eta-carotene is a pigment found in plants that gives them their color. The name beta-carotene is derived from the Latin name for carrot. It gives yellow and orange fruits and vegetables their rich hues. Beta-carotene is also used to color foods such as margarine.
Taking beta-carotene, selenium, vitamin C, and vitamin E together might decrease the effectiveness of some medications used for lowering cholesterol. It is not known if beta-carotene alone decreases the effectiveness of some medications used for lowering cholesterol. Cancer. 2  Beta-carotene does not seem to prevent or decrease death from uterine cancer, cervical cancer, thyroid cancer, bladder cancer, skin cancers (melanoma, basal cell carcinoma, squamous cell carcinoma), brain cancer, and blood cancer (leukemia).