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  1. Beta-carotene blood test 
    https://medlineplus.gov/ency/article/003571.htm
    Carotene test ... asked not to eat anything with vitamin A (carotene) for 48 hours before the test. Your provider ... Beta-carotene is found in certain foods. It breaks down to become vitamin A in the body. Your provider ...
  2. Beta-Carotene 
    https://medlineplus.gov/druginfo/natural/999.html
    Beta-carotene belongs to a group of colored pigments called carotenoids. It's converted to vitamin A in the body and found in many fruits and vegetables. Beta-carotene and other red, orange, and yellow pigments called ...
  3. Vitamin A 
    https://medlineplus.gov/ency/article/002400.htm
    Retinol; Retinal; Retinoic acid; Carotenoids ... whole milk, and some fortified foods. Provitamin A carotenoids: Carotenoids are plant pigments (dyes). Once ingested, the ...
  4. Lung Cancer Prevention (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK66017
    ... With an Increased Risk of Lung Cancer Beta-carotene supplementation in current smokers Based on solid evidence, ... Do Not Decrease Risk of Lung Cancer Beta-carotene in nonsmokers Based on solid evidence, nonsmokers who ...
  5. Vitamin A 
    https://ods.od.nih.gov/factsheets/VitaminA-Consumer
    ... Vitamin A > Vitamin A - Consumer Vitamin A and Carotenoids Fact Sheet for Consumers Have a question? Ask ... professional fact sheet . What are vitamin A and carotenoids and what do they do? Vitamin A is ...
  6. Lung Cancer Prevention (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK66063
    ... pollution increases the risk of lung cancer. Beta carotene supplements in heavy smokers Taking beta carotene supplements ( ... not decrease the risk of lung cancer: Beta carotene supplements in nonsmokers Studies of nonsmokers show that ...
  7. List of Observational Cohorts and the Screened Publications - Concordance Between the Findings of Epidemiological ... 
    https://www.ncbi.nlm.nih.gov/books/NBK138251
    ... 221–5. [ PubMed : 9521437 ] The Alpha-Tocopherol, Beta-Carotene Cancer Prevention Study Albanes D, Heinonen OP, Huttunen ...
  8. Skin Cancer Prevention (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK66059
    ... the controlled-trial environment.[ 18 ] Chemopreventive agents Beta carotene In the Physicians’ Health Study, 21,884 male ... take 50 mg doses of daily oral beta carotene versus placebo in a 2 × 2 factorial trial ...
  9. Clinical Summaries of Recommendations for Adults - The Guide to Clinical Preventive Services 2014 - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK235852
    ... nutrient supplements: No recommendation. Grade: I statement β-carotene or vitamin E: Do not recommend. Grade: D ... vitamins, minerals, or functional pairs. Supplementation with β-carotene or vitamin E does not reduce the risk ...
  10. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 155 Aurodox D02.455.326.271.665.202 Carotenoids D02.455.326.271.665.202.061 Abscisic ... D02.455.326.271.665.202.123 beta Carotene D02.455.326.271.665.202.216 Lycopene ...
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