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  1. Lip and Oral Cavity Cancer Treatment (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK65821
    ... benefit of retinyl palmitate or retinyl palmitate plus beta-carotene when compared with isotretinoin alone.[ 16 ][ Level of ... acid compared with retinyl palmitate with or without beta-carotene in oral premalignancy. J Clin Oncol 27 (4): ...
  2. Genetics of Skin Cancer (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK65895
    ... Stukel TA, et al.: A clinical trial of beta carotene to prevent basal-cell and squamous-cell cancers ... Stukel TA, et al.: A clinical trial of beta carotene to prevent basal-cell and squamous-cell cancers ...
  3. Esophageal Cancer Prevention (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK65955
    ... of nutrients, such as retinol, riboflavin, alpha-carotene, beta-carotene, alpha-tocopherol, ascorbate and zinc, and with exposure ... months of treatment. Serum levels of vitamin A, beta-carotene, riboflavin, and zinc were obtained at 0, 2, ...
  4. Prostate Cancer Prevention (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK65968
    ... Mettlin C, Selenskas S, Natarajan N, et al.: Beta-carotene and animal fats and their relationship to prostate ... Hawaii: a reevaluation of the effect of dietary beta-carotene. Am J Epidemiol 133 (3): 215-9, 1991. [ ...
  5. pdfNLM Technical Bulletin, July-August 1996 
    https://www.nlm.nih.gov/...m_technical_bulletin_july_august_1996.pdf
    ... RM In vivo biosynthesis of retinoic acid from beta-carotene involves and excentric cleavage pathway in ferret intestine [ ... acid can be produced by excentric cleavage of beta-carotene in vivo. By using an inhibitor of retinaldehyde ...
  6. Vitamin A 
    https://medlineplus.gov/vitamina.html
    ... of Health, Office of Dietary Supplements Patient Handouts Beta-carotene blood test (Medical Encyclopedia) Also in Spanish Hypervitaminosis ... Encyclopedia) Also in Spanish Topic Image MEDICAL ENCYCLOPEDIA Beta-carotene blood test Hypervitaminosis A Vitamin A Vitamin A ...
  7. Antioxidants 
    https://medlineplus.gov/antioxidants.html
    ... available as dietary supplements. Examples of antioxidants include: Beta-carotene Lutein Lycopene Selenium Vitamin A Vitamin C Vitamin ... in some cases. For example, high doses of beta-carotene may increase the risk of lung cancer in ...
  8. References for included and cited studies - Age-related macular degeneration - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK536461
    ... high-dose supplementation with vitamins C and E, beta carotene, and zinc for age-related macular degeneration and ... 1238 [ PubMed : 25152500 ] Department of Health (2015) NHS reference costs 2014 to 2015 Department of Health (2016) ...
  9. Screening for Impaired Visual Acuity in Older Adults: A Systematic Review for the U.S. Preventive Services Task Force - ... 
    https://www.ncbi.nlm.nih.gov/books/NBK580929
    ... AREDS 2 trial found the AREDS formulation with beta carotene was associated with increased risk of lung cancer compared with the AREDS formulation without beta carotene when current smokers were excluded from the analysis ( ...
  10. Coenzyme Q10 (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK65890
    ... received antioxidant supplementation ( vitamin C , vitamin E, and beta carotene ), other vitamins and trace minerals , essential fatty acids , ... General information about clinical trials is also available. References Ambrosone CB, Zirpoli GR, Hutson AD, et al.: ...
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