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  1. Lung Cancer Prevention (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK66017
    ... of randomized controlled trials to confirm epidemiological studies. References The effect of vitamin E and beta carotene on the incidence of lung cancer and other ...
  2. Vitamin A 
    https://medlineplus.gov/ency/article/002400.htm
    ... to normal once you reduce your intake of beta-carotene.
  3. Skin Cancer Prevention (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK66059
    ... damage. Oral retinoids are hepatotoxic and cause hypertriglyceridemia. Beta carotene is associated in RCTs with ... Weinstock MA, Thwin SS, Siegel JA, et al.: ...
  4. Hypervitaminosis A 
    https://medlineplus.gov/ency/article/000350.htm
    ... one source. Some people take vitamin A and beta carotene supplements in the belief it will help prevent cancer. This may lead to chronic hypervitaminosis A if people take more than is recommended.
  5. Workgroup Exercise - Issues and Challenges in Conducting Systematic Reviews to Support Development of Nutrient ... 
    https://www.ncbi.nlm.nih.gov/books/NBK44080
    ... Evidence Map for Key Questions on Vitamin A Reference Values The aim of the ... beta-carotene and the risk of morbidity and mortality, xerophthalmia, ...
  6. Results - Vitamin, Mineral, and Multivitamin Supplementation for the Primary Prevention of Cardiovascular Disease and ... 
    https://www.ncbi.nlm.nih.gov/books/NBK581647
    ... vitamin C), and minerals (calcium, selenium, zinc, magnesium). Beta-Carotene and Vitamin A We discuss beta-carotene and ... the body into vitamin A. Summary of Results Beta-Carotene Seven studies of beta-carotene supplementation with or ...
  7. Literature Search Strategies for Primary Literature - Vitamin, Mineral, and Multivitamin Supplementation for the ... 
    https://www.ncbi.nlm.nih.gov/books/NBK581649
    ... ti,ab. Vitamin A/ Vitamin A.ti,ab. beta carotene/ (beta carotene or Betacarotene).ti,ab. Retinol.ti,ab. retinoids/ ... OR Dehydroascorbate[tiab] OR Vitamin A[tiab] OR beta carotene[tiab] OR Betacarotene[tiab] OR Retinol[tiab] OR ...
  8. Prostate Cancer, Nutrition, and Dietary Supplements (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK83261
    ... weight or 16 mg/kg body weight) or beta-carotene (16 mg/kg body weight). Supplementing mice with lycopene or beta-carotene resulted in decreased tumor growth.[ 19 ] In an ...
  9. Stomach (Gastric) Cancer Prevention (PDQ®) - PDQ Cancer Information Summaries - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK65822
    ... been calculated and indicate possible protective effects of beta carotene, vitamin A, vitamin E, selenium, vitamin C, or ... the gastric cancer mortality rate after supplementation with beta carotene, vitamin E, and selenium.[ 4 ] The population studied, ...
  10. Results - Screening for Impaired Visual Acuity in Older Adults: A Systematic Review for the U.S. Preventive Services ... 
    https://www.ncbi.nlm.nih.gov/books/NBK580934
    ... C 500 mg, vitamin E 400 IU, and beta carotene 15 mg), zinc (zinc oxide 80 mg and ... formulation or a variation of it (elimination of beta carotene, lowering of zinc dose, or both). Therefore, although ...
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