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  1. Usher Syndrome Type II - GeneReviews® - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK1341
    ... A, Weigel-DiFranco C, Rosner B, Berson EL. Safety of <7500 RE (<25000 IU) vitamin A daily in adults with retinitis pigmentosa. Am J ...
  2. Nonsyndromic Retinitis Pigmentosa Overview - GeneReviews® - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK1417
    ... A, Weigel-DiFranco C, Rosner B, Berson EL. Safety of <7500 RE (<25000 IU) vitamin A daily in adults with retinitis pigmentosa. Am J ...
  3. Usher Syndrome Type I - GeneReviews® - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK1265
    ... A, Weigel-DiFranco C, Rosner B, Berson EL. Safety of <7500 RE (<25000 IU) vitamin A daily in adults with retinitis pigmentosa. Am J ...
  4. Vision - night blindness 
    https://medlineplus.gov/ency/article/003039.htm
    ... Treatable causes: Cataracts Nearsightedness Use of certain medicines Vitamin A deficiency (rare) Nontreatable causes: Birth defects, particularly congenital stationary night blindness Retinitis pigmentosa
  5. Familial hypercholesterolaemia: identification and management - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK552672
    ... be informed by consideration of concomitant medication, comorbidities, safety and tolerability. [2008] 1.3.1.29. Healthcare professionals should consider offering fat-soluble vitamin (vitamins A, D and K) and folic acid supplementation for ...
  6. xmlvitaminsdefinitions.xml 
    https://medlineplus.gov/xml/vitaminsdefinitions.xml
    ... the testing that drugs do for effectiveness and safety.</definition></term-group><term-group ><term >>Fat-Soluble Vitamins</term><definition >>Fat-soluble vitamins include vitamins A, D, E, and K. The body stores fat- ...
  7. Definitions of Health Terms: Vitamins 
    https://medlineplus.gov/definitions/vitaminsdefinitions.html
    ... the testing that drugs do for effectiveness and safety. Source : National Institutes of Health, Office of Dietary Supplements Fat-Soluble Vitamins Fat-soluble vitamins include vitamins A, D, E, and K. The body stores fat- ...
  8. xmlmplus_topics_2025-06-06.xml 
    https://medlineplus.gov/xml/mplus_topics_2025-06-06.xml
    ... li><a href="https://medlineplus.gov/vitamins.html">Vitamins</a> and <a ... >Nutrition</related-topic><see- ...
  9. MedlinePlus Drug Information: Vitamin A 
    https://medlineplus.gov/druginfo/meds/a621028.html
    Vitamin A is used as a dietary supplement when the amount of vitamin A in the diet is not enough. People most at risk for vitamin A deficiency are those with a limited variety of ...
  10. Excluded Studies - Lipid Screening in Childhood for Detection of Multifactorial Dyslipidemia - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK379669
    ... Glueck CJ, Mellies MJ, Dine M, et al. Safety and efficacy of long-term diet and diet ... Tsang RC, Fallat RW, et al. Plasma vitamin A and E levels in children with familial type ...
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