# OnCo record vitamin-a-supplements (technology). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)". Whole corpus: https://onco.cc/api/v1/onco.nt
@prefix schema: <https://schema.org/> .
@prefix onco: <https://onco.cc/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://onco.cc/technologies/vitamin-a-supplements/>
  a schema:MedicalTherapy ;
  onco:kind "technology" ;
  schema:identifier "vitamin-a-supplements" ;
  schema:name "Vitamin A supplements"@en ;
  schema:alternateName "Retinol supplements"@en, "Retinyl palmitate"@en ;
  schema:description "Vitamin A from food matters, but supplements have not prevented lung cancer or lengthened survival in melanoma, and some studies link them to a higher risk of prostate cancer. Because it is stored in the body, high doses taken for months can damage the liver, and it must be avoided in pregnancy."@en ;
  schema:url <https://onco.cc/technologies/vitamin-a-supplements/> ;
  schema:dateModified "2026-11-04"^^xsd:date ;
  schema:citation <https://www.mskcc.org/cancer-care/integrative-medicine/herbs/vitamin> ;
  onco:status "phase-2" ;
  onco:tag "complementary", "supportive-care", "evidence:harm" ;
  onco:related <https://onco.cc/technologies/beta-carotene-supplements/>, <https://onco.cc/technologies/vitamin-e-supplements/> ;
  onco:sections <https://onco.cc/fronts/supportive-care/>, <https://onco.cc/fronts/nutrition-lifestyle/>, <https://onco.cc/fronts/prevention/> ;
  onco:technologies <https://onco.cc/technologies/integrative-oncology/>, <https://onco.cc/technologies/dietary-supplements-treatment-interactions/> ;
  onco:terms <https://onco.cc/terms/unproven-diet-claims/> ;
  onco:bottlenecks <https://onco.cc/bottlenecks/b-misinformation/>, <https://onco.cc/bottlenecks/b-toxicity-qol/> .