Skip to main content
GutCited

Vitamin A
Vitamin A

vitamin

別名: Retinol, Retinyl Palmitate, Beta-Carotene (provitamin A), Retinoic Acid

<\/script>\n
`; }, get iframeSnippet() { const domain = 'gutcited.com'; const params = 'ingredient\u003Dvitamin\u002Da'; return ``; }, get activeSnippet() { return this.method === 'script' ? this.scriptSnippet : this.iframeSnippet; }, copySnippet() { navigator.clipboard.writeText(this.activeSnippet).then(() => { this.copied = true; setTimeout(() => { this.copied = false; }, 2000); }); } }" @keydown.escape.window="open = false" @click.outside="open = false">

Embed This Widget

Style



      
      
    

Widget powered by . Free, no account required.

About

Vitamin A plays a critical role in maintaining intestinal epithelial cell differentiation and turnover through retinoic acid signaling. It supports goblet cell mucus production, which forms a key component of the intestinal barrier, and is required for secretory IgA transport across mucosal surfaces. Research suggests vitamin A supplementation may help support intestinal barrier integrity and immune defense, particularly in deficient populations.

How It Works

Maintains intestinal epithelial cell differentiation and turnover via retinoic acid signaling through RAR/RXR nuclear receptors; supports goblet cell mucus production forming the protective mucus layer; required for secretory IgA transport across mucosal surfaces; modulates Th17/Treg balance in gut-associated lymphoid tissue (GALT).

Evidence For Conditions

Side Effects

  • Hepatotoxicity at chronic high doses of preformed vitamin A
  • Birth defects (teratogenic at high doses during pregnancy — avoid >3,000 mcg RAE/day)
  • Nausea, headache, and dizziness
  • Bone density reduction with long-term excess

Drug & Supplement Interactions

  • Retinoid medications (isotretinoin, tretinoin — additive toxicity risk)
  • Orlistat (reduces absorption of fat-soluble vitamins)
  • Alcohol (increases hepatotoxicity risk of vitamin A)
  • Tetracycline antibiotics (increased risk of intracranial pressure)

服用しているすべてのサプリメントについて、必ず医療提供者にお知らせください。摂取しているすべてのサプリメントについて、必ず医療専門家にお知らせください。

Related Ingredients

FDAに関する免責事項: これらの記述は米国食品医薬品局(FDA)による評価を受けていません。本ウェブサイトの製品および情報は、疾病の診断、治療、治癒、または予防を目的としたものではありません。表示されているエビデンスグレードは、公開された査読済み研究の分析に基づいており、医療上の助言を構成するものではありません。サプリメントの摂取を開始する前に、必ず医療専門家にご相談ください。