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🍊 Vitamins · Strong evidence

Vitamin C

Immune · antioxidant · collagen · iron absorption. People take it for:

  • Immune system support
  • Collagen synthesis
  • Antioxidant protection
  • Iron absorption enhancement
  • Reduces cold duration
  • Skin brightening

Why it works

Vitamin C is a potent antioxidant and essential cofactor for collagen synthesis. One of the most well-studied vitamins with evidence for immune support, skin health, and reducing cold duration.

Your Today

Morning

Vitamin C (preview, not in your stack yet)preview

How to take Vitamin C

Best time to take

With meals — divide doses throughout the day for better absorption

Suggested dose

500–2000mg daily; higher doses split into multiple smaller doses

Side effects and risks

  • High doses (>2g) may cause loose stools or kidney stones in susceptible people
  • May interact with certain chemotherapy drugs
  • Buffered forms are gentler on stomach

Vitamin C interactions

  • Works withIron

    Vitamin C converts iron into a form the gut absorbs far more readily. Taking it with iron is a well-established way to improve uptake.

  • Works withVitamin E

    Vitamin C regenerates vitamin E after it has neutralised a free radical, so the two antioxidants work as a pair.

Related supplements

Medical disclaimer: Nothing on Stack Ritual constitutes medical advice. The information provided is for educational purposes only. Always consult your doctor or a qualified healthcare provider before beginning, changing, or stopping any vitamin, supplement, or wellness regimen.