This site has limited support for your browser. We recommend switching to Edge, Chrome, Safari, or Firefox.

What Does Vitamin C Do For the Body?

Vitamin C, also known as ascorbic acid, is a crucial nutrient that serves several important functions in the body:

  1. Antioxidant Protection: Vitamin C is a powerful antioxidant, protecting cells from damage caused by free radicals and oxidative stress.

  2. Collagen Synthesis: It is essential for the synthesis of collagen, a protein that helps maintain the integrity of skin, blood vessels, bones, and connective tissues.

  3. Immune Support: Vitamin C supports the immune system by enhancing the function of various immune cells, promoting the skin's barrier function against pathogens, and having antimicrobial and antioxidant activities.

  4. Iron Absorption: It enhances the absorption of non-heme iron (the type found in plant-based foods) from the digestive tract, which can help prevent iron deficiency anemia.

  5. Neurotransmitter Synthesis: Vitamin C is involved in the synthesis of neurotransmitters such as norepinephrine and serotonin, which are critical for brain function and mood regulation.

  6. Wound Healing: Due to its role in collagen synthesis, vitamin C is important for wound healing and tissue repair.

Effects of High Dosing on Vitamin C

While vitamin C is generally safe at recommended doses, very high doses can lead to various side effects and potential health issues:

  1. Gastrointestinal Disturbances: High doses (typically over 2,000 mg per day) can cause digestive disturbances such as diarrhea, nausea, stomach cramps, and flatulence.

  2. Kidney Stones: Excessive vitamin C can increase oxalate and uric acid levels in the urine, potentially leading to the formation of kidney stones, especially in susceptible individuals.

  3. Iron Overload: In people with conditions like hemochromatosis (a tendency to accumulate too much iron), high doses of vitamin C can exacerbate iron overload and cause tissue damage.

  4. Reduced Efficacy of Some Treatments: High doses of vitamin C might interfere with certain medications and treatments, particularly some forms of chemotherapy. It’s important to consult with a healthcare provider before combining high doses of vitamin C with other treatments.

  5. Pro-oxidant Effects: Although vitamin C is an antioxidant, in very high doses it may act as a pro-oxidant, potentially causing oxidative stress and cell damage.

Recommended Dosage

The Recommended Dietary Allowance (RDA) for vitamin C varies by age, sex, and life stage:

  • Men: 90 mg/day
  • Women: 75 mg/day
  • Pregnant Women: 85 mg/day
  • Breastfeeding Women: 120 mg/day

Smokers may need an additional 35 mg/day due to increased oxidative stress and metabolic turnover of vitamin C.


Vitamin C is vital for overall health, supporting immune function, collagen synthesis, and acting as a potent antioxidant.

However, while high doses of vitamin C are often promoted for various health benefits, they can lead to adverse effects, particularly gastrointestinal issues and an increased risk of kidney stones.

It’s generally advisable to meet vitamin C needs through a balanced diet rich in fruits and vegetables and to consult with healthcare providers before taking high-dose supplements. 

Mushroom Cloud gives you your full RDA of Vitamin C.

Join Our World.

Long reads, insights and special offers.



Congratulations! Your order qualifies for free shipping FREE SHIPPING ON ALL ORDERS
No more products available for purchase

Your Cart is Empty