Dr.pharmacist
California Gold Nutrition (CGN) Vitamin C
Pharmacist Safety Review

Is California Gold Nutrition (CGN) Vitamin C Safe?

Reviewed by Younghun ChoLast reviewed April 20, 2026

Generally yes, California Gold Nutrition Vitamin C is safe for most healthy adults when taken within recommended dosages. It's an essential nutrient, and deficiencies are common, but consistently very high doses can lead to side effects.

Who Should Avoid or Consult First

  • People with a history of kidney stones or kidney disease
  • Individuals with hemochromatosis or other iron overload disorders
  • People undergoing chemotherapy or radiation therapy
  • Pregnant or breastfeeding women should consult a doctor before taking high doses

Common Side Effects

  • Diarrhea — especially with doses above 2000 mg/day
  • Nausea
  • Abdominal cramps
  • Heartburn

Interactions to Watch For

Blood thinners (e.g., Warfarin)

High doses of vitamin C might interfere with the effectiveness of blood thinners, potentially increasing bleeding risk, though evidence is inconsistent.

Antacids containing aluminum

Vitamin C can increase the absorption of aluminum, which can be harmful to people with kidney problems.

Chemotherapy drugs

High doses of vitamin C might interfere with the effectiveness of some chemotherapy drugs; consult your oncologist.

People Also Ask

Can I take Vitamin C every day?

Yes, it is generally safe to take Vitamin C daily, especially within the recommended daily allowance (90 mg for adult men, 75 mg for adult women) or slightly above. Your body uses what it needs and excretes the rest, but consistently very high doses (above 2000 mg) can lead to digestive upset.

What happens if I take too much Vitamin C?

Taking too much Vitamin C, especially doses exceeding 2000 mg daily, commonly leads to digestive issues like diarrhea, nausea, and stomach cramps. While serious overdose is rare because it's water-soluble, extremely high doses over time could potentially contribute to kidney stone formation in susceptible individuals.

Is Vitamin C safe during pregnancy?

Vitamin C is essential during pregnancy, and typical dietary intake or standard prenatal vitamins provide sufficient amounts. However, taking high-dose Vitamin C supplements beyond recommended levels during pregnancy should only be done under a doctor's guidance, as excessive intake has not been thoroughly studied for safety in this population.

Can children take Vitamin C supplements?

Children can take Vitamin C supplements, but the dosage should be carefully managed according to their age and specific needs, typically much lower than adult doses. Always consult a pediatrician before giving supplements to children to ensure appropriate dosing and to avoid potential side effects.

Bottom Line

California Gold Nutrition Vitamin C is a safe and effective supplement for most people when taken at recommended doses. Pay attention to the total daily intake from all sources to avoid exceeding the upper limit of 2000 mg, which can cause digestive discomfort.

References

  1. 1.
    FDA Drug Label — DISCOUNT DRUG MART

    FDA DailyMed: DISCOUNT DRUG MART · FDA

  2. 2.
    Vitamin C and Immune Function.

    Carr AC, Maggini S, Nutrients, 2017 · PubMed

  3. 3.
    Vitamin C for preventing and treating the common cold.

    Hemilä H, Chalker E, The Cochrane database of systematic reviews, 2013 · PubMed

  4. 4.
    The Roles of Vitamin C in Skin Health.

    Pullar JM, Carr AC, Vissers MCM, Nutrients, 2017 · PubMed

  5. 5.
    Vitamin C: the known and the unknown and Goldilocks.

    Padayatty SJ, Levine M, Oral diseases, 2016 · PubMed

  6. 6.

Educational content based on FDA labeling, published research, and pharmacist review. Not a substitute for individualized medical advice.