Vitamin C

Ascorbate 🟢 Strong

An essential water-soluble vitamin for antioxidant defense, collagen synthesis, and iron uptake.

⚠ Stones (high dose)See cautions below; consult your physician for specifics.

Reviewed by Dr. Sungwoong Jung · Last reviewed Jul 16, 2026

Key benefits

Neutralizes free radicals

Collagen synthesis for skin, vessels, wounds

Boosts non-heme iron uptake

How it works

Evidence

🟢 StrongClear for correcting deficiency (scurvy)

🟡 Moderate / mixedCold-prevention evidence is mixed

The same nutrient can differ for "correcting deficiency" vs "general prevention."

Suggested use

Split doses after meals for better absorption.

A general suggestion, not a prescription.

Cautions & interactions

Caution with high doses if history of kidney stones.

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Korea vs USA

🇰🇷 Korea

MFDS mark · tablet/powder

🇺🇸 USA

Many forms incl. liposomal

References

NIH ODS — Vitamin C ↗

Grades/refs re-verified at each update (draft).

Zinc Zinc A trace mineral essential for immunity, wound healing, and enzyme function. 🟢 Strong Immune Collagen Collagen Hydrolyzed collagen peptides studied for skin elasticity/hydration and joints. 🟡 Moderate Skin·Beauty Iron Iron Essential for oxygen transport in red cells; especially important for menstruating and pregnant women. 🟢 Strong Blood

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🇰🇷 Buy in Korea 🇺🇸 Buy in USA

Disclaimer — This content is for general information and suggestion only and does not replace medical diagnosis or treatment. Consult a doctor or pharmacist if you have a condition or take medication.