Taking 1000 mg of vitamin C plus 10 mg of zinc together is safe and doesn't cause bad side effects when used to treat colds, according to two medical studies.

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Pro

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Against

Evidence from Studies

Supporting (1)

50

Community contributions welcome

50

A Combination of High-Dose Vitamin C plus Zinc for the Common Cold

Randomized Controlled Trial

Human

2012

The study looked at the exact same vitamin C and zinc combination for colds and found it was safe and well tolerated, just like the claim says.

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

A Combination of High-Dose Vitamin C plus Zinc for the Common Cold

Score: 50

DOI: 10.1177/147323001204000104

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