Tag: 4000 mg vitamin c

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Is 4000 IU of vitamin C too much for your health?

Dec 25, 2025 •

4 min read

According to the National Institutes of Health, the tolerable upper intake level (UL) for vitamin C in adults is 2,000 milligrams (mg) per day. Taking a dose of 4000 IU is actually not the correct measurement for this vitamin, but if interpreted as 4000 mg, it is double the recommended daily upper limit and can lead to adverse side effects.

What Happens If I Drink 4000 mg of Vitamin C? Understanding the Risks and Side Effects

Nov 13, 2025 •

4 min read

The tolerable upper intake level (UL) for adult vitamin C is 2000 mg per day. So, what happens if I drink 4000 mg of vitamin C? This amount significantly exceeds the recommended limit and can lead to notable side effects, even though it is not typically life-threatening.