Tag: 1000mg vitamin c

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What are the side effects of taking vitamin C 1000mg everyday?

Oct 9, 2025 •

4 min read

While generally safe, taking high doses of vitamin C can lead to side effects; for adults, the tolerable upper intake level is 2,000 mg per day [1.3.4, 1.4.4]. So, what are the side effects of taking vitamin C 1000mg everyday?