How Long Does It Take to Have an Allergic Reaction to a Vitamin?
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4 min read
While severe anaphylactic reactions to vitamin supplements are rare, most allergic responses can happen within an hour of taking a vitamin, while others may be delayed by hours, days, or even weeks. The answer to **how long does it take to have an allergic reaction to a vitamin?** depends heavily on the type of reaction and the specific substance triggering the immune response.
