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How long after eating allergic food do you have a reaction?

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Dr. Barbara Stark Baxter
Internal Medicine - Allergy & Immunology

In brief: Food allergy timing

You can react in minutes, or it can take many hours.
The faster reactions tend to be the most severe and potentially dangerous, even life-threatening, but occasionally, even late reactions can be very dangerous, as in reactions to alpha-gal (http://allergytomeat.Wordpress.Com/frequently-asked-questions/). Atopic dermatitis reactions to foods may not start for a couple of days; last weeks.

In brief: Food allergy timing

You can react in minutes, or it can take many hours.
The faster reactions tend to be the most severe and potentially dangerous, even life-threatening, but occasionally, even late reactions can be very dangerous, as in reactions to alpha-gal (http://allergytomeat.Wordpress.Com/frequently-asked-questions/). Atopic dermatitis reactions to foods may not start for a couple of days; last weeks.
Dr. Barbara Stark Baxter
Dr. Barbara Stark Baxter
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