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Can Too Much Vitamin C Cause Hives or a Rash?

by
author image Adam Cloe
Adam Cloe has been published in various scientific journals, including the "Journal of Biochemistry." He is currently a pathology resident at the University of Chicago. Cloe holds a Bachelor of Arts in biochemistry from Boston University, a M.D. from the University of Chicago and a Ph.D. in pathology from the University of Chicago.
Can Too Much Vitamin C Cause Hives or a Rash?
Hands scratching due to rash. Photo Credit Heike Kampe/iStock/Getty Images

Hives or a rash are a common skim problem that can occur as a result of dry skin or a reaction to a food or medication. Although high doses of vitamin C don't usually cause these symptoms, a breakout of hives or a rash after taking a supplement or consuming a food with vitamin C may indicate an allergy.

Vitamin C Toxicity

Although vitamin C is generally safe when taken at recommended levels, too much can cause side-effects, such as diarrhea, nausea, abdominal cramping and flatulence. Too much vitamin C can also affect the composition of your urine and lead to an increased risk of kidney stones. The maximum recommended daily intake of vitamin C is 2,000 milligrams; taking less than that is unlikely to cause serious side-effects.

Signs of an Allergy

Although excessive vitamin C is not generally associated with skin rashes or hives, vitamin C supplements or vitamin C-rich foods may trigger an allergy. Hives and a rash are a common symptom of an allergy to a food or supplement, and if they consistently occur after ingesting a food or supplement, it strongly suggests an allergy. If you develop these symptoms, you should stop consuming the food or supplement and talk to a doctor.

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