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Healthnotes Index:

MSG Sensitivity

Also indexed as:Chinese Restaurant Syndrome
Enjoy the taste of Chinese food and other ethnic dishes without the headaches and nausea that MSG can sometimes cause. According to research or other evidence, the following self-care steps may be helpful.
MSG Sensitivity: Main Image

About This Condition

MSG sensitivity is a set of symptoms that may occur in some people after they consume monosodium glutamate (MSG). The syndrome was first described in 1968 as a triad of symptoms: “numbness at the back of the neck radiating to both arms and the back, general weakness and palpitations.”1

MSG is used worldwide as a flavor enhancer. Although many restaurants now avoid the use of MSG, many still use significant amounts. The average person living in an industrialized country consumes about 0.3 to 1.0 gram of MSG per day. MSG is classified by the US Food and Drug Administration as “generally recognized as safe.” Indeed, many researchers have questioned the very existence of a true MSG-sensitivity reaction. Most clinical trials, including some double-blind trials, have failed to find any symptoms arising from consumption of MSG, even large amounts, when taken with food.2, 3, 4, 5, 6 However, clinical trials have found that MSG taken without food may cause symptoms, though rarely the classic “triad” described above.7, 8, 9 A large trial and a review of studies on MSG both suggested that large amounts of MSG given without food may elicit more symptoms than a placebo in people who believe they react adversely to MSG. However, persistent and serious effects from MSG consumption have not been consistently demonstrated.10, 11, 12

People sensitive to MSG may also react to aspartame (NutraSweet).13

Symptoms

The symptoms of MSG sensitivity have commonly been described as headache, flushing, tingling, weakness, and stomachache. After eating meals prepared with MSG, people with MSG sensitivity may have migraine headache, visual disturbance, nausea, vomiting, diarrhea, weakness, tightness of the chest, skin rash, or sensitivity to light, noise, or smells.

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The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. Self-treatment is not recommended for life-threatening conditions that require medical treatment under a doctor's care. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2015.


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