An MSG allergy occurs as a result of an allergic reaction to MSG or monosodium glutamate. Unlike with other food products, MSG has gained a bad reputation. Take note that MSG is the salt form of glutamic acid which is used as a food additive due to its flavor-boosting properties. It is believed that MSG can cause a variety of allergy-like symptoms which includes hives, MSG-induced asthma, rhinitis, migraine headache and swelling of the face, mouth and tongue.
Based on studies, substantial doses of MSG have triggered symptoms in some individuals but these portions do not show up in grocery stores or restaurants.
Symptoms of MSG allergy
Even though there is high percentage of individuals who use MSG without suffering any detrimental effects, some are still sensitive and can experience the following symptoms.
- Mild chest pain
- Headache
- Flushing
- Sweating
- Numbness in and around the mouth
- Facial swelling or pressure
The serious symptoms include chest pain, shortness of breath, heart palpitations, swelling of the throat and anaphylaxis.
Treatment for MSG allergy
Most cases of allergic reactions to MSG are usually mild and can go away on their own. As for serious symptoms such as anaphylaxis, it would require immediate emergency care in the form of an epinephrine shot or EpiPen. An individual who experiences swelling of the throat or lips, shortness of breath, heart palpitations or chest pain must be taken to the emergency department at the nearest hospital.
Foods to be avoided
At the present, MSG can be difficult to avoid. Take note that MSG is almost present in any food. Foods that are rich in protein such as meat, cheeses, fish and poultry are high in MSG. Additionally, labelling is only required when MSG is added as a direct ingredient. In such cases, it is referred to as monosodium glutamate by the manufacturers.
Dried meats, poultry stocks, meat extracts and hydrolyzed protein which are used as emulsifiers, binders or flavor enhancers must be avoided. Always remember that individuals with MSG allergy must avoid processed and packaged foods as much as possible and opt for raw foods including vegetables, fruits and organic meats.
Diagnosing MSG allergy
If the doctor suspects MSG allergy that is responsible for the symptoms, certain questions will be asked such as if any Chinese food has been eaten or foods that might contain MSG were eaten in the past two hours.
The other signs that can confirm a diagnosis of MSG allergy include a rapid heart rate, diminished air flow into the lungs and an abnormal heart rhythm that is confirmed by an EKG.
As much as possible, individuals who have MSG allergy must avoid processed foods since they usually contain levels of MSG. Even though it is not quite common, there are some individuals who are highly sensitive to the ingredient.