Weight-level medical journal "Individual Science Years" published the day before yesterday (2025-8-19) Monosodium Glutamate and Atrial Fibrillation in a 78-Year-Old Woman: A Case Report (Glutamate and Atrial Fibrodysfunction: A Case Report of a 78-year-old woman).

Glutamate (also called lycolic acid) is commonly known as MSG. Regarding MSG, I published two articles shortly after I founded this website on March 18, 2016:

Is MSG published on 2016 harmful? Is it just a copy of the information on the Taiwan FDA website (please see the end of this article). The continuous knock-on of the MSG dispute published on March 30, 2016 pointed out that there have always been people in the medical community that MSG is harmful to health.

The article published in "Annual Prescription of Internal Sciences" reports a case that suspected to be atrial dysfunction (simplely called "Atrial"). A 78-year-old woman with severe obesity (BMI44) with high blood pressure and long-term pain was diagnosed with a new uterine dysfunction, and her condition has not improved despite taking medications that control the uterine dysfunction. Dietary assessments conducted after 8 months of atrial diagnosis showed that this patient consumed mixed spices rich in MSG for a long time. It is estimated that her intake is 2-3 times a day, 2-4 servings each time (0.5 grams per serving), about 6 grams of MSG daily, lasting for several months. After she stopped eating MSG from the doctor's advice, the number of atrial episodes gradually decreased, and after about 3 months, her heart rhythm returned to normal.

The author of this article believes that although age and hypertension are confirmed risk factors for atrial disease, the patient continued to have atrial disease after receiving the drug treatment, and the atrial disease was relieved after stopping the use of MSG, so this shows that MSG should be the real cause of MSG. In fact, the author of this article published a paper that also suspected that MSG may lead to vasodilation. Please see Recurrent atrial fibrillation episodes related to monosodium glutamaterial (MSG) – a case report [Reactive atrial atrial dysfunction related to glutamate (MSG)]

The patient in this case was a 63-year-old male doctor. He was detected by his Apple watch after jogging in the early morning of September 2021, and later he diagnosed this arrhythmia problem through 12-directed cardiac signs in the door. After that, he relapsed nearly 12 times, and the intervals of each session were shorter than the previous one. Early development intervals were greater than one month, and the next development occurred twice a week. The only common point in 6 of the 8 releases was that he had purchased Chinese food at different restaurants 2 hours before the release.

This patient underwent cardiac cold ablation and atrial radiotherapy, and avoided any form of Chinese food or other foods that may contain MSG. In more than a year, he has not appeared in the room again. Therefore, the author of this article said in the conclusion that they suggest that people who are sensitive to MSG should avoid foods containing MSG. (Note: This is absolutely impossible. Please continue)

The US FDA issued Questions and Answers on Monosodium glutamater on 2012-11-19 (updated on 2018-1-4). I copied 3 of these questions as follows:

Question: How is MSG made?

A: MSG is naturally found in many foods, such as tomato and cheese. Since ancient times, people around the world have consumed foods rich in MSG. …… Currently, MSG is produced through fermentation of powder, beets, sugarcane or molasses. This fermentation process is similar to that of making fine, vinegar and wine.

Q: Can MSG be safe to eat?

Answer: The FDA believes that adding MSG to food is "generally considered safe" (GRAS). Although many people believe they are allergic to MSG, scientists have not found allergic reactions in these groups in their studies on taking MSG or comfort agents.

Q: Has the FDA received a report on adverse events related to MSG?

A: Over the years, the FDA has received reports of symptoms such as headache and disgust after eating foods containing MSG. However, we were unable to determine whether MSG was causing these side effects. These adverse event reports prompted the FDA to commission an independent scientific organization, the United States Experimental Biology Association (FASEB) to review the safety of MSG in the 1990s. FASEB's report concluded that MSG is safe. FASEB's report notes that some sensitive groups may experience short-term, short, and often mild symptoms such as head pain, numbness, flushing, tingling, palpitations and lethargy. However, a typical serving of MSG added contains less than 0.5 grams of MSG. It is unlikely that more than 3 grams of MSG can be taken under disposable non-food conditions.

Taiwan's FDA released on 2016-1-11 (updated on 2022-11-29) that people often hear that they should not add MSG to the dishes. Is MSG really toxic?. I copied 3 of them as follows:

1. Even if the dish does not add MSG at all, we will get about 20 grams of MSG from our normal diet every day.

2. Eating MSG with normal consumption is not harmful to the human body, and there is no evidence that MSG consumption is related to any chronic disease.

3. A very small number of people may experience food intolerance such as head pain, disgust, rapid heartbeat, and red faces within a few hours after eating MSG. It is best to avoid eating.

In general, since MSG is widely present in natural foods, it is impossible to completely avoid it. However, we can choose to eat only MSG in natural foods and not add MSG (no food left) so as to avoid problems caused by excessive food, including atrial dysfunction.

Original text: Does MSG cause atrial dysfunction?