Hi Kim Robin,
I don't know much about MSG, as nothing seems to effect me much and I love Asian foods, so I probably eat it and like it's taste. The Mayo Clinic normally offers pretty good advice, and HealthCastle probably has a good article archived here somewhere, anyway here is what the Mayo Clinic says.
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Katherine Zeratsky, R.D., L.D.
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Biography of
Katherine Zeratsky, R.D., L.D.
Katherine Zeratsky, R.D., L.D.
As a specialty editor for the Food & Nutrition Center, Katherine Zeratsky helps you sort through the facts and figures, the fads and the hype to learn more about nutrition and diet.
A Marinette, Wis., native, she is certified in dietetics by the state of Minnesota and the American Dietetic Association. She has been with Mayo Clinic since 1999.
She is active in nutrition-related curriculum and course development in pediatrics at Mayo Clinic Rochester and nutrition education related to the physiology and recommended intakes for premature infants.
Other areas of interest include breast milk and formula safety, neonatal feeding, and nutrition for breast-feeding mothers.
She graduated from the University of Wisconsin-Madison, served a dietetic internship at the University of Iowa Hospitals and Clinics, and worked as a registered dietitian and health risk counselor at ThedaCare of Appleton, Wis., before joining the Mayo Clinic staff.
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Question
Monosodium glutamate (MSG): Is it harmful?
Every Chinese restaurant I go to has a sign that says "No MSG." What is MSG? Is it bad for you?
Answer
from Katherine Zeratsky, R.D., L.D.
Monosodium glutamate (MSG) is a flavor enhancer commonly added to Chinese food, canned vegetables, soups and processed meats. Although the Food and Drug Administration (FDA) has classified MSG as a food ingredient that is "generally recognized as safe," the use of MSG remains controversial.
MSG has been used as a food additive for decades. Over the years, the FDA has received many anecdotal reports of adverse reactions to foods containing MSG. But subsequent research found no definitive evidence of a link between MSG and the symptoms that some people described after eating food containing MSG. As a result, MSG is still added to some foods.
A comprehensive review of all available scientific data on glutamate safety sponsored by the FDA in 1995 reaffirmed the safety of MSG when consumed at levels typically used in cooking and food manufacturing. The report found no evidence to suggest that MSG contributes to any long-term health problems, such as Alzheimer's disease. But it did acknowledge that some people may have short-term reactions to MSG. These reactions — known as MSG symptom complex — may include:
Headache, sometimes called MSG headache
Flushing
Sweating
Sense of facial pressure or tightness
Numbness, tingling or burning in or around the mouth
Rapid, fluttering heartbeats (heart palpitations)
Chest pain
Shortness of breath
Nausea
Weakness
Symptoms are usually mild and don't require treatment. However, some people report more severe reactions. The only way to prevent a reaction is to avoid foods containing MSG. When MSG is added to food, the FDA requires that "monosodium glutamate" be listed on the label — or on the menu, in restaurants.
I knew there would be an article on HealthCastle - here you are.
MSG and Your Weight
Written by Gloria Tsang, RD and Lauren Girdler
Published in September 2008
(HealthCastle.com) Researchers from the University of North Carolina recently observed MSG (monosodium glutamate) use in otherwise healthy individuals to investigate a potential connection between those who use the additive and weight gain. They studied 752 Chinese men and women (aged 40-59) randomly chosen from three rural villages in the north and south of China, and found that the number of overweight individuals was significantly higher for MSG users than nonusers. The results of this study were published in the scientific journal Obesity in August 2008.
This is the first human study to look at the link between MSG and weight. Previous studies on MSG and obesity have only been conducted on mice. In those studies, weight gain was significantly greater in MSG-treated mice compared with the control group, even when they were given similar portions of food. A possible explanation for this is that MSG alters the regulatory mechanisms that affect fat metabolism.
What's MSG?
MSG is the sodium salt of glutamate and is simply made up of glutamate, water and sodium. Glutamate is an amino acid, an important component of protein and peptides. Bound glutamate is not responsible for the flavor property; it's the free form of glutamate that provides the flavor-enhancing effect in foods.
Contrary to popular belief, MSG is not high in sodium content. According to the International Food Information Council Foundation, MSG only contains 1/3 the amount of sodium as table salt.
Which foods contain MSG?
Natural Foods: Glutamate occurs naturally in almost all foods, including meat, fish, poultry, breast milk, and vegetables. In general, protein-rich foods such as meat and dairy contain large amounts of bound glutamate. On the other hand, vegetables and fruits (especially peas, tomatoes, and potatoes), mushrooms, and certain cheeses (eg. parmesan) usually contain high levels of free glutamate.
Processed Foods: Processed and prepared foods, such as traditional seasonings, stocks, sauces, and canned soups, can contain significant levels of free glutamate, both from natural sources and from added MSG.
Restaurants: Asian restaurants may add MSG to their cooking.
The Bottom Line
It is too early to conclude that MSG use leads to weight gain based on just one study. However, if you are sensitive to MSG, or simply try to avoid it, always check the ingredient list. The FDA requires labeling of all ingredients on processed and packaged foods. When MSG is added to a food, it must be included on the ingredient list, as "monosodium glutamate." Glutamate-containing food ingredients, such as hydrolyzed protein and autolyzed yeast extract, also must be listed on food labels. Also, if you dine out in an Asian restaurant, simply ask if they prepare foods with MSG. Responsible restaurants will always honor your request to prepare foods without MSG.
Cheers