Tag Archive for: salt

Readers Report on MSG

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Of the dozens of responses to the Memos on MSG, most readers reported the types of symptoms commonly attributed to MSG along with some interesting physical responses. Several people responded that they had always heard to avoid MSG, so they have. I thought one particular comment was interesting: upon looking at the foods that contain MSG, especially snack food, he wouldn’t eat them anyway so it was never an issue for him.

Many people get a true allergic response within minutes of ingesting MSG. This is the list of reactions: swelling, hives, itching, redness, headache, migraines, coughing, palpitations, shortness of breath, numbness around the mouth and cheeks, joint stiffness, pain in the arms, sleepiness, stupor, trouble sleeping, vomiting, and diarrhea. If they avoid MSG, they don’t have the symptoms.

There were a couple of unusual reactions I have to mention. One individual found that if he has MSG in food for dinner, he has vivid dreams, usually involving someone chasing him around or being in a struggle situation. He never gets them otherwise, so he avoids MSG.

Another person said when he eats food with MSG, he craves chocolate.

The common theme was that everyone used trial and error to find the culprit. Here’s your challenge, even if you’ve never attributed a problem to MSG: if you get some of the symptoms on the list, examine the content of the foods you eat. Can you narrow down a suspect for your symptoms? The goal is know yourself and the way to do that is to pay attention.

What are you prepared to do today?

        Dr. Chet

MSG Is Safe, But Be Wary

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The controversy regarding MSG certainly won’t end with this Memo, but I want you to know what the research says so you can make an informed decision. There’s no question that some people have sensitivities to certain food additives, and I’m not diminishing that response in any way. My point in doing this series of Memos was to dispel myths that have grown around some food additives such as MSG.

Why was the early research wrong? The Chinese Restaurant Syndrome grew from a single physician who described how he felt after eating Chinese food. More case studies were published, then small trials that seemed to support the observation. As time went on, trials with better controls over subjects and their reactions were done to test those responses attributed to MSG.

Regarding the excitotoxic brain damage, for the most part, that research injected glutamate (and not MSG) directly under the skin or directly into the digestive system. Because of its importance in so many chemical reactions, glutamate is tightly regulated and does not cross the blood-brain barrier. In other words, the research could have been done better. When it was, the results of those studies could not be duplicated.

Where does that leave you? Reading labels, I hope. I just checked the label of smoked ham: no MSG but there were at least three different sources of sodium. Same was true for beef jerky. That contributes to the high sodium intake we all have if we eat those foods.

You can’t really get away from MSG anyway; it’s naturally found in so many foods such as meats, cheeses, and even in tomatoes. There could be a benefit to using MSG: it may lower your overall sodium intake because it takes a lot less MSG to give the umami flavor than salt does.

But be wary. Umami flavor can become addictive. You know those chips I like so much? Some have MSG added, and they’re tough to eat in reasonable amounts. It may be best to avoid them altogether unless you can control the quantity you eat. That was why MSG was thought to cause weight gain; by itself, it doesn’t but it can cause a person to overeat, and that for sure will increase body weight.

Like anything else, unless you’re allergic, MSG can be a part of a reasonable diet to add flavor to food. If it helps make people want to eat broccoli and cabbage, I’m all for that because the benefits of the vegetables far outweigh any harm from the sodium.

Don’t forget to let me know if you’ve ever had a negative reaction to MSG. I’ll give the results next week.

What are you prepared to do today?

        Dr. Chet

References:
1. Questions and Answers about MSGhttp://bit.ly/32tvELS.
2. N Engl J Med 1968; 278:796.
3. Science. 1969 May 9;164(3880):719-21.

Early Research on MSG

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People have been ranting against MSG for decades, but I never paid attention until I read a study on a group of subjects who said they had a negative response to eating Asian foods. The subjects were tested under four scenarios consecutively, dependent on their response to the prior test results. The study demonstrated that when exposed to massive amounts of MSG versus a placebo, there were no consistent responses from this sensitive group of subjects. That’s meaningful because it challenged common knowledge.

That common knowledge began with a letter to the New England Journal of Medicine by a physician after reporting symptoms he felt after eating a meal of Asian foods; it wasn’t research, just a personal anecdote. At the same time, a researcher from Washington University in St. Louis began a series of studies on glutamate and other protein precursors that demonstrated the excitotoxicity affects on brain tissue; excitotoxicity (ex-SIGHT-o-tox-ISS-i-ty) refers to nerve cells being damaged or killed by excessive stimulation by the neurotransmitter glutamate. That was when the bulk of the negative research on MSG drew attention. However, over a period of years, other researchers attempted to duplicate those studies with unsuccessful results.

Where does that leave us? Other than a variety of conspiracy theories, MSG doesn’t seem to have the negative impact that has been attributed to it. I’ll finish this up on Saturday but my original question still stands: if you feel you respond negatively to MSG, reply to this email and I’ll let you know the results next week.

What are you prepared to do today?

        Dr. Chet

References:
1. N Engl J Med 1968; 278:796.
2. Science. 1969 May 9;164(3880):719-21.

A Closer Look at Monosodium Glutamate

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People these days love salty, and as I’ve said before many times, I especially love salty: nuts, chips of any kind, cured meats such as ham. I believe if bacon weren’t salty, it wouldn’t be as popular as it is. Mix salt with amino acids, especially glutamine, and it creates a taste called umami. It’s an almost irresistible flavor that some people, if not most, can’t stop eating.

Now what if I told you that monosodium glutamate (MSG) had been added to those specific foods to give it that umami taste? (It hasn’t, so don’t throw out the bacon or jerky just yet.) What would you think then? You might not be so enamored with those foods because MSG has been linked to headaches and brain dysfunctions. Some people attribute symptoms of allergic reactions to MSG that include breathing issues, the aforementioned headaches, and many other neurological-type issues.

Would you believe that MSG probably doesn’t cause those symptoms in most people? That the “research” showing that MSG is bad was poorly done, and to some degree, wasn’t even really research? For sure, you don’t want to miss Thursday’s Memo. Until then, let me know if you’ve responded negatively to MSG by replying to this Memo.

What are you prepared to do today?

        Dr. Chet

Reference: Questions and Answers about MSG http://bit.ly/32tvELS.

What Happens if You Give Up Salt?

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The next category of foods that you could give up for Lent is salt and sodium. Why do I mention both? Because they’re not exactly the same thing. Salt is sodium-chloride, a one to one proportion of sodium and chloride; sodium is just sodium. The typical American takes in over three grams or 3,000 mg of sodium per day. The upper limit is 2,300 mg and the goal is 1,500 mg. In past centuries, packing a food in salt was one way to preserve it, but with today’s refrigeration systems, we don’t need salt as a preservative. We just like it.

Where do we find sodium? Salt is added to all types of chips, nuts, processed meats, and deep-fried foods. But sodium is also added to many types of prepared foods. With the emphasis on reducing fat and carbohydrates, the flavor is often enhanced with sodium.

What could you expect to happen if you reduced your salt and sodium intake? You would probably lose some fluids. You body must keep sodium in a specific ionic balance, and reducing sodium would reduce the need for additional fluid. That could result in the reduction of blood pressure, something almost everyone could benefit from. That eases the strain on the heart, which won’t have to pump as hard because the resistance would not be as great.

As I’ve confessed before, I’m a salt-aholic so I’m going to work on reducing my sodium intake—no salty crunchy chips or roasted nuts, and no added salt to anything. I’ll also limit my intake of processed meats such as ham and bacon. We’ve become used to salt and sodium and it’s jaded our taste buds. No substitutions for this one. Time to retrain our taste.

What are you prepared to do today?

Dr. Chet