Monosodium glutamate, commonly known as MSG, is one of the most controversial food additives approved for use by the Food and Drug Administration (FDA).
While it's "generally recognized as safe" (GRAS) to be used in the food supply by regulatory agencies, some research shows that it may negatively affect health, which is why many people choose to avoid it.
This article explains what MSG is, what foods it's typically added to, and what the research says about possible health implications.
What is MSG?
MSG is a popular flavor enhancer derived from L-glutamic acid, a naturally occurring amino acid that's necessary for the creation of proteins.
Today, it can be found in a number of processed products, from fast food to canned soups.
MSG boosts the flavor of foods by stimulating taste receptors and has been shown in research studies to increase the acceptance of particular flavors. Adding MSG to foods results in an umami taste, which is characterized as savory and meaty.
This popular additive has been deemed GRAS by the FDA, though some experts argue that it can have potentially dangerous side effects, particularly when consumed on a long-term basis.
The FDA mandates that MSG must be labeled by its usual name of monosodium glutamate when used as an ingredient in food. Foods that naturally contain MSG, such as tomato products, protein isolates, and cheeses, aren't required to list MSG as an ingredient.
Here are 8 foods that commonly contain MSG.
1. Fast Food
One of the best-known sources of MSG is fast food, particularly Chinese food.
In fact, Chinese restaurant syndrome is a condition characterized by symptoms including headache, hives, swelling of the throat, itching, and belly pain experienced by some people shortly after consuming MSG-laden Chinese food.
Although many Chinese restaurants have stopped using MSG as an ingredient, others continue to add it to a number of popular dishes, including fried rice.
MSG is also used by franchises like Kentucky Fried Chicken and Chick-fil-A to enhance the flavor of foods.
For example, Chick-fil-A's Chicken Sandwich and Kentucky Fried Chicken's Extra Crispy Chicken Breast are just some of the menu items that contain MSG.
2. Chips and Snack Foods
Many manufacturers use MSG to boost the savory flavor of chips.
Aside from being added to potato chips, corn chips, and snack mixes, MSG can be found in a number of other snack foods, so it's best to read the label if you want to avoid consuming this additive.
3. Seasoning Blends
Seasoning blends are used to give a salty, savory taste to dishes like stews, tacos, and stir-fries.
MSG is used in many seasoning blends to intensify taste and boost the umami flavor cheaply without adding extra salt.
In fact, MSG is used in the production of low sodium items to increase flavor without the addition of salt. MSG can be found in many low sodium flavoring products, including seasoning blends and bouillon cubes.
4. Frozen Meals
Although frozen meals can be a convenient and cheap way to put food on the table, they often contain a host of unhealthy and potentially problematic ingredients, including MSG.
Other frozen products that often contain MSG include frozen pizzas, mac and cheese, and frozen breakfast meals.
Canned soups and soup mixes often have MSG added to them to intensify the savory flavor that consumers crave.
Perhaps the most popular soup product that contains this controversial additive is Campbell's chicken noodle soup.
Many other soup products, including canned soups, dried soup mixes, and bouillon seasonings, can contain MSG, making it important to check individual product labels.
6. Processed Meats
Processed meats like hot dogs, lunch meats, beef jerky, sausages, smoked meats, pepperoni, and meat snack sticks can contain MSG.
Condiments like salad dressing, mayonnaise, ketchup, barbecue sauce, and soy sauce often contain added MSG.
In addition to MSG, many condiments are packed with unhealthy additives like added sugars, artificial colorings, and preservatives, so it's best to purchase products that are made with limited, whole food ingredients whenever possible.
If you're concerned about using MSG-containing condiments, consider making your own so that you have complete control over what you're consuming. For starters, you can try out these delicious and healthy salad dressing recipes.
8. Instant Noodle Products
A staple for college students around the world, instant noodles provide a quick, filling meal for those on a budget.
However, many manufacturers use MSG to boost the savory flavor of instant noodle products. Plus, instant noodles are typically made from unhealthy ingredients and are loaded with added salt, refined carbs, and preservatives that can harm your health.
Is MSG Harmful?
While research is far from conclusive, some studies have suggested that consuming MSG may lead to negative health outcomes.
For example, MSG consumption has been linked to obesity, liver damage, blood sugar fluctuations, elevated heart disease risk factors, behavioral problems, nerve damage, and increased inflammation in animal studies.
Some human research has demonstrated that consuming MSG may promote weight gain and increase hunger, food intake, and your risk of metabolic syndrome, a group of symptoms that raises your risk of chronic conditions like heart disease and diabetes.
For example, a study in 349 adults found that those who consumed the most MSG were much more likely to have metabolic syndrome than those who consumed the least, and that every 1 gram increase of MSG per day significantly increased the chances of being overweight.
There's also some evidence that MSG increases hunger and may lead you to eat more at meals. However, current research suggests a more complex relationship between MSG and appetite, with some studies finding that MSG may even decrease intake at meals.
Although research is mixed on how MSG may affect overall health, it's clear that consuming high doses of 3 grams or higher of MSG per day is likely to lead to adverse side effects, including headache and increased blood pressure.
For reference, it's estimated that the average consumption of MSG in the United States and the United Kingdom is around 0.55 grams per day, while intake of MSG in Asian countries is around 1.2–1.7 grams per day.
Although it's possible, consuming 3 grams of MSG or more per day is unlikely when eating normal portion sizes.
However, certain individuals who have a sensitivity to MSG may experience side effects like hives, swelling of the throat, headache, and fatigue after consuming smaller amounts, depending on individual tolerance.
Still, a review of 40 studies found that, overall, studies that have linked MSG with adverse health effects are of poor quality and have methodological flaws, and that strong clinical evidence of MSG hypersensitivity is lacking, highlighting a need for future research.
While evidence of MSG sensitivity is lacking, many people report that consuming this additive leads to adverse side effects.
If you think you may have a sensitivity to MSG, it's best to avoid the products listed on this page and always check labels for added MSG.
Furthermore, even though the safety of MSG is debated, it's clear that foods that commonly contain MSG, like chips, frozen meals, fast food, instant noodles, and processed meats, aren't good for overall health.
Therefore, cutting out MSG-laden products will likely benefit you in the long run — even if you aren't sensitive to MSG.
Some studies have associated MSG with negative health outcomes, including obesity and metabolic syndrome. However, more research is needed to substantiate these findings.
The Bottom Line
MSG is a controversial food additive that's found in a wide variety of products. It's commonly added to chips, frozen dinners, fast food, instant noodles, and many other processed foods to enhance flavor.
Although some studies have linked MSG consumption with negative health outcomes, more research is needed to fully understand the potential effects that consuming MSG may have on both short- and long-term health.
If you feel that you're sensitive to MSG, it's best to avoid products that contain it. Be sure to always read food labels to ensure your items are free of MSG.
- MSG Is More Common in Your Food Than You Probably Realize ... ›
- 9 Healthy Foods That Lift Your Mood - EcoWatch ›
- Aloe Vera for Weight Loss: Benefits and Side Effects - EcoWatch ›
- 6 Evidence-Based Health Benefits of Lemons - EcoWatch ›
EcoWatch Daily Newsletter
Coronavirus Shines Light on Zoos as Danger Zones for Deadly Disease Transmission Between Humans and Animals
By Marilyn Kroplick
The term "zoonotic disease" wasn't a hot topic of conversation before the novel coronavirus started spreading across the globe and upending lives. Now, people are discovering how devastating viruses that transfer from animals to humans can be. But the threat can go both ways — animals can also get sick from humans. There is no better time to reconsider the repercussions of keeping animals captive at zoos, for the sake of everyone's health.
- Can Your Pets Get and Transmit Coronavirus? - EcoWatch ›
- Jane Goodall: COVID-19 Is Result of Our Unhealthy Relationship ... ›
- North Carolina Pug Tests Positive for Coronavirus, Could Be First ... ›
<div id="14b13" class="rm-shortcode" data-rm-shortcode-id="3dabcc399c214226e768937f555a5ebc"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1289943962405318657" data-partner="rebelmouse"><div style="margin:1em 0">Tropical Storm #Isaias no longer expected to restrengthen into a hurricane. 🌀 The vertical wind shear shredder has… https://t.co/kqBsJOS3Tj</div> — Ryan Maue (@Ryan Maue)<a href="https://twitter.com/RyanMaue/statuses/1289943962405318657">1596381581.0</a></blockquote></div>
<div id="dea35" class="rm-shortcode" data-rm-shortcode-id="132c2812ba753aaaf415ad33fb7ff2c0"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1290213982947737600" data-partner="rebelmouse"><div style="margin:1em 0">Here are the 5 am EDT Monday, August 3 Key Messages for Tropical Storm #Isaias. For the full advisory on #Isaias, v… https://t.co/5MbSBJmEhI</div> — National Hurricane Center (@National Hurricane Center)<a href="https://twitter.com/NHC_Atlantic/statuses/1290213982947737600">1596445959.0</a></blockquote></div>
<div id="80487" class="rm-shortcode" data-rm-shortcode-id="dcd38a3bef604d3ff7ef47552482cbe4"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1290216672976986113" data-partner="rebelmouse"><div style="margin:1em 0">There is a moderate risk of flash flooding across portions of the eastern Carolinas and Mid-Atlantic states from… https://t.co/C5Ys46ZetX</div> — National Hurricane Center (@National Hurricane Center)<a href="https://twitter.com/NHC_Atlantic/statuses/1290216672976986113">1596446600.0</a></blockquote></div>
- Atlantic Faces Fifth 'Above-Normal' Hurricane Season in a Row ... ›
- Isaias Menaces Bahamas and Florida as 2020 Season's Second ... ›
- Mass-Market Electric Pickup Trucks and SUVs Are on the Way ... ›
- SUVs and Trucks Nullify Car Efficiency Gains - EcoWatch ›
By Kate Whiting
Bernice Dapaah calls bamboo "a miracle plant," because it grows so fast and absorbs carbon. But it can also work wonders for children's education and women's employment – as she's discovered.
These are the world's most bicycle-friendly cities. Statista<p>"The reason we use bamboo to manufacture bicycles is because it's found abundantly in Ghana and this is not a material we're going to import," says Dapaah, one of the World Economic Forum's Young Global Leaders.</p><p>"It's a new innovation. There were no existing bamboo bike builders in our country, so we were the first people trying to see how best we could utilize the abundant bamboo in Ghana."</p>
<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="a335b5dffdd806bd6bb4debea90c2045"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/dxsb9c4HMn0?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
Supporting Students<p>Besides encouraging Ghanaians to swap vehicles for affordable bikes, Ghana Bamboo Bikes Initiative is helping students save time on walking to school so they have more time to learn.</p><p>Each time they sell a bike, they donate a bike to a schoolchild in a rural community, who might otherwise have to walk for hours to get to school.</p><p>Dapaah knows how transformative a shorter journey to school can be to academic performance. She grew up living with her <a href="https://www.youtube.com/watch?v=sb3joGYmx9A&feature=emb_logo" target="_blank">grandpa, a forester in a rural part of the country</a>.</p><p>"We had to walk three and a half hours every day before I could go to school. He later bought me a bike, so I finished senior high and wanted to go to university."</p><p>The experience inspired her to launch Ghana Bamboo Bikes Initiative with two other students at college.</p><p>"When we started this initiative, I looked back and said, when I was young, I had to walk miles before I could get to school, and sometimes if I was late, I was punished.</p><p>"Why don't we donate bikes for students to encourage them to study and so they can have enough time to be on books."</p><p>To date, they have sold more than 3,000 road, mountain and children's bikes – and Dapaah says they plan to donate <a href="https://www.entrepreneur.com/video/350343" target="_blank">10,000 bikes to schoolchildren over five years</a>.</p>
Empowering Women<p>The enterprise is also providing local jobs. It teaches young people to build bikes, particularly women and those in rural communities, where jobs can be scarce. More than 50% of people they have trained are women.</p><p>Dapaah says they want to boost the number of people they employ to 250 over the next five years and they are looking to partner with NGOs to build a childcare facility so mothers can continue to work.</p>
Reducing Emissions<p>By promoting a cycling culture in Ghana, Dapaah says they're also committed to reducing emissions in the transport sector and contributing to the UN's Sustainable Development Goals.</p><p>"I love the idea of reusing bamboo to promote sustainable cycling. People want to go green, low-carbon, lean-energy efficient," she says.</p>
- 7 Non-Toxic Yoga Mats - EcoWatch ›
- Floating Bicyclist Sweeps Plastic From London Waterways - EcoWatch ›
Deforestation coupled with the rampant destruction of natural resources will soon have devastating effects on the future of society as we know it, according to two theoretical physicists who study complex systems and have concluded that greed has put us on a path to irreversible collapse within the next two to four decades, as VICE reported.
- Human Activity Is Making Forests Shorter and Younger, Study Finds ... ›
- Fighting Poverty Can Also Fight Deforestation, New Study Finds ... ›
- Coronavirus Pandemic Linked to Destruction of Wildlife and World's ... ›
- To Stop Amazon Deforestation, Brazilian Groups Take Bolsonaro to ... ›
By Kristen Pope
Melting and crumbling glaciers are largely responsible for rising sea levels, so learning more about how glaciers shrink is vital to those who hope to save coastal cities and preserve wildlife.
Groans, Creaks, Icebergs’ Calving Splashes<p>Oskar Glowacki already knew that melting glacial ice sounds like frying bacon. As ice bubbles burst, anyone nearby can hear crackling and popping, said Glowacki, a postdoctoral scholar at the Scripps Institution of Oceanography. Using hydrophones, he and other scientists now can make more nuanced measurements of how a changing climate sounds underwater, from the groans, creaks and splashes of a calving iceberg to the changes in whale songs as the ocean warms.</p><p>Glowacki recently used a pair of hydrophones to study the underwater world of glaciers, publishing his findings in <a href="https://www.the-cryosphere.net/14/1025/2020/" target="_blank">The Cryosphere</a>. He and co-author Grant B. Deane measured glacier retreat by <a href="https://yaleclimateconnections.org/2020/07/melting-glaciers-sound-like-frying-bacon/" target="_blank">recording the sounds of ice</a> – from small chunks to enormous slabs – falling off the glacier and splashing into the water.</p><p>During the summer of 2016, Glowacki's team placed two hydrophones near Hansbreen Glacier in Hornsund Fjord, Svalbard. For a month and a half, they recorded sounds, also using three time-lapse cameras to collect images – including the "drop height" (how far the ice fell into the water) – so they could compare photos to the recordings. The team created a formula to represent the relationship between the size of a piece of ice falling from a glacier and the sound it makes underwater, also accounting for the pieces of ice falling from varying heights. (Hear an example of the sound an iceberg makes while calving <a href="https://soundcloud.com/user-248456662/iceberg-calving-hansbreen-glacier" target="_blank">here</a>.)</p>
Unlocking Information About Antarctic Ice Shelf<p>Other researchers also are using hydrophones to learn more about crumbling glaciers. Bob Dziak, research oceanographer with the NOAA/Pacific Marine Environmental Laboratory <a href="https://www.pmel.noaa.gov/acoustics" target="_blank">acoustics research group</a>, captured a massive calving event of the Nansen Ice Shelf in Antarctica with a hydrophone. He published the results with colleagues in <a href="https://www.frontiersin.org/articles/10.3389/feart.2019.00183/full" target="_blank">Frontiers in Earth Science</a></p><p>On April 7, 2016, satellite images showed a massive calving event had occurred on the ice shelf. The paper described it as the "first large scale calving event in >30 years."</p><p>However, once Dziak and colleagues delved into the data from three hydrophones deployed 60 kilometers east of the ice shelf, they uncovered a series of "icequakes" from January to early March 2016. He and other researchers believe that much of the ice actually broke free in mid-January to February, but it remained in the same location until an April storm – which their paper described as the "largest low-pressure storm recorded in the previous seven months" – broke the ice free.</p><p>"We suspected that the icebergs broke apart but remained in place – kind of pinned in place – until a major storm with high winds passed through the area and, finally, it was that last push that pushed the icebergs out to sea," Dziak says.</p><p>He and his co-authors wrote that "fortuitous timing and proximity of the hydrophone deployment presented a rare opportunity to study cryogenic signals and ocean ambient sounds of a large-scale ice shelf calving and iceberg formation event."</p>
Listening to Songs of Humpback Whales<p><a href="https://www.mbari.org/" target="_blank">Monterey Bay Aquarium Research Institute</a> studies the ocean, including its acoustics. One of the institute's projects involves examining the soundscape of California's Monterey Bay, including sounds from animals, humans, weather, and geologic processes like earthquakes. The researchers once even recorded an under-sea landslide. They also focus on recording and analyzing the <a href="http://www.mbari.org/humpback-song/" target="_blank">songs of humpback whales</a>. Male humpback whales' songs can be over 15 minutes in length, and they can be repeated for long periods of time – even hours. Listening to these songs and analyzing them can provide unique insights into the lives of these complex animals.</p><p>"Any time we want to study marine mammals, sound gives us a window into their lives because they use sound for all of their essential life activities, really," says institute biological oceanographer John Ryan. "Communication, foraging, reproduction, navigation – depending on the species, of course."</p><p>Previously, scientists had thought singing occurred only during courtship and mating, but now they think whales may also use song while migrating and hunting. They know song has a crucial role in the whales' lives.</p><p>"There's a whole other dimension to humpback whale song," Ryan says. "It is a mode of cultural transmission in this species. They learn songs from each other. They share songs as a population, and when populations mix and mingle, they learn new ideas, they explore with their song, improvise, and it's a real essential part of their culture."</p>
By William S. Lynn, Arian Wallach and Francisco J. Santiago-Ávila
A number of conservationists claim cats are a zombie apocalypse for biodiversity that need to be removed from the outdoors by "any means necessary" – coded language for shooting, trapping and poisoning. Various media outlets have portrayed cats as murderous superpredators. Australia has even declared an official "war" against cats.
Faulty Scientific Reasoning<p>In our <a href="https://doi.org/10.1111/cobi.13527" target="_blank">most recent publication</a> in the journal Conservation Biology, we examine an error of reasoning that props up the moral panic over cats.</p><p>Scientists do not simply collect data and analyze the results. They also establish a logical argument to explain what they observe. Thus, the reasoning behind a factual claim is equally important to the observations used to make that claim. And it is this reasoning about cats where claims about their threat to global biodiversity founder. In our analysis, we found it happens because many scientists take specific, local studies and overgeneralize those findings to the world at large.</p><p>Even when specific studies are good overall, projecting the combined "results" onto the world at large can cause unscientific overgeneralizations, particularly when <a href="https://doi.org/10.1016/j.tree.2015.01.003" target="_blank">ecological context is ignored</a>. It is akin to pulling a quote out of context and then assuming you understand its meaning.</p>
Ways Forward<p>So how might citizens and scientists chart a way forward to a more nuanced understanding of cat ecology and conservation?</p><p>First, those examining this issue on all sides can acknowledge that both the well-being of cats and the survival of threatened species are legitimate concerns.</p><p>Second, cats, like any other predator, affect their ecological communities. Whether that impact is good or bad is a complex value judgment, not a scientific fact.</p><p>Third, there is a need for a more rigorous approach to the study of cats. Such an approach must be mindful of the importance of ecological context and avoid the pitfalls of faulty reasoning. It also means resisting <a href="https://doi.org/10.1111/cobi.13126" target="_blank">the siren call of a silver (lethal) bullet</a>.</p>
- Small Wild Cats Face Big Threats Including Lack of Conservation ... ›
- Cats Wreak Havoc on Native Wildlife, but We've Found One ... ›