7 like 1 dislike
in General Factchecking by Newbie (360 points)
Celsius and other caffeinated drinks can lead to brain fog and fatigue.
ago by (100 points)
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The article claims that Celcius causes brain fog. Celcius is a very popular energy drink right now, so the name in the title would lead many people to click on it. However, the article really means to talk about caffeine in general, citing a study on coffee. One study cited is from the Cleveland Clinic, which, when looking at the original article, is true. The second study is from the Journal of Clinical Sleep Medicine, which is also a true claim. Both of these sauces are reputable. The article itself has relatable sources to back its claims. Despite the slight clickbait of the title, the article successfully and correctly supports its claims.
ago by Newbie (260 points)
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The article makes a solid claim around the connection between Celsius and brain fog, but, the brain fog can occur with many caffeinated drinks. This makes it appear as if the author chose a title that utilizes clickbait and the name-power of a popular drink brand like Celsius.
ago by (100 points)
0 0
This article argues how caffeine can begin brain fog and all of the negative effects. The article explores caffeine, and how it can lead to CFS, chronic fatigue syndrome. By analyzing the brain on a biological level and statistics on caffeine versus sleep, the article provides convincing evidence towards the side effects of caffeine. However, the title is misleading as it argues on the potential downfall of Celsius yet goes on to write about caffeine in general. Nonetheless, using reputable sources like the Cleveland Clinic makes the source more reliable and trustworthy, especially within the medical field.
ago by Newbie (220 points)
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I disagree. While the comparison between Celsius and caffeine makes sense, it doesn’t directly address the article’s main point. Additionally, brain fog isn’t a clinically defined condition, making it difficult to research accurately. The Cleveland Clinic states, “Although caffeine is generally considered safe, consuming as little as 300 milligrams per day can increase your risk of negative side effects, including nausea, anxiety, sleeplessness, and restlessness.”

https://health.clevelandclinic.org/how-to-quit-caffeine
ago by Newbie (260 points)
0 0
The article suggests that Celsius, a popular energy drink, may lead to brain fog. However, it primarily focuses on the effects of caffeine, using studies that discuss coffee rather than Celsius specifically. The Cleveland Clinic and the *Journal of Clinical Sleep Medicine*, both credible sources, are cited accurately to support the article’s claims about caffeine’s impact on mental clarity. While the title may have a clickbait angle by mentioning Celsius, the article is well-supported by reputable sources and provides valid information on caffeine's effects.

51 Answers

8 like 0 dislike
by Novice (800 points)
selected by
 
Best answer

The article claims that Celsius and other caffeinated drinks can lead to brain fog and fatigue after restless nights and sleep deprivation. 

Throughout the article, different sites are linked to provide more in depth explanations of causes and effects of caffeine. Dr. Dennis Lipton explains "people with brain fog may not realize how bad they feel until they treat it and suddenly feel- and think- better." That being said, the intake of caffeinated drinks isn’t the leading cause of brain fog and fatigue, but could be factored in restless nights and deprivation of sleep. However, these symptoms are not detrimental and can be treated. According to Lipton, "treatment can be as easy as going to bed earlier, sleeping with oxygen (for sleep apnea), consuming less alcohol and caffeine,". Given that, it is shown that brain fog and fatigue is a result of many different aspects, not just caffeine. Caffeine is just a product that many who struggle with chronic fatigue syndrome (CSF), insomnia, etc use to combat symptoms. Another aspect that is interesting is from Christopher Drake et al article that agrees with the notion "caffeine taken 6 hours before bedtime has important disruptive effects on sleep and provides empirical support for sleep hygiene recommendations to refrain from substantial caffeine use for a minimum of 6 hours prior to bedtime." This may be a fact in which many people don't take into account. Those that are struggling with constant fatigue and drowsiness may use caffeine more frequently and past the time slot recommended. With that, they don't receive proper sleep and will continue this vicious cycle. 

The heading of this article is made to hook people's attention and get them to click, but is misleading. Although caffeine doesn’t directly result in brain fog and other symptoms stated in this article, it can take a toll on people's sleep schedules and habits. The lack of sleep can cause symptoms of brain fog, fatigue, dehydration, and others, but isn’t the actual cause. 

https://www.vailhealth.org/news/could-it-be-brain-fog

https://pmc.ncbi.nlm.nih.gov/articles/PMC3805807 

Exaggerated/ Misleading
by Novice (600 points)
0 0
I found this to be an excellent fact check on the article above. Your use of other sources to show how caffeine has effects that may worsen fatigue, drowsiness, or "brain fog" when consumed without considering time and situation was very helpful. It helped establish where the claim came from and how some may find it to feel true, but also explains how good habits with caffeine consumption can lessen or erase those issues. I think something that could've used more emphasis in your response is the arbitrariness of the term brain fog. To associate "brain fog", such an unclear term with no tangible or identifiable traits or symptoms, to such a commonly used substance such as caffeine, allows for so much misinterpretation and grey area that cannot be disproven. While it may exist and caffeine may be associated in some way, these are such broad terms that it is difficult to pin down any causes of substance anyways.
by Newbie (260 points)
1 0
This answer is perfectly worded and explains everything precisely. I appreciate how the author explained how caffeine doesn't cause brain fog, but it will only enhance it. Brain fog is caused by underlying issues. This answer goes into those issues and addresses how they can be cured.
The source that I found had remarkably similar information to the additional sources within this answer. They both talked about how caffeine will only enhance brain bog but does not create it. (https://thecenterforfunctionalhealth.com/blog/why-coffee-can-make-brain-fog-worse/)
I also appreciate how the author of this response makes it clear that the claim is exaggerated and not the full truth. That's important to note as the claim is intriguing.
by Newbie (230 points)
0 0
Hey Eevi, great job on this fact check. I think you did an especially great job in validating yourself when you drew on multiple other sources to question the claim. This is something that I try to do too, because no matter how accurate or inaccurate a claim and its source can be, unless it can be traced to other locations the validity is certainly questionable. In addition, I like how you questioned whether or not 'brain fog' is a clear and identifiable medical term. Nice job!
by Newbie (360 points)
0 0
This fact check is great! You added quotes from the articles linked in the text, as well as referenced your thoughts on why the statements don't lead up to his reasoning. I agree with the title as well, I never understood why Celcius was such a main reasoning when it was never mentioned because caffeine is a reason for losing sleep and certain foods creating fatigue.
by Novice (600 points)
0 0
This answer is very well researched and informative for how this information is misleading, while not being completely untrue. There's the difference between cause and correlation. You cited multiple reliable sources to make your argument, this is a great fact-check!
by Novice (520 points)
0 0
Your factcheck goes in depth and uses plenty of quotes to backup your stance that the claim is false. Both sources are reputable and the claims come from doctors so the responses seems legit. It does seem that there are other sources that claim to avoid energy drinks when having brain fog, but it doesn't seem to result in a direct correlation. Because of this I am inclined to agree with your claim, since the initial claim was that celsius caused brain fog.
by Newbie (220 points)
0 0
I really appreciate the thoroughness of your fact-checking. It’s great how you highlighted multiple factors that can contribute to brain fog, not just focusing solely on celsius as the primary cause. This approach provides a more nuanced understanding of the issue. Additionally, your inclusion of various sources adds depth to the discussion, making it clear that you’ve done extensive research. The details you provided further enhance the credibility of your conclusions, illustrating the complexity of brain fog and its many potential contributors.
by Newbie (200 points)
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This is a very thorough  answer! The linked study from Drake et. al in the JCSM focuses on side effects experienced in sleep which provides effective context for the symptoms of "brain fog" although it still is clearly misleading in the matter of the original claim.
by (180 points)
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This was thorough and information filled and you even quoted a real doctor.
by Newbie (220 points)
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Thank you for this information and summary of the article! This is a very good thing for me to know since I drink a lot of celsius in my daily life. Thank you for pointing this out!
by Newbie (230 points)
0 0
I think this fact check is extremely reasonable. You use direct quotes from the source they provided in addition to two more credible sources addressing the issue with this post. I really liked how you explained that caffeine, such as in Celsius, does not directly impact brain fog and sleep deprivation, but it indirectly causes these symptoms as a result of the habits and culture around caffeine intake and sleep cycles. There is a difference between causation and correlation, and this article and reasoning is a perfect example of looking at multiple studies before concluding a big claim. One thing that stood out to me however is that one of your sources from Vail Health was posted in 2017, which was 7 years ago. I wonder if that has any impact on your conclusion, given the work-life-sleep culture in modern day.
by Novice (520 points)
0 0
I appreciate the depth of this and  how you highlighted several factors that could contribute to brain fog rather than focusing solely on Celsius as the main cause. This balanced approach offers a more nuanced understanding of the issue. The variety of sources you included enriches the discussion, showing the extent of the research. The details provided add more credibility to your conclusions, illustrating the complexity of the topic.
by (180 points)
0 0
I agree with your point about the misleading nature of the article's title. It’s easy to see how readers could jump to the conclusion that caffeine is the direct cause of brain fog rather than a contributing factor through sleep disruption.
by Newbie (290 points)
1 0
I agree with everything you've said, and it was extremely helpful how you added insight from doctors. You were very thorough with your answer, and you pointed out different factors that might contribute to brain fog rather than Celcius which was interesting to read about.
by Novice (630 points)
1 0
This is a very thorough fact check as you explained the scientific process behind the claim and sited valid scientific sources such as the National Library of Medicine. I think you accurately identified the title claim as exaggerated/misleading because although it does acknowledge that it's a possibility (can) and not a definite (will), the claim doesn't explain the link between Celsius and sleep patterns, which is what really causes the brain fog and fatigue, not to mention the circumstances of its use. With you bringing up how rules such as the 6 hours before do not always apply to people with conditions such as chronic fatigue, I wonder how well researched this field is to be making claims such as that?
by Novice (840 points)
0 0
While I agree with your claim and the evidence you provided, I do think that you could have certified the specific people you were quoting.
by Novice (650 points)
0 0
Thank you for doing such a thorough fact-check. I drink at least one Celsius every day, so the title was concerning, to say the least. I appreciate how you thoroughly examined the claim and offered an explanation for what Celsius can do, It’s reassuring to know that it doesn’t contribute to brain fog, but it can impact your sleep schedule, which is still something to be mindful of.
by (100 points)
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I heavily agree with the misuse of information in the title. It was very helpful how you gave real insight from medical professionals in your claim.
by (180 points)
0 0
I like that you emphasize the multifaceted nature of brain fog and fatigue, noting that they stem from various factors, not just caffeine. You also use credible sources and quotes from experts to add weight to your argument and help clarify the indirect role of caffeine in brain fog.
by Newbie (260 points)
0 0
This is some super in depth research, its honestly great to know. I love drinking celcius and i have a lot of caffine throughout my daily routines, i can def vouch for the sleep issues! Great fact check!
ago by Novice (580 points)
0 0
I really enjoyed reading your response and I thought you did a clear job of explaining the effects of Celsius on the brain. It is important to note that caffeine is an addictive drug and will have negative effects on the brain regardless of how it is consumed. I found your research on sleep issues very insightful
ago by (190 points)
0 0
Your answer to the question was very thoughtful. You did extensive research into this topic and ensured that you cited accredited sources. As someone who is incredibly reliant on caffeine in my everyday life, I can definitely attest to how it can mess up your sleep schedule!
2 like 0 dislike
by Novice (940 points)

The article claims that energy drinks such as Celsius, gives the consumer brain fog and fatigue in mornings. 

The site claims "Vail Health", "does not recommend following an overall nutritious diet because blood sugar swings can cause inconsistent brain fuel, thus resulting in brain fog."

The linked Vail Health site reads "Brain fog is fairly common, but it’s not normal; it’s actually a symptom of other problems, which can be as simple as not sleeping well or as serious as low or high blood sugar in a person with diabetes." This site is a .ORG site which makes it more trustworthy, and I found one mention of caffeine on this site; "Many times, treatment can be as easy as going to bed earlier, sleeping with oxygen (for sleep apnea), consuming less alcohol and caffeine, eating healthy food regularly and even drinking more water. Studies have shown dehydration contributes to poor brain function (kids who drank a few cups of water before a cognitive test did better than the control group), and in the High Country, it’s easy to become dehydrated."

Throughout the article, there were claims that caffeine consumption effects sleep by a lot, which then causes brain fog due to the lack of sleep, which is true, but the site's headline is clearly clickbait trying to get people to click and read the article, even stop consuming coffee and energy related drinks. But the linked evidential sites claimed from their studies that brain fog comes from lack of sleep and dehydration, and not directly from consumption of coffee or energy related drinks. 

Exaggerated/ Misleading
by Novice (910 points)
1 0
I appreciate how in-depth you went into trustworthy ".org" sites and a quote about a study that found evidence that this claim is true, it gives your claim a solid background. Claiming the title is clickbait, however, goes against all the credibility you gave your claim considering you reference sites that proved the new title true. I would also suggest looking at a second source not just the source provided.
by Newbie (260 points)
0 0
Great job factchecking! You were very thorough in your research of the claim. One detail that could have furthered your fact checking is looking into specific details/statistics mentioned in the article. For instance, the article states that around 1 million Americans are affected by brain fog- Is this statistic true? Though you do mention how many of the sources they quote are reliable because of their .org status- does anything else make them reliable? Are the sources scientific or particularly knowledgable regarding celsius or brain fog? Overall, a couple details would benefit your fact-checks!
by Newbie (220 points)
0 0
I like the lengths that you went to to ensure that the sources used were reliable. It really makes be believe you're claims as you were really thorough with your research. I liked how you pointed out that causation does not equal causation as there are other factors that may cause brain fog for an individual.
by Newbie (260 points)
0 0
I really appreciate how in depth you went with your answer. It really makes me believe and trust that what you're saying is reliable and true. I really appreciate how you mentioned that there are other factors that go into brain fog. I do wish you linked the sources at the end of your answer so it would be easier to see where you got the information from.
by Novice (560 points)
0 0
This factcheck is very detailed however, I wish there was a link to the more trustworthy .org site you mention.
by Novice (620 points)
0 0
Really appreciate your research on this topic i wish there was further research on this topic since as a college student i find it very interesting that Celsius can have such big effects on you will be doing some further research of my own!
by (180 points)
0 0
I appreciate your use of direct quotes from a credible source instead of just listing a source with no context. I found this to be a beneficial and insightful response. Also, adding a non-profit health organization was a good choice to include.
by (140 points)
0 0
I enjoyed reading your factcheck, it was very detailed to what causes brain fog and that while caffeine does have ties to brain fog and lack of sleep, the title was clickbait. your use of source was also very beneficial for the information provided and used well throughout the factcheck.
ago by Newbie (260 points)
0 0
This is a good fact check! You did a great job showing how the headline doesn't really match what the sources say. I like that you checked out the Vail Health site and you pointed out it's a .org, so it's reliable. You explained the link between caffeine, sleep and  hydration really well too which makes the fact check feel more balanced.
2 like 0 dislike
by Newbie (340 points)

In the article quoted for this claim, the conclusion of the study proves that the claim to be true but that the headline is clickbait. In the article it states that caffeine does have an effect on brain fog proven as well as ability to sleep and anxiety from studies done Vail Health. "Vail Health does recommend following an overall nutritious diet because blood sugar swings can cause inconsistent brain fuel, thus resulting in brain fog". Cleveland Clinic came to a similar conclusion, "The more caffeine you consume, the more likely you are to experience negative side effects, including neurologic and cardiac issues and even death". Clearly caffeine has negative side effects but nowhere in any of these studies does it specifically say anything about Celsius, which means that this headline is clickbait.

Exaggerated/ Misleading
by Newbie (280 points)
0 0
Something I appreciate about this comment is the last sentence concluding and summarizing the ideas of the claim and your fact check. It makes it very easy to understand what all the evidence you found means regarding the claim.
by Newbie (320 points)
0 0
This fact-check is very good because you linked all of your sources in an organized and easy to read way. I agree with your statement because brain fog is more linked to a person's overall health, not just their caffeine intake.
by Newbie (230 points)
0 0
I like how your fact-check is directly in a sense debunking the claim made by the user since it gets straight to the point of what was said. The quotes taken from some of the articles are also helpful in understanding what you are referring to.
2 like 0 dislike
by Novice (770 points)
The linked article talks about the effects of caffeine on the brain, including the brain fog that can come from drinking too much of it. This is technically true, though not directly. The article linked Vail Health's article on brain fog, which states that brain fog could be caused by something "as simple as not sleeping well, or as serious as low or high blood sugar in a person with diabetes." Lack of good sleep can be caused by ingesting caffeine, so to say that caffeine causes brain fog is not wrong, though it eliminates the other factors that effect the brain's ability to focus.

The writer of the original Live Strong article is a full time professional journalist who has a college education at the University of Maryland. The reviewer of the article is a registered dietition with experience in this topic. Both of these people seem qualified to speak on this topic, which aids in the articles credibility and reliability. Both sources that they cite (Vail Health and the Cleveland Clinic) are .org websites, which points to the fact that they're reliable, as well. In addition, other journalists/articles agree that, based on what we know, caffeine causes dehydration and sleepiness, which causes brain fog.

Though caffeine doesn't directly cause brain fog, it causes sleeplessness and dehydration, which is what causes brain fog. Drinking large amounts of Celsius would give a person brain fog because it would cause dehydration and limit their ability to sleep properly, which are both large factors in the creation of brain fog. And while not all brain fog can be linked to caffeine, there's a good chance that caffeine usage will indirectly cause brain fog.
True
by Novice (630 points)
0 0
I think your first paragraph makes a very good point. Often, we can look at something and see that it is technically true but also not take any time to think about the fact that there could be, as you say, "other factors" affecting the problem. When doing research, it is important to focus on all the factors. That way, we can try to see if there are any deeper areas to the problem at hand.
by Novice (560 points)
0 0
I appreciate your insight into the author of the article, it gives weight to the credibility of the article. The first paragraph also does a good job pointing out the fine details of the article that expose the clickbaity title of the article.
0 like 0 dislike
by Newbie (300 points)

The article that was linked talks about what brain fog is and some of the things that could attribute to it, like energy drinks such as Celsius.  In this article it also links a Vital Health page which is a more credible site, since it's a .org.  

In the Vital Health article it says, "Many times, treatment can be as easy as going to bed earlier, sleeping with oxygen (for sleep apnea), consuming less alcohol and caffeine, eating healthy food regularly and even drinking more water. Studies have shown dehydration contributes to poor brain function (kids who drank a few cups of water before a cognitive test did better than the control group), and in the High Country, it’s easy to become dehydrated."  So, the article does say that caffeine may be a cause in brain fog, however it does not say that Celsius is the main thing that causes it. 

While caffeine is most likely a cause in brain fog, another organization didn't even recognize it as an option.  Listing, "A lack of sleep, autoimmune conditions like lupus, multiple sclerosis and fibromyalgia, diabetes and low blood sugar levels (hypoglycemia), mental health conditions like anxiety or depression, neurodivergent conditions like ADHD and autism spectrum disorder, hormonal changes like during pregnancy or menopause, poor nutrition, stress."

Brain Fog: What It Is, Causes, Symptoms & Treatment

Caffeine is a cause in messing up your sleep and thus leading to brain fog, however this article is misleading in placing the blame on Celsius and caffeine alone.

Exaggerated/ Misleading
by Newbie (360 points)
0 0
I completely agree with your fact-check! This is a great way tp explain how the article linked is misleading and that the author's references are legitimate but don't refer to the main claim of celsius. Why not just refer to caffeine like you mentioned? Overall your fact check gives an understanding of what the majority are thinking when reading this article.
0 like 0 dislike
by Newbie (300 points)

The article on caffeine and brain fog raises some interesting points, but the main claim in the title is misleading. While it suggests a direct causal relationship between caffeine and brain fog, the complexities of this topic warrant a more nuanced discussion. The article accurately notes that caffeine can disrupt sleep patterns, citing research from the Journal of Clinical Sleep Medicine that shows caffeine consumed up to six hours before bedtime can significantly affect sleep quality, leading to increased fatigue and cognitive issues. However, the title implies that caffeine is the sole cause of brain fog, which oversimplifies the issue. The connection between brain fog and Chronic Fatigue Syndrome (CFS) is mentioned, but it’s crucial to highlight that brain fog is not a clinically recognized condition on its own, it is a symptom associated with various health issues, including CFS. This condition currently lacks a cause or treatment, making it misleading to solely attribute brain fog to caffeine consumption. 

by Novice (660 points)
0 0
Your answer is well-written and provides a detailed analysis of the linked article—well done! However, I think you could strengthen your argument by including perspectives from outside sources. Even though you dive deeply into the claims of the linked article, finding other articles or studies that support your analytical thoughts could make your point of view more credible. By only picking apart the linked article, your stance feels like it's lacking some evidence because it doesn't provide outside input from other experts.
by Newbie (280 points)
0 0
Your fact-check makes a very important point about the misleading claim in the title. This is a very good response, but the only thing I'd say to improve is emphasizing that brain fog is a system connected to many health conditions, not just caffeine. Adding one extra simple source that could focus on stress and nutrition would provide a more balanced view and can allow readers to understand the unfortunate complexities about brain fog.
0 like 0 dislike
by Newbie (220 points)
edited by
This article is misleading. While this article states that caffeine can lead to less sleep, which is supported by other trustworthy sources such as the NIH, it doesn't prove that caffeine directly leads to brain fog. Sleep-deprivation can lead to both "brain fog" and fatigue, but the article also explains how people can treat those symptoms by getting more "oxygen intake, drinking less caffeine", and other healthy habits before bed. The source also never actually mentions Celsius by name, and also doesn't explain if energy drinks are worse for your health than other caffeine products. There has been no evidence of safe use of Celsius causing health problems. According to Drink Reviews, Celsius has much more caffeine that an average can of redbull, which can put the average consumer at more risk if they don't know the ingredients.

https://pmc.ncbi.nlm.nih.gov/articles/PMC6230475/
by Novice (560 points)
0 0
I agree! This is a good fact check that examines the issues with the original claim. I think you could have benefitted from using a second source to further triangulate your data, but I like that you used a good .gov source for your response. I also think it is important to consider the quantity of caffeine that is considered unsafe or no longer healthy.
0 like 0 dislike
by Newbie (220 points)

This article claims that Celsius and other caffeinated drinks can lead to brain fog and fatigue.

This article provides links to other articles, which provide more factual information on this topic. They claim that while caffeine itself is not the direct cause of brain fog, it can contribute to sleep deprivation, which in turn can lead to symptoms of brain fog and fatigue. Dr. Dennis Lipton notes that brain fog can be alleviated by improving sleep quality and reducing caffeine intake. The articles links also state that research indicates that caffeine can disrupt sleep if consumed too close to bedtime. A study by Christopher Drake found that caffeine taken six hours before bedtime can significantly disrupt sleep.

Brain fog and fatigue are multifaceted issues with various contributing factors, including stress, poor diet, and lack of exercise. Caffeine is just an additive factor that can worsen these conditions.

The claim that Celsius and other caffeinated drinks directly cause brain fog and fatigue is misleading. While caffeine can contribute to sleep disruption, which may lead to brain fog and fatigue, it is not the sole cause. Improving sleep hygiene and reducing caffeine intake can help mitigate these symptoms. Therefore, the claim is partially true but is exaggerated/misleading and lacks context regarding the multifactorial nature of brain fog and fatigue.

The Balanced Nutritionist

NeuroLaunch

Exaggerated/ Misleading
by Newbie (220 points)
0 0
This is a great fact check. I like the way you walked through the steps on how people could associate Celsius with brain fog and fatigue. I also appreciate the way the you broke down the article that way linked in the claim.
0 like 1 dislike
by Novice (670 points)
I think expanding on your claim in the description box could be useful and beneficial to those before clicking on the article that you provided to provide a better understanding and strong stance to your claim that Celsius and or caffeinated drinks can lead to brain fog.

this could include talking about your opinion on Celsius and caffeinated drinks whether or not you have had them or not as well as maybe why you found this claim interesting or why you choose it to engage your readers as well as where you found this article and if its reliable or why we should look more into it as well as maybe including an article about what brain fog is and the effects it personally can cause on a person besides caffeinated drinks being involved.
by Novice (930 points)
0 0
This is a great point on the formatting of the original post, but I'm wondering if you have something to contribute to the fact checking in this thread. For instance, you might be able to link a source about what brain fog is and its common causes.
0 like 0 dislike
by Newbie (320 points)
edited by

In this article, Dylan Roche claims that caffeine is causing brain fog, but more accurately it affects other parts of your life that will have negative effects on your concentration and memory. Dylan Roche is a well-known author and journalist, and the site Live Strong is focused on setting examples of healthier lifestyles. Taking into consideration the purpose of this website, it makes sense if the effects of caffeine, specifically Celsius and coffee which already have negative reputations, were exaggerated to make a point. Roche mentions the limited stimulation but lasting effect caffeine has on your body, and how that can affect your sleep. An article published in the National Library of Health corroborates this argument, saying "The consumption of caffeine in response to insufficient sleep may impair the onset and maintenance of subsequent sleep". Although it's proven true, the study still doesn't legitimize the claim that caffeine causes brain fog, just that it can affect your sleep and in turn, the lack of sleep may make it hard to concentrate. 

https://pubmed.ncbi.nlm.nih.gov/36870101/ 

Exaggerated/ Misleading
by Newbie (250 points)
0 0
This fact check does a good job of supporting Roche’s argument with a credible source from the National Library of Health, which improves its validity. This connection between caffeine’s impact on sleep and potential cognitive effects adds additional reliability to the claim. However, you could be clearer of the fact that the study links caffeine to sleep disruption, not directly to brain fog, making the argument slightly overstated.

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