brain fog
noun
: a usually temporary state of diminished mental capacity marked by inability to concentrate or to think or reason clearly
Examples of brain fog in a Sentence
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Stories like Martinez’s are fueling interest in HBOT as a treatment for long COVID, a broad constellation of symptoms, including brain fog and debilitating fatigue that affects millions of people worldwide and has no clear remedy.
—
Clarissa Brincat, Scientific American, 1 June 2026
Try creatine for a brain boost 🕓 Creatine might not be the first supplement that comes to mind for brain fog.
—Abby Norman, Verywell Health, 1 June 2026
While menopause is biological, many of the symptoms associated with it, including sleep disruption, anxiety, mood instability, brain fog, and fatigue, can also be amplified by chronic stress and nervous system overload.
—Meggen Harris, Forbes.com, 31 May 2026
Night sweats, sleepless nights, brain fog; the search for relief has driven some to get creative in the drugstore aisle, combining daily antihistamines like Allegra or Claritin with antacids like Pepcid AC.
—Helen Carefoot, Flow Space, 29 May 2026
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Clarissa Brincat, Scientific American, 1 June 2026
Try creatine for a brain boost 🕓 Creatine might not be the first supplement that comes to mind for brain fog.
—Abby Norman, Verywell Health, 1 June 2026
While menopause is biological, many of the symptoms associated with it, including sleep disruption, anxiety, mood instability, brain fog, and fatigue, can also be amplified by chronic stress and nervous system overload.
—Meggen Harris, Forbes.com, 31 May 2026
Night sweats, sleepless nights, brain fog; the search for relief has driven some to get creative in the drugstore aisle, combining daily antihistamines like Allegra or Claritin with antacids like Pepcid AC.
—Helen Carefoot, Flow Space, 29 May 2026
See All Example Sentences for brain fog
Cite this Entry
“Brain fog.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brain%20fog. Accessed 7 Jun. 2026.
Copy CitationMedical Definition
brain fog
noun
: a usually temporary state of diminished mental capacity marked by inability to concentrate or to think or reason clearly
This brain fog can be a result of being overly stressed, tired, carrying extra weight, consuming too many calories or consistently consuming a diet poor in nutrients.—Kylie Helgens, The Gazette (Cedar Rapids, Iowa)
Kylie Helgens, The Gazette (Cedar Rapids, Iowa)Love words? Need even more definitions?
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