Magazine · Energy and performance
Brain Like in a Fog: What Is Brain Fog and How Can You Regain Mental Clarity?
Adela Svobodova
· 9 minute read
Your to-do list is bursting at the seams, but your brain is reporting overcast skies. You read every paragraph at least three times, the right word keeps escaping you, and information you once would have grasped instantly now takes unusually long to process. Brain fog may not be an official diagnosis, but it can make life pretty difficult. How can you support your brain, and why isn't it working the way it used to?
In this article
What is brain fog?
Brain fog is a term for a subjectively perceived decline in cognitive functioning. Everyone may experience it a little differently. Some people struggle to stay focused, others forget what they wanted to say, and others feel that their thinking has slowed down or that they can't express themselves as quickly as usual.
Typical signs may include:
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Poorer concentration: Your thoughts wander easily, you can stay on task for shorter periods, and even simple tasks require more effort.
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Forgetfulness: You search for your keys more often, forget what you meant to do, or find it harder to recall information.
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Slower thinking: Processing information, making decisions or finding the right words takes you longer.
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Mental fatigue: After more demanding work, you feel as if you've used up all your capacity – sometimes as early as mid-morning.
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A sense of haziness: Your head feels “foggy” and your thoughts aren't as quick and clear as they used to be.
These signs often occur together and their intensity varies. Sometimes they appear only after a demanding day or a few bad nights; at other times they persist for weeks or months.
Why does the brain end up “in a fog”?
The brain doesn't function separately from the rest of the body. Its performance is affected by sleep, the hormonal environment, nutrition, psychological strain and overall health. Brain fog can therefore have one clear cause, but it can also be the sum of several seemingly minor factors. The most common suspects include:
1. Lack of sleep and poor recovery
During sleep, memories are consolidated, information is processed and processes important for the functioning of the nervous system are restored. When we sleep too little or our sleep is of poor quality, it can show up as reduced attention, slower reactions and more difficult decision-making.
Staying up late isn't the only problem. A long-term irregular routine, frequent waking or sleep apnoea can disrupt recovery, even if you seem to be spending enough time in bed.
2. Chronic stress and too many stimuli
Short-term stress can spur us on to better performance. But when we run at full throttle almost non-stop, it can lead to mental fatigue and a reduced ability to concentrate. Constantly switching attention between tasks, notifications, information overload and the feeling that we always have to be available leave us very little room for real rest.
So if you're struggling to keep your train of thought, remember new information or immerse yourself in a task that requires focus, you may have already exhausted your brain by scrolling through social media on your way to work.
3. Lack of energy and important nutrients
The brain needs a regular supply of energy and a range of micronutrients that contribute to its normal functioning. An overly low energy intake or a long-term unbalanced diet can contribute to fatigue and poorer concentration.
Problems with concentration and memory may be linked, for example, to a deficiency of vitamin B12. An iron deficiency, in turn, is associated with fatigue and reduced performance, which can also affect your ability to concentrate.
Laboratory tests can help confirm whether you're actually lacking a particular nutrient. The risk of certain deficiencies tends to be higher, for example, in people with a one-sided diet, a limited intake of animal foods or absorption disorders.
4. Hormonal changes and health problems
Brain fog may be related to hormonal changes, for example during pregnancy or during menopause. It also accompanies certain illnesses, including thyroid disorders, autoimmune diseases and conditions associated with chronic fatigue.
A separate chapter is so-called long COVID, in which problems with concentration, memory and information processing can persist even after the acute infection has passed.
If you suspect that a health problem is behind your symptoms, it's a good idea to discuss them with a professional.
5. Medications and other factors
Attention and mental sharpness can also be affected by certain medications, alcohol and other psychoactive substances. Always consult your doctor before changing your medication or adjusting the dosage. Addictive substances such as alcohol or drugs are, of course, best avoided altogether, or at least kept to a minimum.
How to get your head back in shape? Start with the basics
There is no universal pill for brain fog and no single approach that works for everyone. If a specific health problem or nutrient deficiency is behind your symptoms, that is what needs to be addressed. In everyday life, however, you can start with a few steps that support cognitive function and overall recovery.
Give your brain regular sleep
Try to go to bed and get up at roughly the same time. Most adults need around 7–9 hours of sleep, but its quality matters too. Limiting caffeine later in the day, a calmer evening routine and less screen light before bed can all help.
If you wake up unrefreshed, snore heavily or struggle with overwhelming sleepiness during the day, it's worth discussing your sleep quality with a professional.
Eat regularly and don't skimp on quality
The brain needs energy. Running on coffee and one quick meal a day in the long term isn't exactly the best idea. The foundation is a varied diet with enough protein, complex carbohydrates, healthy fats, vegetables, fruit and fibre.
Don't forget to drink regularly, either. Dehydration can worsen fatigue and your ability to concentrate, especially if you're already starting the day sleep-deprived or physically exhausted.
Move, but don't overdo it
Regular exercise supports the health of your brain and your whole body. It doesn't have to be intense training – sometimes a brisk walk, a short stretch or a few minutes outdoors between work blocks is enough.
But there's another side to the coin: if you've been exhausted for a long time, yet another intense workout usually won't do you any good. Learn to recognise when you need to recover, and don't consider rest a waste of time.
Limit multitasking and take breaks
The brain isn't built to process several demanding tasks efficiently at the same time. Frequently switching your attention between emails, messages, calls and unfinished work can heighten the feeling of mental overload.
Try to work in shorter, focused blocks, turn off unnecessary notifications and take a real break between tasks. Ideally one in which you don't simply swap your work monitor for your phone screen.
Pay attention to what's happening over time
If brain fog keeps coming back, notice when it is at its worst. Is it linked to lack of sleep, a demanding period at work, your menstrual cycle, food or perhaps a recent infection? Even observations like these can help uncover connections.
If your symptoms last several weeks, get worse or significantly limit your everyday functioning, make an appointment with your doctor. Depending on your symptoms and medical history, they may consider, for example, a blood count, iron or vitamin B12 levels, thyroid function or other tests. Sudden confusion, speech problems, weakness in a limb or other sudden neurological symptoms require immediate medical attention.
Can brain fog be tackled with diet and supplements?
If you regularly sleep only five hours a night, no capsule can replace sleep. However, if you know that the problem is caused, for example, by a vitamin B12 deficiency, it makes sense to address this deficiency specifically with high-quality supplements.
For long-term support, you can then look to substances that are scientifically studied in connection with brain health and cognitive function. These include:
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B vitamins – especially B6, B9 and B12, which contribute to the normal functioning of the nervous system and normal psychological function, and to the reduction of tiredness and fatigue. However, this matters mainly when your intake is insufficient. In someone who already gets enough of these vitamins, a higher intake won't automatically improve concentration.
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Phospholipids – mainly phosphatidylserine and phosphatidylcholine, which are components of cell membranes and play a role in their structure and function. A possible link between phosphatidylserine and memory and cognitive function is also being studied.
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Uridine, which is part of cell membrane metabolism and may play an important role in forming and strengthening new neural connections. In a study of healthy adult men, certain markers related to phospholipid synthesis in the brain increased after just one week of uridine administration.
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Taurine, a natural component of the nervous system. It is involved in osmoregulation, cell signalling and other physiological processes. Some studies also suggest a possible neuroprotective function, i.e. a role in protecting against neurodegenerative diseases.
When choosing a supplement, it therefore pays to look primarily at the specific composition and the amounts of the individual substances. Terms such as brain booster, nootropic or mental energy on their own say nothing about whether a product actually has proven effects.
TIP: One way to add substances associated with the functioning of the nervous system to your daily routine is to regularly take the comprehensive formula MindBoost. It contains no caffeine or conventional stimulants, so it isn't just another “shortcut” designed to suppress feelings of tiredness in the short term.
Brain fog isn't something you have to put up with
Everyone experiences the occasional slowdown or poorer concentration. But if the feeling of mental fog is becoming a regular part of your days, it's best not to ignore it. It may be a sign that you need more sleep, less stress, better eating habits or a medical check-up.
Start with the basics and look for connections. After all, the condition of our brain reflects how the whole body is doing.
