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List of Vitamin for Brain Fog

January 22, 2023
List of Vitamin for Brain Fog

Do you wake up in the morning feeling sluggish and unfocused? Is it hard to concentrate on anything, no matter how much caffeine you've had? If this sounds familiar, you might suffer from brain fog - an unfortunately common issue that can significantly impact your day-to-day life.

Believe it or not, there are ways to fight back against brain fog. Vitamins for brain fog may provide some relief if taken regularly. So, let us look at what these vitamins do and how they can help reduce the effects of this mental fog.

Vitamin C

Vitamin C is well-known for its contribution to immune health. This mineral supports many other essential bodily processes, such as brain functioning.

Research involving 80 healthy people revealed that those with appropriate blood levels of vitamin C performed much better on memory, attention, response speed, and concentration tests than those with low vitamin C levels.

Vitamin C insufficiency is connected to depression and cognitive impairment. Low vitamin C levels may also have a detrimental effect on mood. In a study of 139 young men, increased vitamin C levels were related to better mood and decreased incidences of sadness and bewilderment.

Moreover, recent research reveals that vitamin C administration may improve mood in individuals with subclinical depression. Thus, enhancing cognitive function and minimizing depression-related brain fog.

Vitamin D

Vitamin D is a fat-soluble mineral essential for the immune system and brain health, among other functions. Vitamin D deficiency may significantly affect cognitive health and lead to brain fog symptoms.

People with depression often suffer signs of brain fog, such as concentration and memory difficulties.

People with depression are also more prone to suffer dietary deficiencies, particularly vitamin D. A shortage in vitamin D is linked to an increased incidence of depressive symptoms. Vitamin D pills may relieve depression symptoms, including brain fog.

Other studies indicate that vitamin D administration may enhance mental health, including mood, negative thoughts, anxiety, and depression symptoms. This shows that vitamin D supplementation may at least partially reduce brain fog.

In addition, small research of 42 postmenopausal women with low vitamin D levels revealed that those who took 2,000 IU of vitamin D per day for one year did better on learning and memory tests than those who received 600 IU or 4,000 IU dosages.


L-theanine is an amino acid abundant in green tea and other plants. Several studies show that taking an L-theanine supplement might enhance mental acuity, response quickness, and memory.

Recent research, including 69 people aged 50–69, indicated that a single dosage of 100.6 mg of L-theanine enhanced cognitive performance on reaction speed and working memory measures.

L-theanine supplements may also alleviate stress and promote tranquility and relaxation. Moreover, small research discovered that 200 mg of L-theanine per day reduced stress-related symptoms and improved sleep and some aspects of cognitive health compared to a placebo. Reducing stress, enhancing sleep quality, and bolstering mental health may alleviate brain fog.

Vitamin B 

Supplementation with B6, B9 (also known as folate), and B12 vitamins have improved memory function and cognition. A 2021 research published in The Journal of Nutrition, Health & Aging indicated that male volunteers with a B12 deficit had impaired memory and attentiveness. 

According to research published in 2020, 84 percent of individuals with B12 insufficiency who took B12 supplements reported improved cognitive impairment symptoms. Ongoing research indicates that folate and other B vitamins may also have the ability to halt the progression of brain shrinkage in older persons.


raw salmon

Omega-3 fatty acids are well recognized for their remarkable health benefits. Concentrated omega-3 supplements may enhance brain health and specific symptoms of brain fog, such as focus and memory issues.

The omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) may promote brain function, including memory, attention, and mood.

Compared to a placebo, supplementation with 1.16 grams of DHA per day for six months improved episodic and working memory in a trial including 176 people with poor omega-3 consumption.

Another research revealed that therapy with 2.5 grams of omega-3 fatty acids per day prevented memory deterioration in lonely persons over four months. Omega-3 supplements may also relieve depressive symptoms and promote mood, which may help lessen brain fog symptoms.

An analysis of 26 trials revealed that taking omega-3 supplements with EPA concentrations of at least 60% and at a dose of at least 1 gram per day may aid in treating depressive symptoms.

Additionally, omega-3 supplementation may reduce anxiety symptoms. Because anxiety may severely impact mood, focus, and memory, people who experience anxiety may report brain fog symptoms. 


Your magnesium tank might deplete if you consume enough greens, nuts, seeds, beans, and whole grains. Magnesium deficits have been related to brain fog, moderate cognitive impairment, and dementia. Preliminary animal studies suggest magnesium may play a role in learning and memory. 

Why Does Brain Fog Occur?

Brain fog may be the consequence of neuroinflammation or inflammation of the brain. These include exhaustion, stress, burnout, depression, lack of sleep, dehydration, prolonged standing, some medical issues, drugs, hormone imbalances, poor nutrition, food allergies, and even long-term COVID.

Other Methods to Eliminate Brain Fog

Brain fog may be caused by various circumstances, including vitamin shortages, sleep deprivation, stress, and undetected medical conditions. Consult a healthcare expert if you suffer from memory issues, trouble concentrating, and an inability to comprehend information.

They may conduct tests to help you determine your symptoms' cause.

For instance, illnesses such as Hashimoto's thyroiditis, celiac disease, and anxiety problems might manifest as brain fog symptoms.

In addition, dementia and Alzheimer's disease may manifest with brain fog symptoms, including forgetfulness and trouble processing information.

If an underlying medical problem leads to brain fog symptoms, it is crucial to have an appropriate diagnosis and treatment. Certain lifestyle choices might also contribute to brain fog symptoms.

Lack of sleep, a diet heavy in ultra-processed foods, and excessive alcohol use have all been related to memory loss, difficulties focusing, depressed symptoms, and other cognitive impairments that some individuals may characterize as "brain fog."  

Multiple causes may be contributing to your brain fog, so it is essential to engage with a medical practitioner to determine the root cause of your symptoms and develop a treatment strategy.

Final Thoughts

vitamin with oranges

With the hectic pace of life, it is understandable that we need extra brain support from time to time. Vitamin C, D, and Magnesium can effectively reduce brain fog and get you back on track. Why not try them out and tell us how they worked for you? 

Everyone has their own unique experience with brain fog. Some people find that staying well hydrated helps. Try to find what works best for you! 

We would love to hear your stories. Your story could inspire someone who needs help facing their foggy mental situation. Let's work together to create a community where helping each other means no one has to fight against brain fog alone!

* All the information and content in this blog post are intended for informational purposes only. It should not be a substitute for professional or medical advice. You should always speak with a licensed professional before you follow anything you read in this blog post.

The information is provided by By Hilda Wong. While we try to keep the information up to date and correct, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability, or availability with respect to the website or the information, products, services, or related graphics contained on the post for any purpose.

Dr. Hilda Wong, MD

My name is Dr. Hilda Wong, MD, graduated from Avalon University School of Medicine. I have over 5 years of medical externship experience and a published researcher on PubMed. I'm also a health and nutrition enthusiast and have written several blogs and magazines in these areas. Forgot to mention that I own a Toy Australian Shepherd and a Betta Fish, and have an amazing zest for life, fashion, health, nutrition, and pets.

Dr. Hilda Wong, MD