Why Can’t I Focus? 8 Root Causes of Brain Fog and Poor Attention

This article has been updated (May 2026) to reflect emerging insights on the links between nervous system regulation, connection, and cognitive health.

In this article, you’ll learn the most common factors that contribute to poor focus and attention. You’ll also discover how these issues are connected—and how a holistic, functional, and naturopathic approach to brain health can help relieve brain fog and support optimal cognitive function.

Table of Contents

1. Three Reasons Why We Need to Pay Attention to Brain Health
2. The Interconnected Nature of Brain Fog and Focus Issues
3. Our Fast-Paced Distracted Society
4. 8 Reasons You Can’t Focus
   • Stress, Overwhelm, and Brain Fog
   • Poor Sleep Quality
   • ADHD & ADD
   • Hormonal Imbalances
   • Gut-Brain Axis Disruptions
   • Brain Fuel: Nutrition & Movement
   • Lack of Clear Priorities
   • Medication & Environmental Exposure Burden
5. Why You Still Can’t Focus: The Missing Relational Regulation Factor
6. Essential Oils for Boosting Focus and Brain Power
7. Focusing In on Why You Can’t Focus: A Summary
8. Closing Thougts
9. FAQs

 

Three Reasons Why We Need to Pay Attention to Brain Health

I’ve been exploring brain and mental health more deeply in recent articles on the foundations of wellness and previous posts on clinical insights. This focus comes down to three key reasons:

1. We are in the midst of a mental health crisis, and psychiatric diagnoses are increasing in our youth at an alarming rate.
2. The solutions our society has been given for this acceleration of emotional distress have often been limited to increasing access to interventions that do not adequately address underlying causes.
3. There still exists a mental health stigma that brain-based disorders are related to personality defects or a lack of willpower. This is just not true.

If we want to change this trajectory, we must do things differently.

Our society has come to a turning point where we need to refocus psychiatric and neurological care on integrative brain health treatments. This requires a broader shift toward more holistic, prevention, and personalized-focused models of care that prioritize identifying and addressing the underlying drivers of brain imbalances.

 

The Interconnected Nature of Brain Fog and Focus Issues

Difficulty with focus—whether it shows up as brain fog, poor concentration, or low mental stamina—is rarely caused by a single factor. Instead, it usually reflects interconnected factors, including nervous system balance, sleep quality, stress, hormones, inflammation, gut health, nutrient status, lifestyle habits, and environmental overload.

From a naturopathic and functional medicine perspective, these symptoms arise from overlapping networks across physiology, psychology, behavior, and environment. This means that even when foundational areas like nutrition, movement, and mindset are addressed, focus can still suffer if underlying systems aren’t fully aligned or personalized.

Rather than viewing attention difficulties in isolation, it is more useful to identify the shared root patterns that influence cognitive clarity and performance. These factors often interact, meaning multiple aspects may need support simultaneously.

In this clinical overview, I’ll highlight eight common contributors to disrupted focus to help you better understand what may be driving your brain fog. In the next article, I’ll explore how essential oils can be used as a supportive tool within this broader context.

 

Our Fast-Paced, Distracted Society

One of the most obvious reasons it’s hard to focus isn’t biological, but it deserves a mention. It’s our fast-paced society. There are so many things vying for our attention. Besides everyday stressors, disturbing global events, countless social media notifications, and various forms of technology bombard us on a day-to-day basis. It’s challenging for our brains to handle this overload and makes it hard for it to weed out distractions versus serious threats.

For this reason, being mindful of how much content we are taking in through social media and technology should be a consideration for what is contributing to our brain symptoms, including attention and mood. This should be in addition to all other main physiological players.

 

Eight Reasons Why You Can’t Focus and Concentrate

 

1. Stress, Overwhelm, and Brain Fog

The stress and overwhelm that results from the demands of our modern world are probably the most common reasons for the inability to focus or concentrate.

Being in a constant state of urgency can impact brain processing and cognitive functioning. In fact, it literally causes functional changes in the brain! Chronic overwhelm is linked to an enlargement of the “fight and flight” area (the amygdala) and shrinkage of the memory center (the hippocampus).

A bombardment of emotional triggers can also “shutdown” the area of the executive function, the prefrontal cortex (PFC). These shifts in brain function make rational decision-making, planning, organization, focus, and follow through more difficult.

All these effects result in negative thinking and “brain fog.” Hence the expression, “stress makes you stupid.”

 

2. Poor Sleep Quality

Sleep is important for many reasons. For the brain, sleep aids in:

• memory consolidation
• forming neural pathways for integrating new information
• cleansing via the glymphatic system– the “brain detox” system which aids in the removal of “neurotoxic substances” and enhances circulatory and lymph flow
• providing mood support, healing, rejuvenation, and energy

Our society has been trading busyness for sleep for too long. The result is less brain power to be productive during the day.

 

3. ADHD (Attention Deficit & Hyperactivity Disorder) & ADD (Attention Deficit Disorder)

People with ADHD and ADD have distinct brain patterns that make it hard for them to focus. Dr. Amen, a renowned psychiatrist, has classified seven types of ADHD/ADD, each with their own complex brain patterns. One commonly shared pattern among all of them is overactivity in the prefrontal cortex (PFC).

When people with ADD/ADHD try to concentrate, PFC activity decreases rather than increases. This is why being told to “try harder” or “focus more” usually makes the problem worse for those with ADHD/ADD.

Assessing the causes and balancing the brain patterns is essential for those struggling with ADD/ADHD. * This can be accomplished with neurotransmitter and supplement recommendations, gut-brain support, nutritional interventions, lifestyle, and essential oils.

*Note: Irlen syndrome is a visual processing problem where certain colors of the light spectrum can irritate the brain. It can be confused for ADD and often co-occurs with it. This syndrome should be considered in those with ADHD/ADD and who have difficulty reading. Learn more here.

 

4. Hormonal Imbalances

Stress impacts hormones and hormones influence brain neurotransmitters. For example, there is evidence that thyroid hormone plays a role in dopamine output, a key signaling molecule for focus. Furthermore, serotonin interacts with estrogen and progesterone with GABA. Correcting hormonal imbalances will therefore support brain signaling patterns.

 

5. Gut-Brain Axis Disruptions

Oftentimes, addressing gut issues will improve mental and cognitive symptoms. This is due to the intricate bidirectional relationship of the gut-brain axis.  Our gut and brain message each other via several routes. These include:

1. the immune system (our gut houses over 70% our immune system which has an impact on our brain and neurological processes)
2. tryptophan metabolism (the precursor to the “feel-good” neurotransmitter, serotonin)
3. the vagus nerve (a nerve extending from our brain and into our GI tract. It is akin to a gut-brain “highway” that “transports” communication via signaling molecules.)
4. the enteric nervous system (the neurons and supporting cells of the gut that influence systemic processes)
5. metabolites of microbes that act as signaling molecules and effect health outcomes, such as short-chain fatty acids (SCFAs), branched-chain amino acids, and peptidoglycans (components of the bacterial cell wall)

If you feel your gut may need a little TLC so your brain can function better, my naturopathic and functional medicine guide on the gut-brain axis can be found here.

 

6. Brain Fuel: Nutrition & Movement

Not providing the brain with the nutrients it needs can impact mental clarity, mood stability, and overall cognitive function. The brain relies on a steady supply of key nutrients—such as omega-3 fatty acids, B vitamins, amino acids, and minerals—to support neurotransmitter production, energy metabolism, and healthy neural communication. This is especially relevant for individuals following highly restrictive or elimination diets, where nutritional adequacy may be unintentionally compromised.

Fluctuations in blood sugar can also lead to shifts in energy, focus, and cognitive steadiness. The brain is highly sensitive to glucose availability and rhythm. Research suggests that both low blood sugar (hypoglycemia) and high blood sugar (hyperglycemia) can affect attention, memory, and executive function, even in the short term. Greater variability in blood sugar levels has also been associated with reduced cognitive performance and changes in brain network function. Maintaining more stable glucose levels appears to support more consistent cognitive performance, which is why long gaps without food or large, heavy meals may contribute to reduced mental clarity.(Source, Source, Source, Source)

In addition, regular physical movement supports healthy blood flow, delivering oxygen and nutrients to the brain and helping maintain optimal neurological function.

 

7. Lack of Clear Priorities

When we are unclear about our values or struggle to accept our current situation, it’s easy to become stressed and fixated on problems. Instead of focusing on what needs attention most, we get sidetracked by less important concerns. This pattern may reflect emotional dysregulation, cognitive overload, or deeper imbalance in the stress response system.

By becoming more mindful of our responses and staying present, we can better recognize what truly needs attention in the moment.

 

8. Medication & Environmental Exposure Burden

Certain medications—including anti-anxiety drugs, antihistamines, and some cardiovascular medications—can affect memory, attention, and overall cognitive function. If you suspect a prescription may be contributing to your symptoms, speak with your prescribing provider before making any changes.

Environmental exposures, including household chemicals, heavy metals, and other toxins, can also impact brain health. These influences share a common pathway in the body, often contributing to oxidative stress, neuroinflammation, and changes in neurotransmitter balance.

Over time, this combined “exposure burden” may place additional strain on cognitive function.

If you suspect environmental exposures are contributing to your symptoms, you can explore my Naturopathic Detox Guide.

 

Why You Still Can’t Focus: The Missing Relational Regulation Factor

If you’ve been struggling with focus, mental clarity, or attention, you may have already explored common factors like sleep, nutrition, hormones, or neurotransmitter balance.

While these are important, they don’t explain the full picture.

One of the most overlooked influences on attention is the nervous system—and how it is regulated through connection.

When the body feels safe, the nervous system supports higher-level brain functions like focus, memory, and cognitive flexibility. Supportive relationships, emotional attunement, and a sense of connection help create this state.

When there is chronic stress, disconnection, or emotional isolation, the nervous system tends to stay in a more protective mode. In this state, the brain prioritizes scanning for threat over sustained attention. Focus becomes harder to maintain, mental fatigue builds more quickly, and thinking feels fragmented.

The heart and brain are in constant communication through the autonomic nervous system. Emotional experiences influence heart rhythms and physiological patterns, which in turn send signals to the brain that shape mood, clarity, and resilience.

This suggests that focus challenges are not only cognitive in nature, but also influenced by emotional state and relational safety, requiring a more integrated approach.

 

Essential Oils for Supporting Focus and Brain Function

Essential oils offer a unique way of interacting with the brain because they don’t target just one pathway at a time. Instead, they can simultaneously influence stress physiology, mood regulation, autonomic balance, and neural signaling through the olfactory system and limbic brain networks.

Now that we’ve explored how focus is shaped by interconnected systems—nervous system state, emotional regulation, and environmental inputs—it becomes easier to see how essential oils may fit into this picture. Rather than addressing one isolated factor, they can help support multiple aspects of brain function at once.

In Part II, I’ll explore specific essential oils for focus and cognitive support, and how they may be used within this broader systems-based approach.

 

Focusing In on Why You Can’t Focus: A Summary

To summarize, there are eight main contributors to difficulty with focus. These include stress and overwhelm, poor sleep, attention disorders such as ADD/ADHD, hormonal imbalances, gut dysfunction, inadequate brain nutrition, lack of clear priorities, and medication or environmental exposures.

In addition, the role of the nervous system—and the influence of connection—expands this understanding beyond symptom management toward restoring the conditions that support optimal brain function.

Essential oils can be one helpful tool in this picture, supporting different aspects of brain and nervous system function at the same time.

 

Closing Thoughts

I hope this helped make sense of some of the reasons focus and attention can feel difficult, and gave you a sense that there are multiple ways to support improvement.

In my next post, I’ll explore practical tools—including essential oils—that can support focus by working with the nervous system, rather than against it. Stay tuned.

Feel free to share your thoughts below.

 

More Brain Health Resources

For additional information on supporting brain resilience, you can explore these guides:

• Brain-focused nutrition
• Movement as medicine
• Mindset as medicine
• Smell to rewire the brain

You can also access my Brain Health Supplement Protocol for targeted support.

 

Stay Connected

If you enjoy exploring topics related to brain health, nervous system regulation, essential oils, and integrative wellness, you can subscribe to my newsletter for future articles, research updates, and educational resources.

Coming soon: The Brain Health Reset

Join me and my renowned guest expert, where we’ll explore practical ways to support mental clarity, emotional resilience, and overall cognitive wellness.

 

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Resources

• Have Our Amygdalas Have Been Hijacked? The Mental Health Crisis in America and Why Psychiatric Care Needs Holistic Help (My article with references)
• Mind-Body Medicine: Naturopathic Doctors as Support Agents for Mental Health (My article with references)
• Integrative Resources for Mental Health, Emotional Balance, and Back-to-School Stress (My clinical tip with resource links)
• The Digital Hustle Is Hurting Our Teens | Opinion (Newsweek)
• Who Needs Sleep? Why We Sleep and How Slumber Can Benefit Your Brain, Hormones, and Whole Body (My article with references)
• Attention Deficit Disorder (ADD/ADHD) (Amen Clinics)
• Feeling Fatigued? My Favorite Herbs and Essential Oils to Boost Focus, Energy, and Cognition Health (Part 3: My Top Essential Oils for Attention, Mood, and Brain Vitality) (My article with references)
• Eight Reasons Why You Can’t Focus and Concentrate & Four Essential Oils to Help You Pay More Attention (My article with references)
• Essential Oils for Stress Relief and Mental Health: A Review (My clinical tip with references)
• Three Ways Essential Oils Support Brain Health for Better Mood, Memory, and Cognition: Part I (My clinical tip with references)
• A Naturopathic and Functional Medicine Approach to Supporting the Brain Using Essential Oils: Essential Oils for the Brain Part 2 (My clinical tip with references)
• Naturopathic Medicine and Essential Oils for ADHD with Dr. Stoychev, ND, RD (Ep. 388 of the EOR)
• Essential Oils for Hormones: Holistic Support for Healthy Estrogen, Progesterone, Testosterone, Thyroid, and Oxytocin Balance (My article with references)
• Your “Gut Brain” – Why You Need to Know About Your “Second Brain” and How it Influences Your Mood (My article with references)
• Caution: These Drugs Can Cause Memory Lose (AARP)
• PsychoAromatherapy: Using Essential Oils for Better Mental Health with Jade Shutes, World Renowned Clinical Aromatherapist (Ep. 405 of the Essential Oil Revolution)
• An Update: Do Essential Oils Harm Our Microbiome? (Ep. 394 of the Essential Oil Revolution)
• Irlen Screening (Amen Clinics)