The Brain Doesn’t Like These 10 Things
Here’s how to make the brain happy to serve us better.

The brain, as the master conductor of our bodily orchestration and the host of the mind, holds immense significance for our survival and well-being. However, it has a unique taste, liking some things and disliking others, whether physiological or psychological.
Supporting the brain’s taste via healthy lifestyle habits reciprocates by enhancing our health and happiness. While distinct from our brains and minds as human beings, we are undeniably interconnected and reliant on the existence of the brain and mind.
The brain is a highly complex and resilient organ. Nevertheless, using many sensors, it is also sensitive to internal and external influences. Multiple factors can adversely impact its function and performance.
For the brain to operate at its best, it requires a stable and nurturing environment. Recognizing the potential threats that can compromise its well-being allows us to take proactive measures, enabling it to function optimally and serve us as a powerful ally.
Awareness of the brain’s needs is valuable in protecting our health and living a fulfilling life. By understanding what is unfavorable (disruptive) to the brain, we gain invaluable insights that can empower us to adapt our mindsets and behaviors to provide the necessary support. I aim to paint a high-level picture of those unfavorable things in this story.
Without going into scientific details, my checklist for brain health presents a condensed overview of extensive research from disciplines like neurobiology, cognitive science, psychology, psychiatry, endocrinology, and immunology, spanning decades of scientific studies. I also provide practical steps and tips to improve brain health and cognitive function.
1 — Sleep Deprivation and Lack of Rest
The brain needs sufficient and quality sleep and rests for optimal functioning. Too little or too much sleep can imbalance brain chemistry.
Inadequate sleep can alter brain activity, impair cognitive function (working memory, focus, attention, task switching, and problem-solving), dysregulate emotions, and lead to compromised judgment and increased health risks.
Sleep deprivation can disrupt hormonal and neurotransmitter balance, manifesting as increased irritability, moodiness, and a higher susceptibility to stress, anxiety, and depression. It can hinder decision-making and risk assessment, leading to poor judgments and an inclination toward unnecessary risks.
Chronic sleep deprivation and lack of rest can increase the risk of cardiovascular diseases, obesity, diabetes, weakened immune function, and mental health disorders, mainly due to hormonal dysregulation.
Prolonged sleep deprivation might also cause structural changes in the brain, resulting in reduced gray matter volume and an imbalance in neurotransmitters critical for proper brain function.
2 — Toxins and Pathogens
Toxins and pathogens threaten the brain, damaging neurons, and other neural components, disrupting their function.
They interfere with neurotransmitter systems, mitochondria, and cellular metabolism, leading to neuronal dysfunction or decay. Pathogens (viruses, bacteria, parasites, fungi) can invade brain tissues, causing inflammation, injury, or cell death.
These harmful substances can trigger oxidative stress, inflammation, and neuronal damage, increasing the risk of cognitive decline and neurodegenerative disorders.
Substance abuse and some medications might disrupt neurotransmitter systems, resulting in addiction and cognitive impairments.
Ethanol (alcohol), a neurotoxin, can damage neurons and disrupt neurotransmitter balance. It can induce structural and functional changes in the brain and cognitive impairments, increasing susceptibility to neurodegenerative diseases.
Smoking can reduce oxygen supply, constricts blood vessels, restricts blood flow, and causes oxidative stress. Long-term smoking might cause cognitive decline, stroke, and neurodegeneration.
Depending on the dose, the impact of toxic substances can range from mild impairments to significant changes in personality, mood, or motor function.
The brain has protective mechanisms to defend itself against toxins and pathogens. For example, the blood-brain barrier selectively allows substances to enter the brain, preventing harmful toxins and pathogens from freely accessing brain tissue.
When toxins or pathogens are detected, the brain initiates an inflammatory response to remove them. However, excessive and chronic inflammation might harm the brain like other organs.
3 — Sedentary Lifestyle and Excessive Workouts
A lack of physical activity can lower blood flow to the brain, limiting the delivery of oxygen and nutrients to neurons and connections, impairing vascular flexibility, and preventing neurogenesis, synaptic plasticity, and cognitive function.
A sedentary lifestyle might increase the risk of cognitive decline, anxiety, and mood disorders, reducing attention span and cognitive performance.
Physical inactivity might lead to cognitive decline and heighten the risk of neurodegenerative disorders. It puts the brain in decline mode preventing growth factors like BDNF production.
Lack of movement might limit dopamine release, affecting motivation and cognitive performance and increasing vulnerability to mood disorders.
Besides, sedentary behavior can increase insulin resistance and chronic inflammation, adversely impacting brain glucose utilization and contributing to cognitive decline.
Moreover, a sedentary lifestyle might contribute to brain atrophy, reduced gray matter volume, and compromised structural integrity, detrimentally affecting cognitive abilities.
Sedentary behavior can disrupt circadian rhythms, leading to poor sleep quality and impairing cognitive function.
The brain is not particularly fond of excessive workouts, which can induce undesirable oxidative stress and inflammation.
4 — Poor Nutrition, Inadequate Calories, Dehydration, Overeating
Poor nutrition and dehydration can harm the brain, compromising energy supply, and causing nutrient deficiencies, oxidative stress, inflammation, impaired neurotransmitter function, and structural changes.
The brain relies on glucose and ketones for energy, amino acids, essential fats, and micronutrients. Poor nutrition can lead to inadequate energy and nutritional deficiencies, degrading cognitive function.
Lack of essential nutrients might increase oxidative stress and inflammation, damaging neurons, and connective tissues, impairing neuronal function, and increasing the risk of neurodegenerative diseases.
Nutritional deficiencies might disrupt neurotransmitter production, affecting mood, cognitive function, and overall brain health.
Prolonged poor nutrition and dehydration can cause structural and functional changes in the brain. Malnutrition during developmental periods leads to permanent cognitive impairments.
Inadequate hydration can adversely affect brain function by compromising blood flow, disrupting cellular communication, and increasing stress hormone levels. Thus, inadequate hydration can adversely affect brain function, leading to cognitive deficits, reduced focus, lack of alertness, fatigue, and impaired memory.
Overeating, especially junk food, can harm brain function and performance due to its potential to induce oxidative stress, trigger chronic inflammation, and disrupt hormonal balance.
5 — Infections, Injuries, and Untreated Conditions
Infections, injuries, and untreated medical conditions can adversely affect the brain, leading to inflammation, neuronal injury, disrupted neural pathways, increased intracranial pressure, neurotransmitter imbalances, and progression of underlying conditions.
Injuries and infections can invade brain tissue, causing excessive inflammation, neuronal injury, and cell death. They can also disrupt the activities of neural pathways, impairing cognitive function and other brain-dependent processes.
Physical traumas can increase intracranial pressure, compressing brain tissue and affecting cerebral blood flow. This can lead to headaches, seizures, cognitive impairment, and brain damage.
Imbalances in neurotransmitters due to infections, injuries, and untreated conditions might result in cognitive impairments, neurological issues, and mood disorders.
Untreated chronic conditions can worsen over time, causing progressive damage to the brain. For example, hypertension can lead to vascular damage and increase the risk of stroke, impairing brain function.
When untreated, mental health disorders and traumatic brain injuries can adversely impact brain and cognitive function, neurotransmitter balance, emotional dysregulation, and behavioral issues.
6 — Excessive Oxidative Stress and Prolonged Chronic Inflammation
Excessive oxidative stress and chronic inflammation might harm the brain’s structure and function. Oxidative stress might happen when an imbalance between the amount of reactive oxygen species (ROS) and the counteractive antioxidant defense system happens.
The brain might be vulnerable to excessive oxidative stress due to its high oxygen consumption, lipid content, and low antioxidant defenses. ROS can initiate lipid peroxidation, damaging cell membranes and affecting neuronal signaling.
Excessive oxidative stress can damage proteins, impairing synaptic plasticity and neuronal pathways. ROS can damage DNA, causing neuronal impairment and increasing the risk of neurodegenerative disorders.
Prolonged activation of inflammatory pathways might lead to neuronal damage, impaired synaptic plasticity, and neurodegenerative activities. Too much stress and inflammation might damage brain cells, impair synaptic connections, and lead to structural changes in the brain.
Chronic inflammation can also cause excitotoxicity and harm the blood-brain barrier, allowing destructive substances and immune cells to enter the brain.
Activated glial cells can release pro-inflammatory molecules that might damage neurons and disrupt the function of neural circuits.
Chronic stress might decrease neurogenesis and increase the risk of mental health disorders. Systemic inflammation might increase the risks of cognitive impairments and neurodegenerative disorders.
7 — Hormonal Imbalances
Hormonal imbalances can adversely affect brain function and cognitive health through mechanisms like neurotransmitter dysregulation, mood disturbances, cognitive impairments, altered stress response, disruptions in neurogenesis and synaptic plasticity, and sleep disturbances.
The brain relies on proper hormone regulation for optimal functioning, as hormones play vital roles in mood regulation, energy balance, cognitive function, and overall brain health.
Stress hormones (cortisol, epinephrine, norepinephrine) manage stress responses. Chronic stress and hormonal imbalances can dysregulate the endocrine glands, HBA Axis and Brain-Gut Axis, affecting cognitive function and performance.
Hormonal imbalances of cortisol and melatonin can interfere with sleep regulation, negatively affecting brain health, cognition, mood, and overall brain functioning.
Imbalances of sex hormones associated with menopause or andropause can contribute to cognitive decline, memory problems, and mood swings.
Problems with metabolic hormones like insulin, glucagon, adiponectin, and leptin can adversely affect energy balance and make the brain unhealthy.
8 — Lack of Intellectual Stimulation, Novelty, and Variety
The brain does not like boredom. It thrives on intellectual stimulation, novelty, and variety. They encourage neuroplasticity, synaptic plasticity, enhanced learning and memory, dopamine release, and cognitive reserves.
Routine and limited exposure to new experiences can hinder cognitive stimulation and brain health.
Engaging in intellectually stimulating activities like reading and writing, playing musical instruments, trying novel approaches at work, and welcoming variety support brain health, cognitive function, and overall well-being. They prevent boredom and mental stagnation.
Lack of mental stimulation puts the brain in decline mode. However, regular intellectual challenges, like problem-solving, learning new skills, playing mind games, and staying socially active, can put the brain in growth mode, increasing neuroplasticity (BDNF) and cognitive flexibility.
People engaging in mentally stimulating activities have reduced cognitive decline risk and improved performance.
9 — Rumination, Negative Self-Talk, Self-Sabotage, and Loneliness
Rumination is the process of excessive and repetitive thinking about negative experiences or problems without finding a resolution. It involves dwelling on distressing thoughts and can be associated with conditions like depression and anxiety.
The brain does not like it because it increases energy utilization and creates excessive stress. Thus, overthinking can harm cognitive function, intensify negative emotions, interfere with problem-solving, and increase the risk of mental health disorders.
Negative self-talk reflects the habit of engaging in pessimistic internal dialogue, self-critical, and self-defeating conversations. It can strengthen adverse neural pathways and weaken positive ones. This decline might lead to additional cognitive biases toward negative thinking and pessimism.
This thinking pattern can adversely impact the brain by changing its biochemicals (neurotransmitters and hormones). Negative self-talk is related to cognitive distortions. It can trigger the release of stress hormones. Excessive cortisol might have damaging effects on brain chemistry.
Self-sabotage is driven by cognitive distortions like negative beliefs, perfectionism, unpleasant emotions (fear and anxiety), faulty memories, bad experiences, and behavior contributing to self-defeating patterns.
Loneliness might adversely affect the neurochemistry and neurobiology of the brain. This paper states, “Loneliness is associated with increased morbidity and mortality.”
The limbic system (the emotional part of the brain) craves relationships and connections with others. Social isolation might cause changes in the brain’s structures and functions.
MRI scans show the effects of loneliness noticeable in various brain regions responsible for stress response, cognitive processing, and emotional regulation.
10 — Unpleasant Emotions
The brain does not like too much unpleasant emotions because they can harm its functioning. When unpleasant emotions (anxiety, anger, fear, sadness, boredom) persist, they can activate physiological and psychological mechanisms like stress that can negatively impact the brain.
Unpleasant emotions can activate the limbic system, particularly the amygdala, a brain region that processes emotions and generates fear, anxiety, and stress responses.
When unpleasant emotions are experienced for a long time, the brain triggers excessive stress hormones. Chronic or prolonged exposure to stress hormones can lead to structural changes in brain regions (neocortex) responsible for memory, learning, decision-making, impulse control, and emotional regulation.
Too many unpleasant emotions can lead to cognitive overload, where the brain becomes overwhelmed by negative thoughts and emotions. This overload can impair cognitive function, impacting the health of neurons and neurocircuits.
Additionally, negative emotions can create a cycle of rumination and negative self-talk, further reinforcing and intensifying unpleasant emotions, leading to a continuous negative impact on cognitive function.
10 Takeaways for Better Brain Health and Cognitive Function
1 — Get adequate and restorative sleep nightly, take breaks at work, get sufficient rest, recover from workouts, and try breathing and progressive muscle relaxation. The brain needs three types of rest.
2 — Move the body joyfully and try aerobic and anaerobic workouts for at least 150 minutes weekly. The brain needs four types of exercise.
3 — Avoid environmental toxins, pathogens, recreational drugs, unnecessary medication, smoking, and excessive alcohol.
4 — Consume adequate calories and get essential nutrients from whole foods. Try time-restricted eating to create alternative energy for the brain and activate autophagy and mitophagy.
5 — Lower stress, anxiety, and inflammation with healthy lifestyle habits and mindfulness practices like meditation, yoga, visualization, laughter, music, and flow state.
6 — Balance your hormones and neurotransmitters by meeting fundamental body requirements. Get checked and obtain timely support to optimize hormones when you notice dysregulation symptoms.
7 — Stimulate the brain via intellectual pursuits, intuition, engaging in new hobbies, traveling, and gaining new knowledge, skills, and diverse experiences.
8 — Refrain from rumination, negative self-talk, cognitive distortions, and self-sabotage. Focus on self-care, self-compassion, and self-love.
9 — Regulate emotions by observing, acknowledging, and expressing them timely. Try self-therapy and professionally guided therapy like CBT.
10 — Address loneliness by improving relationships and meaningful social connections. Don’t hesitate to ask for help from loved ones and professionals when needed.
Thank you for reading my perspectives. I wish you a healthy and happy life.
As a new reader, please check my holistic health and well-being stories reflecting my reviews, observations, and decades of experiments optimizing my hormones and neurotransmitters.
ALS, Metabolic Syndrome, Type II Diabetes, Fatty Liver Disease, Heart Disease, Strokes, Obesity, Liver Cancer, Autoimmune Disorders, Homocysteine, Lungs Health, Pancreas Health, Kidneys Health, NCDs, Infectious Diseases, Brain Health, Dementia, Depression, Brain Atrophy, Neonatal Disorders, Skin Health, Dental Health, Bone Health, Leaky Gut, Leaky Brain, Brain Fog, Chronic Inflammation, Insulin Resistance, Elevated Cortisol, Leptin Resistance, Anabolic Resistance, Cholesterol, High Triglycerides, Metabolic Disorders, Gastrointestinal Disorders, Thyroid Disorders, Anemia, Dysautonomia, cardiac output, and urinary track disorders.
I also wrote about valuable nutrients. Here are the links for easy access:
Lutein/Zeaxanthin, Phosphatidylserine, Boron, Urolithin, taurine, citrulline malate, biotin, lithium orotate, alpha-lipoic acid, n-acetyl-cysteine, acetyl-l-carnitine, CoQ10, PQQ, NADH, TMG, creatine, choline, digestive enzymes, magnesium, zinc, hydrolyzed collagen, nootropics, pure nicotine, activated charcoal, Vitamin B12, Vitamin B1, Vitamin D, Vitamin K2, Omega-3 Fatty Acids, N-Acetyl L-Tyrosine, and other nutrients.
Disclaimer: My posts do not include professional or health advice. I only document my reviews, observations, experience, and perspectives to provide information and create awareness.
Thank you for reading my perspectives. I wish you a healthy and happy life.
As a new reader, please check my holistic health and well-being stories reflecting my reviews, observations, and decades of experiments optimizing my hormones and neurotransmitters. I write about health as it matters. I believe health is all about homeostasis.
ALS, Metabolic Syndrome, Type II Diabetes, Fatty Liver Disease, Heart Disease, Strokes, Obesity, Liver Cancer, Autoimmune Disorders, Homocysteine, Lungs Health, Pancreas Health, Kidneys Health, NCDs, Infectious Diseases, Brain Health, Dementia, Depression, Brain Atrophy, Neonatal Disorders, Skin Health, Dental Health, Bone Health, Leaky Gut, Leaky Brain, Brain Fog, Chronic Inflammation, Insulin Resistance, Elevated Cortisol, Leptin Resistance, Anabolic Resistance, Cholesterol, High Triglycerides, Metabolic Disorders, Gastrointestinal Disorders, Thyroid Disorders, Anemia, Dysautonomia, cardiac output, and urinary track disorders.
I also wrote about valuable nutrients. Here are the links for easy access:
Lutein/Zeaxanthin, Phosphatidylserine, Boron, Urolithin, taurine, citrulline malate, biotin, lithium orotate, alpha-lipoic acid, n-acetyl-cysteine, acetyl-l-carnitine, CoQ10, PQQ, NADH, TMG, creatine, choline, digestive enzymes, magnesium, zinc, hydrolyzed collagen, nootropics, pure nicotine, activated charcoal, Vitamin B12, Vitamin B1, Vitamin D, Vitamin K2, Omega-3 Fatty Acids, N-Acetyl L-Tyrosine, and other nutrients.
Disclaimer: My posts do not include professional or health advice. I only document my reviews, observations, experience, and perspectives to provide information and create awareness.
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