How does eating protein earlier in the day affect muscle growth compared to later in the day?

Studies in mice and humans show that ingesting quality amino acids, particularly leucine, early in the day (between 5 AM and 10 AM) leads to greater muscle hypertrophy than if the majority of protein is ingested later, due to the circadian clock gene BMAL in muscle cells.

What are the common symptoms and dangers of anorexia nervosa?

Anorexia nervosa is characterized by a failure to eat enough to maintain a healthy weight. Symptoms include loss of muscle mass, low heart rate, low blood pressure, lanugo, bone density loss, and disrupted gut/immune functions. It has the highest mortality rate of any psychiatric disorder.

Is anorexia caused by social media imagery or perfectionism?

While social media imagery might impact psychological well-being, data suggests anorexia rates have not increased in the last 400 years, indicating it is not primarily caused by modern media. Similarly, the idea that all anorexics are perfectionists is not supported by data.

How do mechanical and chemical signals contribute to hunger and satiety?

Mechanical signals come from the physical fullness or emptiness of the stomach, while chemical signals arise from nutrient levels in the blood, such as glucose and fatty acids, as well as hormones like leptin. These signals communicate with hypothalamic neurons to regulate appetite.

What is the evolutionary perspective on eating behavior presented in the podcast?

Dr. Casey Halpern suggests that from an evolutionary standpoint, it makes sense for humans to eat as often, as much, and as fast as possible due to historical food scarcity. Brain circuits reward this behavior, which can become problematic in modern times of food abundance.

How does the brain circuitry of anorexics lead to their eating habits?

Anorexics develop habits where avoiding high-fat, high-calorie foods is connected to a reward system, primarily involving the dorsal lateral striatum. Their brain is rewired to find reward in restriction, making it a reflexive behavior rather than a conscious choice to punish themselves.

What therapeutic approach is recommended for breaking habits in anorexia?

Habit breaking through self-awareness and cognitive behavioral therapy is crucial. This involves teaching individuals to recognize the internal cues and triggers preceding their habits, like weak central coherence (focus on details) and challenges in set shifting. Family-based models can also provide support.

How does the perception of self change in anorexics during recovery?

Anorexics often have a distorted self-image, seeing themselves as overweight even when severely underweight. Fortunately, as habits around food and exercise shift towards healthier behaviors, leading to healthy weight gain, their perception of self also tends to rewire and become more accurate.

What are key characteristics of bulimia and binge eating disorder, and how do they differ from anorexia?

Bulimia and binge eating disorder involve ingesting excessive calories, often in short periods, with bulimia including purging. Unlike anorexics, who are rewarded for restriction, bulimics often experience immense shame. These disorders are characterized by a lack of inhibitory control and impulsivity, a polar opposite to anorexia.

Which pharmacological treatments are effective for bulimia and binge eating disorder?

Drugs that increase serotonin, like fluoxetine (Prozac/Paxil), and those that increase dopamine and norepinephrine, such as Adderall, Vyvanse, and Bupropion (Wellbutrin), can be effective. These medications help increase prefrontal, 'top-down' control and reduce impulsivity.

What is deep brain stimulation, and how is it being used to treat binge eating disorder?

Deep brain stimulation (DBS) is an invasive FDA-approved procedure where a wire is placed into specific brain areas, such as the nucleus accumbens. Dr. Casey Halpern's research shows that DBS can counteract abnormal Delta oscillations in these areas, which are associated with hyper-rewarding perceptions of food, thereby treating binge eating disorder.

Why is it challenging to define 'healthy eating' with a single protocol?

Healthy eating is influenced by cultural, familial, and societal factors, individual biology, and personal values. What is considered 'healthy' can vary greatly and is difficult to standardize, making the focus shift to identifying unhealthy or disordered eating patterns.

How can one manage anxiety around food in an age of abundance?

Developing methods to calm oneself in the presence of anxiety-inducing stimuli, such as physiological sighs (inhaling through the nose, long exhale) and mindfulness meditation, can be beneficial before meals. The goal is to avoid approaching food in an anxious state.

Key Moments

Healthy Eating & Eating Disorders - Anorexia, Bulimia, Binging

Andrew Huberman

Science & Technology3 min read137 min video

Sep 6, 2021|569,988 views|13,776|1,069

andrew huberman huberman lab podcast huberman podcast dr. andrew huberman neuroscience huberman lab eating disorders bulimia anorexia binge eating

Save to Pod

Key Moments

TL;DR

Understanding hunger, satiety, and eating disorders like anorexia and bulimia, focusing on biological mechanisms and treatment approaches.

Key Insights

A balanced relationship with food is highly individual, with no single 'healthy eating' protocol applicable to everyone.

Protein intake is utilized more effectively for muscle synthesis earlier in the day due to circadian rhythms.

Anorexia Nervosa is the most dangerous psychiatric disorder, characterized by severe food restriction and often driven by biological factors rather than social media imagery.

Bulimia Nervosa and Binge Eating Disorder are characterized by impulsivity and a lack of inhibitory control, with different therapeutic targets than anorexia.

Understanding the brain's homeostatic and reward systems is crucial for comprehending and treating eating disorders.

Interventions for eating disorders should target the underlying neural circuitry, including habit formation, reward pathways, and self-perception.

THE COMPLEXITY OF HEALTHY EATING

Defining "healthy eating" is incredibly complex and varies significantly among individuals, influenced by culture, family, and personal beliefs. Nutritionists, doctors, and individuals all offer different perspectives, highlighting the absence of a universal protocol. While calorie intake versus expenditure remains a foundational principle for weight management, the nuances of individual metabolism, lifestyle, and psychological relationship with food are paramount. This personal variability underscores the challenge in establishing a one-size-fits-all approach to nutrition and emphasizes the need for personalized strategies.

CIRCADIAN RHYTHMS AND PROTEIN UTILIZATION

Recent research suggests that the timing of food intake, particularly protein, influences its utilization by the body. Studies in mice and humans indicate that amino acids, crucial for muscle protein synthesis, are better assimilated and contribute more to muscle hypertrophy and maintenance when consumed earlier in the day. This effect is linked to the circadian clock mechanism within muscle cells and the expression of clock genes like BMAL. While this doesn't mean avoiding protein later in the day, it suggests a strategic advantage for muscle health by prioritizing protein intake between 5 AM and 10 AM.

ANOREXIA NERVOSA: A BIOLOGICALLY DRIVEN DISORDER

Anorexia Nervosa, characterized by severe food restriction leading to significantly low body weight, is the most dangerous psychiatric disorder, with a high mortality rate. Contrary to popular belief, its prevalence has remained consistent for centuries, suggesting strong biological underpinnings rather than being solely caused by modern societal pressures like social media imagery. The disorder often emerges during adolescence, a period of significant hormonal and neural changes, and is associated with hormonal disruptions, including amenorrhea in women and reduced testosterone in men, impacting overall metabolic and endocrine function.

THE NEURAL BASIS OF ANOREXIA AND HABIT FORMATION

Research indicates that anorexia nervosa involves disruptions in habit formation and reward pathways. Anorexic individuals often exhibit a hyper-awareness of food's caloric and fat content, developing compulsive habits of restricting high-calorie foods and favoring low-calorie options. This isn't driven by conscious avoidance but by a reward system that reinforces these restrictive habits. Interventions focusing on identifying and rewiring these habits, combined with a strong understanding of self-perception and internal bodily states (interoception), show promise. Family-based approaches and cognitive behavioral therapy are crucial in supporting this habit reformulation.

BULIMIA NERVOSA AND BINGE EATING DISORDER: IMPULSIVITY AND REWARD

Bulimia Nervosa and Binge Eating Disorder are characterized by episodes of excessive food intake, often accompanied by purging in bulimia. These disorders are linked to impulsivity and a lack of inhibitory control, contrasting with the reward-driven restriction seen in anorexia. The underlying neural circuitry, particularly involving the prefrontal cortex and reward pathways like the nucleus accumbens, appears disrupted, leading to hyper-responsiveness to food cues and difficulty in stopping eating. Treatments often target this impulsivity by enhancing top-down control, utilizing medications that affect serotonin and dopamine, and exploring novel approaches like deep brain stimulation.

HARNESSING KNOWLEDGE FOR RECOVERY AND WELL-BEING

A unifying theme across discussions of healthy eating and eating disorders is the power of knowledge and neuroplasticity. Understanding the biological and psychological mechanisms underlying eating behaviors empowers individuals to make better decisions and initiate change. For those with eating disorders, recognizing how ingrained habits and reward systems influence behavior is the first step toward recovery. This knowledge can help rewire neural circuits, leading to healthier relationships with food and improved self-perception, underscoring that while the path to recovery is challenging, transformation is possible through informed intervention and sustained effort.

Mentioned in This Episode

●Supplements

●Software & Apps

●Companies

●Organizations

●Books

●Drugs & Medications

●Concepts

●People Referenced

Common Questions

Intermittent fasting involves restricting one's feeding behavior to a particular phase of the 24-hour cycle or not eating for extended periods. Benefits observed include improved liver enzymes and insulin sensitivity, though specific feeding windows vary by individual.

Topics

Intermittent Fasting Neuroscience & the Brain Nutrition & Diet Mental Health & Psychology Body Dysmorphia Muscle Protein Synthesis Cognitive Behavioral Therapy Eating Disorders Hormonal Regulation Anorexia Nervosa Bulimia Nervosa Binge Eating Disorder Brain Circuitry

Mentioned in this video

Books

Cell Reports

A Cell Press Journal where a new study on the timing of protein intake and muscle hypertrophy in mice and humans was published.

Concepts

EDNOS

A sub-categorization of eating disorders used for conditions that do not precisely meet the criteria for anorexia or bulimia.

Ventromedial prefrontal cortex

A brain area involved in reward-based decision-making and the drive to pursue specific foods or tasks.

cholesterol bypass

In anorexics consuming very little food, the liver may generate its own cholesterol to synthesize sex steroid hormones, often overshooting, leading to high (unhealthy) cholesterol levels in blood panels.

mTOR pathway

Mammalian target of Rapamycin, a pathway involving cell growth and muscle protein synthesis, influenced by amino acids like leucine.

OSFEDs

A classification of eating disorders that highlights specified feeding or eating disorders that do not fall into other criteria.

Dorsolateral Prefrontal Cortex

A brain area involved in decision-making and evaluation of food, particularly active in anorexics when assessing food options.

Nucleus Accumbens

A brain area involved in the reward pathway, ongoing dialogue with the prefrontal cortex, and dopamine release, where Delta oscillations are associated with hyper-rewarding perceptions of food in binge eating disorder.

pica

An eating disorder where people ingest non-food items like dirt, rocks, or metal, often caused by malnutrition but not always, and can be dangerous.

dorsal lateral striatum

A brain area in anorexics responsible for driving the habit of avoiding certain foods and approaching others, suggesting a reward for this behavior.

Supplements

Leucine

An essential amino acid vital for cell growth processes, including muscle growth, due to its relationship with the mTOR pathway.

Vitamin K2

A vitamin mentioned as important for blood lipid profiles, metabolism, and neural processes, often paired with D3.

Vitamin D3

A vitamin mentioned as important for blood lipid profiles, metabolism, and neural processes, often paired with K2.

Drugs & Medications

Zoloft

An antidepressant that emphasizes serotonergic circuitry, noted for its effect on serotonin levels in the brain and body.

Wellbutrin

An antidepressant that mainly increases dopamine and norepinephrine, effective for certain types of binge-eating disorder and smoking cessation.

Adderall

A stimulant drug used to treat ADHD, also mentioned as potentially effective in treating bulimia and binge eating disorder by increasing top-down control.

Paxil

An antidepressant that emphasizes serotonergic circuitry, potentially effective in treating bulimia by increasing serotonin.

MDMA

A psychoactive drug that increases dopamine and serotonin, being explored in clinical trials at Johns Hopkins for its potential to help rewire the brain for conditions like major depression and eating disorders.

psilocybin

A psychoactive compound, the active ingredient in 'magic mushrooms,' being explored in clinical trials for its effects on serotonin and brain rewiring for depression and eating disorders.

Ibogaine

A psychoactive substance mentioned as being used in other countries for eating disorder treatments, with mixed reports of benefits and serious side effects like seizure disorders.

Prozac

An antidepressant that emphasizes serotonergic circuitry, can be used to treat bulimia by increasing serotonin to lower anxiety and reduce hunger signals.

Vyvanse

A stimulant drug used to treat ADHD, also mentioned as potentially effective in treating bulimia and binge eating disorder by increasing top-down control.

People

Satchin Panda

A former colleague of Andrew Huberman at the Salk Institute for Biological Studies whose lab identified important health benefits of restricting feeding windows through intermittent fasting.

Jeremy Bailenson

A colleague of Andrew Huberman at Stanford University's Department of Communications who has conducted studies using VR to demonstrate the distorted self-image in anorexics.

Joanna Steinglass

A researcher at Columbia University in New York who conducted experiments on the habits and behaviors of anorexics, revealing their hyper acuity for fat content and the role of habit in the disorder.

Matthew Johnson

A researcher at Johns Hopkins School of Medicine involved in clinical trials exploring MDMA and psilocybin for neurological and psychiatric conditions.

Andrew Huberman

Host of the Huberman Lab Podcast and Professor of Neurobiology and Ophthalmology at Stanford School of Medicine, who discusses science and science-based tools.

Casey Halpern

An MD, Medical Doctor, Neurosurgeon, and PhD from Stanford (now at University of Pennsylvania) who studies binge-eating disorder and has developed pioneering treatments, including deep brain stimulation.

Organizations

Salk Institute for Biological Studies

The research institution where Satchin Panda's lab conducted studies on intermittent fasting.

Stanford School of Medicine

The institution where Andrew Huberman is a Professor of Neurobiology and Ophthalmology.

University of Pennsylvania

The institution where Dr. Casey Halpern is now working after leaving Stanford, continuing his research on eating disorders.

Columbia University

The institution where Dr. Joanna Steinglass and colleagues conducted research on anorexia, studying habits and perceptions.

Caltech University

Site of a study on human habits and stereotyped behaviors, illustrating the reflexive nature of daily actions.

Johns Hopkins School of Medicine

A medical institution where Matthew Johnson and others are conducting clinical trials exploring MDMA and psilocybin for mental health issues, including eating disorders.

Software & Apps

Headspace

A meditation app backed by published studies with many five-star reviews, offering meditations of various durations to tailor practice to individual schedules.

Companies

Athletic Greens

A vitamin, mineral, and probiotic drink that Andrew Huberman has been using since 2012 to cover nutritional bases, support gut microbiome, and provide energy.

Belcampo

A regenerative farm in Northern California that produces organic, grass-fed, and certified humane meats, noted for meat higher in nutrients and healthy fats like omega-3s.

Thorne

A supplement company partnered with the Huberman Lab, known for high stringency in ingredient quality and precision of amounts.