11. ADHD and Binge Eating: Evolutionary Biology, Biochemistry, and Clinical Recovery Strategies

Introduction to Sarah Osborne and Nutritional Coaching for ADHD

• Guest Background: Sarah Osborne is a BANT (British Association for Nutrition and Lifestyle Medicine) registered nutritionist, an ADHD advanced coach, and an emotional eating specialist.

• Clinical Shift: Sarah's career pivoted during the lockdown when her husband and son were diagnosed with neurodivergent traits, specifically ADHD and autism. This experience allowed her to observe eating behaviors through a new lens.

• Target Audience: For the past two years, her clinic has focused exclusively on neurodivergent clients, and for the last year, specifically on those experiencing emotional eating.

Redefining Binge Eating in the Neurodivergent Context

• Shift in Terminology: In clinical settings for ADHD, traditional "binge eating disorder" definitions may not fully capture the client experience. Sarah prefers the terms impulsive eating and compulsive eating to describe these behaviors.

• Definition of Bingeing: A binge is defined as eating excessively to the point of discomfort within a short period. While binging is often associated with eating disorders if it becomes a regular, problematic pattern, it also occurs sporadically or in ways that do not meet full diagnostic criteria for a disorder.

• Broader Context: Bingeing behavior is not restricted to food; individuals can also binge on television or mobile phone usage.

Statistical Data: ADHD and Eating Behaviors

Sarah Osborne conducted independent research involving a sample size of $500$ adults with ADHD. The findings include:

• Impulsive Eating: $9$ in $10$ adults ($90.0\%$) confirmed they struggle with impulsive eating.

• Meal Skipping: Almost two-thirds ($\approx 66.67\%$) skip meals at least twice a week. More than one quarter (> 25.0\%) skip meals on a daily basis.

• Forgetfulness and Hyperfocus: Approximately $96.0\%$ of respondents acknowledge they forget to eat as a result of being hyper-focused on tasks. More than $1$ in $4$ (> 25.0\%) report that this happens frequently.

• Key Driver: These habits—forgetting to eat, hyperfocus, and subsequent extreme hunger—create an imbalance that leads to binging on highly palatable, readily accessible foods.

The Evolutionary Biology of Hunger and Reward

• Ancestral Context: Humans have existed in their current form for more than $200,000$ years, spent $99.0\%$ of that time as nomadic hunter-gatherers. The human body is biologically built for this lifestyle.

• Hunger Signals: Ghrelin is the hormone released by stomach cells to send a message to the brain indicating it is time to eat.

• The Dopamine Motivator: For ancestors, finding food was a dangerous and difficult task. Survival alone was not a strong enough motivator, so the brain developed a strong reward mechanism using Dopamine to motivate individuals to face hardships to obtain food.

• Modern Mismatch: In the modern world, the reward mechanism remains the same, but the struggle is gone. High-reward foods (e.g., ice cream in a freezer) are instantly accessible. For neurodivergent individuals with an "inbuilt reward deficit" or dopamine imbalance, the lure of these modern foods is intensified.

Food as a Form of Stimulation and "Stimming"

• Stimming with Food: Many ADHD individuals use food to seek stimulation rather than nutrition. This is often an attempt to meet a dopamine need or get an energy hit.

• Triggers for Food Stimulation:

  • Relieving boredom.

  • Relieving anxiety or stress.

• Emotional vs. Physiological: High-sugar, sweet, and enticing foods provide immediate rewards that the ADHD brain craves to regulate its state.

Developmental Impacts and Cultural Pressures on Eating

• Childhood Conditioning: Many relationships with food are formed through traumatic or stressful early experiences, such as the "eat this, then you'll get that" mentality. Examples include being forced to finish everything on the plate before leaving the table.

• Diet Culture: The elitist nature of the nutrition world and the emphasis on weight gain/loss create a "food police" environment. This destroys the instinctive relationship with food, replacing it with confusion and stress.

• Decision Overload: For some neurodivergent individuals, the decision-making process regarding food is so stressful they occasionally wish they did not have to eat at all.

The Physiological Intersection of Blood Sugar and Mood

• Adrenaline and Glucose: If blood sugar crashes significantly (hypoglycemia), the body treats it as a physiological stressor and releases adrenaline. This triggers a fight or flight response, increasing heart rate and shutting down digestion.

• Mimicking Mental Health Issues: Fluctuations in blood sugar can feel identical to anxiety or depression in the brain.

• Scheduled Eating: The primary goal in early clinical work is establishing when and how a person eats. Stabilizing blood sugar is the key to emotional regulation, better sleep, and ending the cycle of seeking sudden dopamine hits.

The Gut-Brain Axis and the Role of the Microbiome

• Communication Ratio: The "gut-brain axis" is the communication line between the gut and brain. This communication is approximately $80.0\%$ gut-to-brain and only $20.0\%$ brain-to-gut.

• Microbiome Diversity: The human gut is home to trillions of microbes. These microbes are responsible for coding for dopamine, hormone balance, sleep, and skin health.

• The Playground Metaphor: Sarah describes the microbiome as a playground. In an imbalanced gut, certain "dominant/bully" microbes take over, causing important species to become "non-detectable."

• Seasonal Contrast: The Hadza tribe (a modern hunter-gatherer group) was studied by Stanford University. Their microbiomes are vastly more diverse than those in the modern world and change seasonally based on diet. Modern humans lack this diversity because their microbiomes are constantly bombarded with thousands of new, processed bits of information every day.

Clinical Strategies: Task Switching and "Vitamin P"

• Fiber First Access: Fiber is the "toy" for the microbiome. Simple swaps, like adding a piece of fruit (banana, tangerine, grapes) or using frozen/tinned vegetables, can result in big wins for microbial health.

• Habit Breaking and the 20-Minute Rule: To move from the Default Mode Network (stuck in a habit/loop) to the Task Positive Network (conscious decision-making), Sarah suggests:

  1. Using a visual cue (focusing on a specific object in the room).

  2. Setting a $15$ to $20$ minute reminder on a phone.

  3. Committing to a different activity during that window before deciding if you still want the food.

• Vitamin P (Pleasure): To avoid seeking "cheap" dopamine hits from food, individuals must find non-negotiable sources of joy. Examples from Sarah's clients include:

  • Roller skating.

  • Needlework or needlepoint.

  • Cycling.

  • Creative arts (painting, music).

Foundational Lifestyle Factors: Sleep and Hydration

• Tired and Wired: Sleep deprivation triggers cravings for high-calorie foods and shuts down wise decision-making.

• Melatonin vs. Cortisol: Melatonin rises in response to darkness to facilitate sleep, while Cortisol should be high upon waking. Modern blue light and constant environmental light disrupt this natural cycle.

• Evening Rituals for Relaxation:

  • Epsom Salt Bath/Foot Soak: Provides magnesium to relax muscles.

  • Pre-sleep Snacks: If necessary, these should be protein and complex carbohydrate-based rather than high-sugar.

  • Screen Gaps: Aim for at least a half-hour gap between screen use and attempting to sleep.

Questions & Discussion

• Question: Are mindset shifts useless without fixng the gut first?

• Sarah Osborne: No. The body is highly adaptable. Actions follow thoughts, so any mindset shift can improve the gut-brain connection and vagal tone.

• Question: How do you convince people that nourishment doesn't have to be Instagram-worthy?

• Sarah Osborne: Validating that realistic eating involves opening tins and putting things together quickly. The "false narrative" of healthy eating is damaging.

• Question: Is the food industry designed to keep the ADHD brain in a loop?

• Sarah Osborne: Yes. Ultra-processed foods provide absolute consistency (safety/routine) and use shiny packaging and novelty flavors to tap into the ADHD brain's need for dopamine rewards.

• Question: If your binge had a voice, what would it say?

• Sarah Osborne: It would say, "Slow down. When did you eat in a scheduled way today? Are you actually hungry?" It is often a signal that the body is hungry for proper nutrition.

• Question: What surprised you about this summit?

• Sarah Osborne: The rapid evolution of the conversation around neurotypes since $2020$. It has shifted from limited views (e.g., hyperactive children in America eating blue sweets) to a deeply validated, science-backed exploration of lived experience.