The Shocking First Bite: Immediate Reaction
For filmmaker Morgan Spurlock, the first Supersize meal was not a triumphant moment but a nauseating experience. Having started the experiment with a lean and healthy physique, his body was not accustomed to the overwhelming volume of processed food, fat, and sugar. The first time he was offered and accepted the Supersize option, he took nearly twenty minutes to consume it, followed by a violent expulsion of the contents. This episode of vomiting was a visceral and immediate indicator that his body was protesting the dietary abuse. Rather than feeling satisfied or energized, he was left feeling ill and depleted, a stark contrast to his pre-experiment state.
The Prelude to a Health Crisis
This initial reaction was just a symptom of a much larger, and more serious, health crisis looming. While the immediate effect was a dramatic act of physical rejection, the cumulative impact of his new diet would be far more insidious. This was a glimpse into how his body, once in peak condition with low body fat and normal blood pressure, would rapidly decline. The doctors monitoring him were initially skeptical of any major harm but were soon shocked by the rapid and profound changes. The initial sickness was the body's early warning system failing, and soon Spurlock's system would begin to adapt in profoundly unhealthy ways.
The Escalating Toll of the Fast-Food Diet
Beyond the first meal's sickness, Spurlock’s health continued its downward spiral throughout the 30-day challenge. The daily consumption of roughly 5,000 calories, often high in fat and sugar, caused a cascade of physical and mental health issues.
Timeline of escalating health problems:
- Day 5: Spurlock gains 10 pounds and his health begins to deteriorate noticeably.
- Day 9: He experiences a significant drop in mood, displaying symptoms of depression.
- Day 12: His weight has now increased by 17 pounds.
- Mid-Experiment: Spurlock reports a decrease in sexual performance and finds himself becoming addicted to the high-glycemic foods, feeling good after eating but awful between meals.
- Day 21: Heart palpitations and significant liver issues begin to appear, alarming his doctors who urge him to stop.
A Comparison of Health Metrics: Before vs. After
Spurlock's pre-experiment health was meticulously documented. A comparison with his 30-day post-experiment results provides a shocking look at the damage caused by the diet.
| Metric | Before Experiment | After 30 Days of Fast Food | Source | 
|---|---|---|---|
| Body Weight | 185.5 lbs (84 kg) | 210 lbs (95 kg) | |
| Body Mass Index (BMI) | 23.2 (Healthy) | 27 (Overweight) | |
| Body Fat Percentage | 11% (Very Healthy) | 18% (Much Higher) | |
| Cholesterol Level | Low/Healthy | Spiked to 230 | |
| Liver Health | Normal | Turning to fat, risk of cirrhosis | 
Mental and Emotional Decline
While the physical effects were dramatic, the mental and emotional toll was equally profound. Spurlock's mood became highly erratic, swinging from depression to fleeting contentment only after consuming more fast food, a clear sign of addictive behavior. This emotional fragility, coupled with the constant physical discomfort and lethargy, paints a picture of a man suffering from more than just a poor diet; he was experiencing a full-blown dependency on junk food.
The Aftermath and Legacy of Super Size Me
It took Spurlock over a year to shed the weight and restore his health, with his then-girlfriend and chef, Alexandra Jamieson, devising a detox diet to aid his recovery. In the long run, Spurlock noted a lasting impact on his metabolism, making it easier to gain weight. The documentary was a wakeup call for many, forcing a discussion about the health implications of the fast-food industry. Following the film's release, McDonald's phased out its Supersize option, though they denied any direct link to the documentary. Despite criticisms regarding Spurlock's extreme methodology and later personal revelations, the film had a demonstrable impact on public awareness and food corporation practices. The documentary serves as a powerful illustration of the consequences of a nutrient-poor, high-calorie diet, starting with that one nauseating Supersize meal.
Conclusion: The First Meal's Telling Story
The feeling of intense sickness that Morgan Spurlock experienced after his first Supersize meal was not a random event but a predictive moment. It was his body's desperate, immediate protest against a dietary change that was fundamentally unhealthy. This reaction set the stage for a month of escalating physical and mental degradation, from weight gain and mood swings to serious liver damage and signs of addiction. The experiment vividly demonstrated how a diet consisting solely of fast food could wreak havoc on a person's health, turning an initial feeling of nausea into a prolonged and dangerous battle for well-being. It is a powerful lesson that still resonates today about the importance of balanced nutrition and mindful eating, beginning with the first bite.
Check out an interview with Morgan Spurlock years after the documentary, discussing its lasting impact: Civil Eats Interview