The Madness of King Henry VIII—and What We Got Wrong About Obesity

The King We Forgot

There is a moment in history that most of us think we understand. King Henry VIII—large, immobile, temperamental—has become almost a caricature of excess. We picture a man who simply ate too much, moved too little, and paid the price. It is a tidy story. Unfortunately, it is also likely the wrong one.

Before the 1530s, Henry was something very different. He was athletic, charismatic, and energetic. He hunted, he jousted, he played sports, and he carried himself like the Renaissance ideal—educated, capable, and physically impressive. His armor, still preserved today, tells that story clearly. Narrow waist. Broad chest. Built for motion.

The Fall That Changed Everything

Then everything changes.

In January of 1536, Henry was thrown from his horse during a jousting match. The horse fell on him. He was reportedly unconscious for hours. Not minutes—hours. Even by modern standards, that is a significant traumatic brain injury.

Soon after, in May of that same year, Anne Boleyn was arrested and executed. She was accused not only of adultery but also of witchcraft. That detail matters. Prior to this period, Henry was not known for superstition. He was a rational thinker. Yet suddenly, accusations of witchcraft become part of the story. It is tempting to say this was political theater. It may have been. Still, the timing is difficult to ignore.

Meanwhile, his body begins to change.

The Story We Told Ourselves

At first, historians explained this in simple terms. He ate more. He exercised less. Calories in, calories out. That explanation sounds neat. It fits what we like to believe. Even so, the math does not hold up.

To gain over 200 pounds, you need a massive and sustained excess of calories. A reduction in physical activity alone does not explain that. We measure activity in METS—metabolic equivalents—and even a dramatic drop in activity would not account for that level of weight gain. In other words, you cannot outrun the math.

Yet every January, gyms fill with people who are told exactly that. Move more. Try harder. Burn it off. By February, most of those gyms are empty again. If exercise alone solved obesity, we would not still have the problem.

The Organ in Charge

So what did we miss?

The answer sits deep in the brain, in a small but powerful structure called the hypothalamus. It regulates hunger, satiety, hormones, and stress. When it works, eating feels normal. You get hungry, you eat, you stop. No drama. No constant thinking.

However, when the hypothalamus is disrupted—by injury, disease, or chronic metabolic stress—that quiet system becomes loud. Hunger no longer behaves like a signal. It becomes a drive.

This is not theory. Modern medicine has a name for it: acquired hypothalamic obesity. After traumatic brain injury, some patients develop rapid weight gain, persistent hunger, and changes in impulse control. Studies show that nearly half of patients with significant brain injury gain weight over time. The strongest predictor is not inactivity. It is hyperphagia—an abnormal increase in appetite.

In simpler terms, the problem is not how much people move. It is what their brain is telling them to do.

What Patients Taught Me

That pattern feels familiar if you have ever sat with patients. I have. Years ago, working with former NFL players, we noticed something striking. The players who struggled most with weight often had long histories of concussions. Not all of them gained weight. Yet those who did described the same experience—something they had never felt before.

Food noise.

Not hunger. Noise. A constant suggestion that does not go away.

At first, I understood that as a physician. Later, I understood it as a person.

When the World Went Quiet

About twelve hours after my first injection of Zepbound, something changed. The world became quiet. For the first time, I realized how much of my thinking had been shaped by that background noise. It did not disappear dramatically. It simply stopped.

Since then, I have lost fifty pounds. More interesting than the weight loss is what happens between doses. As the medication wears off, the noise returns—subtly at first. A thought here. A reminder there. Even my stress levels rise slightly, something I can see on my WHOOP device. Then, a few hours after the next injection, it quiets again.

That experience changes how you see patients. It changes how you see history.

Looking Back at Henry

Because now, when we look back at Henry, we are not just looking at excess. We are looking at a possible disruption of the system that regulates behavior itself.

There are hints of this even in his own time. A French ambassador noted that Henry’s chronic leg pain troubled him often and that he compensated by eating and drinking more. Later reconstructions suggest large meals, heavy in meat, along with substantial alcohol intake. Those numbers are estimates, not precise measurements. Even so, the pattern is clear.

Something was driving the behavior.

Decline, Not Indulgence

By the end of his life, Henry could barely move. Mechanical devices were needed to help him stand. He lost close allies, including Thomas Wolsey and Thomas More. His body deteriorated. His mood worsened. This was not simply indulgence. It was decline.

What We Can Do Now

Today, we have tools that speak directly to that system. GLP-1 medications do not give people discipline. They restore control. Patients do not say they are stronger. They say it is quieter.

That distinction matters.

Because obesity was never just about calories. It was about signaling and about biology. It was about a system that, once disrupted, can push behavior in ways that are very difficult to resist.

The Real Lesson

So when we look at Henry VIII, we should be careful before we judge him as a man who simply lacked restraint.

We may not know exactly how much he ate.

Nevertheless, we know something was driving it.

And when we ignore that truth today, we do more than misunderstand the disease.

We blame the patient for having it.

References

Argente J, Farooqi IS, Chowen JA, Kühnen P, López M, Morselli E, Gan HW, Spoudeas HA, Wabitsch M, Tena-Sempere M. Hypothalamic obesity: from basic mechanisms to clinical perspectives. Lancet Diabetes Endocrinol. 2025 Jan;13(1):57-68. doi: 10.1016/S2213-8587(24)00283-3. Epub 2024 Nov 12. Erratum in: Lancet Diabetes Endocrinol. 2025 Jan;13(1):e1. doi: 10.1016/S2213-8587(24)00368-1. PMID: 39547253.

Henry VIII, the Brain, and the Obesity