There is a particular kind of exhaustion that comes from fighting your own body. It is the depletion of a person at war with the signals their physical self sends. It is not without help that these signals became something people learned to distrust. The estrangement from our appetite is learned, passed down through families, cultures, and industries that profit from it.
But when hunger rises and gets pushed back down, something older and more patient than consciousness will keep sending it back up. The body, in its patience and its desperation, keeps sending the same messages. Eat. Rest. Grow.
Hunger and Biological Intelligence
The salmon doesn’t decide to return. There is no deliberation; when the time comes, it simply knows and moves. It navigates thousands of miles of open ocean back to the exact freshwater stream where it began, following cues so subtle and so ancient that science has only partially mapped them. The journey is exhausting and dangerous and completely without doubt. The salmon doesn’t question the pull. It follows it toward something it has never consciously seen and yet recognizes completely.
Hunger works the same way. Long before anyone developed a relationship with food that required management or correction, the body already knew what it needed and how to ask for it. The craving for something sweet is the brain signaling its need for glucose, the only fuel it runs on. The pull toward salt is the body tracking its mineral balance. The desire for fat is an ancient calculation about energy density, about having enough stored to survive what comes next. Bitter tastes trigger instinctive caution because, across hundreds of thousands of years of human evolution, bitter often meant poison. This is a vocabulary so precise and purposeful that the body uses to navigate its own survival.
We are part of an ecosystem, not separate from the biological intelligence that moves the salmon upstream, but continuous with it. Hunger belongs to the same order of intelligence that keeps every living system oriented toward what it needs. It has been here far longer than the opinions about it.
The Persistence of Hunger
Eating disorders are the ultimate disrupters. They silence all of our instincts and upend the natural rhythms of our internal worlds. They create so much interference around the body’s signals that they become impossible to trust or follow without enormous fear. And yet the physical self keeps sending them.
In the 1940s, researcher Ancel Keys conducted the Minnesota Starvation Study, restricting the caloric intake of healthy male volunteers to observe the effects of semi-starvation. What happened to those men has since become one of the most important pieces of evidence we have about what the body does when it is denied enough food. They became obsessed with food, reading cookbooks, and collecting recipes in an era when men rarely engaged with that type of material. Some began cooking elaborate meals for others while barely eating themselves. They lingered over menus, talked, and dreamt about food. Their entire psychological world contracted around the very thing they were being denied.
The ecosystem reasserts itself through whatever channels remain available. The body, denied what it needs, turns up the volume. It finds every available pathway back toward nourishment, because that is what bodies are built to do. Obsessive thoughts and rituals forming around food in the depths of an eating disorder are the system’s attempt to return to itself.
Movement, too, has been pulled out of its natural context. The body was built to move as part of being alive in a physical world. The body that was designed to carry us toward what we need has, in eating disorders, been conscripted into the project of self-reduction. Beneath the compulsion and the rigidity, the body’s original relationship with movement as pure animal aliveness remains intact, waiting.
An Ecosystem in Crisis
At its most extreme, this battle with cravings and hunger becomes the organizing principle of a person’s entire life. Eating disorders are that level of entrenchment. Anorexia nervosa starves the ecosystem into silence, severing the connection to hunger so completely that the body’s most basic signals stop registering as information. Bulimia nervosa floods and purges that same system in cycles that leave the body’s cues unreliable and the relationship with food governed entirely by shame. Binge eating disorder overwhelms it in ways that compound that shame further, while avoidant restrictive food intake disorder narrows it until fear is the only thing mediating every encounter with food. Compulsive exercise, which receives far less clinical attention than it warrants despite being potentially fatal, weaponizes the body’s relationship with movement, turning what was once a natural expression of physical life into a form of punishment.
This is also what makes eating disorders categorically different from conditions where abstinence offers a viable path toward recovery. Someone struggling with alcohol or gambling can, with support, remove the substance or behavior from their life and build recovery around its absence. Hunger returns every few hours regardless of what a person believes about it or wants from it. The ecosystem of appetite cannot be avoided. Recovery from an eating disorder requires rebuilding a relationship with the very thing that has become the source of the pain.
Recovery and the Long Return
A disconnection from hunger and cravings is not always indicative of an eating disorder, but an eating disorder is always the disruption of the ecosystem of appetite. Eating disorders are among the most deadly of all mental health conditions, and their prevalence and mortality rate are still largely unknown to the general public.
But the physical self is persistent in ways that outlast everything done to silence it. It simply keeps asking, because it has always known what it needs. Recovery asks something similar of the people who have spent years at war with their own hunger. A willingness to turn toward the body’s oldest intelligence and begin the long return.
The salmon trusts the pull toward home. It orients toward what it has always known and follows that knowing through exhausting water and impossible distance, back to where it began. Cravings are the current the body has never stopped generating, the pull toward something it has always known how to find.
