It doesn’t begin with a diagnosis.
It begins quietly.
A man wakes at 3 a.m. and cannot fall back asleep.
A young woman loses interest in everything she once loved.
A teenager stares at a screen for hours, feeling nothing—and not understanding why.
No one calls it depression—yet.
They call it stress. Burnout. A phase. Life.
And so it goes unnoticed… until it doesn’t.
Depression has become one of the defining illnesses of our time—but not in the way most people think.
We are told it is a “chemical imbalance.”
We are told it is a problem of serotonin.
We are told it is something that can be corrected with a prescription.
But the epidemiology tells a very different story.
Depression is not shrinking.
It is expanding—rapidly.
Today, depression affects nearly 300 million people worldwide, making it one of the leading causes of disability on the planet. In the United States alone, tens of millions of adults experience depressive symptoms each year, and the numbers are rising—not falling.
But the most striking change is not just the scale.
It is who is being affected.
For decades, depression was most common in adults between the ages of 20 and 50. That is no longer true.
Today, the highest rates are seen in adolescents and young adults.
Nearly one in three young people now report symptoms of depression.
This is not a subtle shift.
It is a fundamental change in the biology—and sociology—of modern life.
At the same time, another paradox has emerged.
Women are diagnosed with depression at roughly twice the rate of men.
Yet men die by suicide three to four times more often.
This is not simply a difference in disease.
It is a failure of recognition.
Diagnosis of Depression
Depression is a mental disorder characterized by sadness, loss of interest in activities, and decreased energy. Other symptoms include loss of confidence and self-esteem, inappropriate guilt, thoughts of death and suicide, diminished concentration, and disturbance of sleep and appetite.
Diagnostic criteria for a major depressive episode (DSM-V) include a depressed mood, a marked reduction of interest or pleasure in virtually all activities, or both, lasting for at least two weeks. In addition, three or more of the following must be present:
gain or loss of weight
increased or decreased sleep
increased or decreased level of psychomotor activity
fatigue
feelings of guilt or worthlessness
diminished ability to concentrate
recurring thoughts of death or suicide
Depression does not occur in isolation.
It travels with other conditions:
Obesity
Diabetes
Cardiovascular disease
Chronic inflammation
Chronic pain
It is increasingly clear that depression is not simply a disorder of mood.
It is a disorder of the whole body.
A systemic illness.
A metabolic and inflammatory state that affects the brain—but does not originate solely within it.
And then there is the most troubling reality of all:
We are not treating it effectively.
Despite decades of pharmacologic advances:
Up to 70% of patients do not achieve sustained remission
Many receive treatment late—or not at all
Most antidepressants offer only modest benefit for the majority of patients
Meanwhile, suicide rates continue to rise.
In the United States, nearly 50,000 people die each year by suicide, making it one of the leading causes of death in young adults.
Something is wrong.
Not just with our treatments—but with how we understand the disease itself.
The modern epidemic of depression did not arise from a sudden global deficiency of serotonin.
It emerged alongside:
Profound changes in diet
Chronic sleep disruption
Social fragmentation
Reduced sunlight exposure
Sedentary behavior
Digital overstimulation
These are not psychiatric variables.
They are biological and environmental stressors.
Depression, in many patients, may represent a failure of adaptation to the modern environment.
A mismatch between human biology and modern living.
This does not mean that medications have no role.
For some patients, they are essential.
But it does mean that a narrow, reductionist model—focused only on neurotransmitters—is insufficient.
If depression is a whole-body disorder…
Then treatment must also be whole-body.
The epidemiology is telling us something important—if we are willing to listen.
Depression is increasing.
It is shifting younger.
It is deeply intertwined with metabolism, inflammation, and environment.
And most importantly:
It is not being solved by our current approach.
The question is no longer:
“Which drug should we prescribe?”
The real question is:
“What has changed in the human condition that is making so many people unwell?”
That is where the next chapter begins.
I worry about our young men more than any other group. Everything they’re being taught and being fed undermines their strength. They’re told that their strength is evil and the world would be a better place without men. Especially white men. Add to that the metabolic disasters caused by the food they grow up on and the sedentary lives they start leading all too young — and Houston, we have a problem. I can’t think of a better doctor to guide the future generations of men out of this than you, Dr. Marik — because you were canceled and vilified for doing what men do at their best, stand up for the truth. Thank you and God blesses you every day.
For brain support, I take creatine daily in a smoothie. When my husband passed suddenly last year, I began taking creatine, and it quickly calmed my brain. I didn’t take any medication, alcohol, or drugs for depression. I only took creatine and supplements.
One of my medical doctor sons was a Navy doctor and worked with Navy SEALs, who used creatine to enhance brain sharpness. Creatine is also used in the treatment of traumatic brain injuries.
There is a lot of research about creatine for brain support.