Genes load the gun, but environment pulls the trigger
En México, donde las enfermedades crónicas siguen siendo la principal causa de muerte a pesar de los avances médicos modernos, los médicos Alexander y Pablo Krouham proponen una pregunta incómoda: ¿y si la medicina convencional trata los síntomas pero ignora la vida entera del paciente? Su nuevo libro, 'Medicina Funcional: Del Paciente al Protagonista', no rechaza la ciencia, sino que la exige con mayor profundidad, devolviendo al enfermo su papel como agente activo en su propia salud. Es una invitación a entender que entre los genes y la enfermedad existe un espacio donde las decisiones humanas todavía importan.
- México registró casi 800,000 muertes en 2023, la mayoría por enfermedades crónicas que la medicina convencional no ha logrado revertir.
- El modelo médico dominante trata síntomas y prescribe fármacos, pero rara vez interroga el estilo de vida, el entorno o el estrés que construyeron la enfermedad.
- Los Krouham argumentan que los genes no son un destino: el ambiente activa o silencia su expresión, y esa distinción abre una puerta que la medicina tradicional suele mantener cerrada.
- El nuevo libro reposiciona al paciente como protagonista de su recuperación, no como receptor pasivo de diagnósticos y recetas.
- Para que el cambio sea sistémico, Alexander Krouham ha creado un diplomado en línea de seis meses dirigido a médicos de distintas especialidades, apostando por transformar la forma en que los profesionales entienden la enfermedad.
México pierde cada año cientos de miles de personas por enfermedades que no son accidentes ni sorpresas: diabetes, enfermedades cardíacas, cáncer, cirrosis. Son acumulaciones lentas, moldeadas por cómo se vive. Frente a esa realidad, el endocrinólogo Alexander Krouham lleva años formulando una pregunta que parece obvia pero resulta subversiva: ¿y si la medicina está mirando demasiado estrecho?
En su primer libro, publicado en 2019, Krouham cuestionó el modelo que reduce al paciente a un conjunto de síntomas y al médico a un dispensador de recetas. Ahora, junto a su padre Pablo, también médico, publica 'Medicina Funcional: Del Paciente al Protagonista' (Hachette Bienestar), un título que ya contiene su tesis central: la persona enferma no debería ser un sujeto pasivo, sino el actor principal de su propia recuperación.
La medicina funcional que proponen no es una alternativa esotérica a la ciencia, sino una aplicación más rigurosa de ella. Examina las causas profundas de la enfermedad crónica —nutrición, sueño, movimiento, estrés, entorno— en lugar de limitarse a suprimir sus manifestaciones. Los Krouham sostienen que los genes cargan el arma, pero el ambiente aprieta el gatillo, y que comprender esa diferencia transforma radicalmente lo que significa tratar a alguien.
Para llevar este enfoque más allá de las páginas, Alexander Krouham ha diseñado un diplomado en línea de seis meses dirigido a médicos de diversas especialidades. La apuesta es clara: cambiar cómo piensan quienes ejercen la medicina, no solo informar a quienes la reciben. Ante unas estadísticas de mortalidad que no mejoran, los Krouham preguntan si tratar al paciente como protagonista podría, finalmente, comenzar a cambiarlas.
Mexico lost 788,830 people in 2023. The number sounds abstract until you consider what it represents: a country where heart disease, diabetes, cancer, and liver failure remain the leading causes of death, year after year, despite the existence of modern medicine. These are not sudden catastrophes. They are slow accumulations—the result of how people live, what they eat, what surrounds them, what they inherit and what they choose.
Dr. Alexander O. Krouham, an endocrinologist, began asking a question that should seem obvious but apparently isn't: what if the way we treat disease is fundamentally incomplete? In 2019, he published a book that deconstructed the traditional relationship between doctor and patient, arguing that medicine had become too narrow—focused on symptoms rather than the person experiencing them, on genes rather than the environment that activates or silences those genes. He called this approach functional medicine, and he positioned it not as an alternative to science but as a more rigorous application of it.
Now, alongside his father Pablo Krouham, also a physician, Alexander has written a second book: "Functional Medicine: From Patient to Protagonist." The title itself contains the argument. In conventional medicine, the patient is often a passive recipient—someone who arrives with a complaint, receives a diagnosis, takes a prescription, and leaves. In functional medicine, the patient becomes the central actor in their own recovery, understanding not just what is wrong but why it happened and what role they play in making it right again.
The book, published by Hachette Bienestar, proposes a model that examines the deep causes of chronic disease rather than merely suppressing its symptoms. This means looking at lifestyle, environmental conditions, stress, sleep, movement, nutrition—the texture of how a person actually lives. It means questioning the assumption that chronic disease is simply written into someone's DNA, unchangeable and inevitable. The Krouhams argue that genes load the gun, but environment pulls the trigger, and that understanding this distinction changes everything about how medicine should work.
For health professionals, Alexander Krouham has developed a six-month online diploma program in functional medicine, designed for specialists in internal medicine, family medicine, pediatrics, obstetrics and gynecology, psychiatry, and nutrition. The program reflects a conviction that this shift in thinking cannot happen through books alone—it requires training, a rewiring of how doctors are taught to see disease and patients.
The argument at the heart of both books is not that conventional medicine is wrong, but that it is incomplete. A person with type 2 diabetes needs to understand not just that their blood sugar is elevated, but how their daily choices—what they eat, how they move, how they sleep, what stresses them—have shaped that elevation, and how changing those things can reshape it back. A person with heart disease needs to see themselves not as a victim of their genetics but as someone with agency in their own recovery. This is not wishful thinking or rejection of science. It is, the Krouhams argue, science applied more thoroughly, more humanely, and more effectively than the symptom-focused model that currently dominates.
Mexico's mortality statistics suggest the current approach is not working. The question the Krouhams are asking is whether a different way of thinking about medicine—one that treats the patient as an active participant rather than a passive subject—might begin to change those numbers.
Notable Quotes
Functional medicine proposes an integrative vision that addresses the deep causes of chronic diseases, strengthening the body's self-healing mechanisms and encouraging active patient participation in their own health process— Dr. Alexander Krouham
The Hearth Conversation Another angle on the story
Why does functional medicine matter now, in Mexico specifically? The mortality numbers have improved since the pandemic.
Because improvement isn't the same as transformation. We're still losing hundreds of thousands of people to diseases we know how to prevent. The question isn't whether we're doing better than 2021—it's whether we're doing what actually works.
But doctors already tell patients to exercise and eat well. What's different about functional medicine?
The difference is in the depth of the conversation. Most medicine says "you have diabetes, take this drug." Functional medicine asks why you developed diabetes in the first place—what in your life created the conditions for it. That's a completely different starting point.
Doesn't that put too much blame on the patient? What if someone can't change their environment?
That's exactly why the patient has to be a protagonist, not a passive recipient. A doctor working functionally helps identify what can actually be changed, what's within reach. It's not about blame. It's about agency.
And the genetics question—you're saying genes don't determine disease?
Genes create vulnerability. But vulnerability isn't destiny. The environment decides whether that vulnerability becomes disease. That's the science. It's also the hope.