What Causes Pulmonary Hypertension? The Answer May Be on Your Plate

Pulmonary hypertension (PH) is a life-altering condition that silently puts pressure on the lungs and the heart. It’s not just another form of high blood pressure — it’s a specific and dangerous elevation of pressure in the pulmonary arteries, the vessels that carry blood from your heart to your lungs. Over time, this pressure can strain the right side of the heart, leading to fatigue, heart failure, and even death.

But what actually causes pulmonary hypertension?

While traditional medicine categorizes PH into five distinct groups based on various triggers — like heart disease, chronic lung conditions, blood clots, and autoimmune disorders — a deeper question remains: Why are so many people developing the root conditions that lead to PH in the first place?

Let’s turn to the words of Dr. Michael Klaper, featured in the documentary What the Health, for a bold, clarifying insight:

> “If I could tell doctors or researchers who are looking for the cause of high blood pressure, clogged arteries, diabetes, and the cause of obesity? I would tell them in three simple words — it's the food. It's what Americans are eating.”

This powerful statement echoes what science is increasingly confirming: diet is often the common denominator behind the leading chronic illnesses that can evolve into more complex diseases like pulmonary hypertension.

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How Food May Contribute to Pulmonary Hypertension

Let’s break it down:

1. Left Heart Disease – the #1 Trigger of PH

A diet rich in animal fats, processed meat, and high sodium levels can lead to hypertension, heart failure, and clogged arteries. Over time, this burdens the left side of the heart — causing blood to back up into the lungs and triggering PH.

2. Lung Disease and Inflammation

Foods that promote inflammation — such as fried foods, refined sugars, and dairy — have been linked to respiratory conditions like asthma and COPD. A poor diet may not directly cause PH, but it can worsen the diseases that do.

3. Blood Clots in the Lungs

Atherosclerosis, high cholesterol, and poor circulation (often diet-related) increase the risk of clot formation — another cause of pulmonary hypertension.

4. Autoimmune Disorders & Liver Disease

Conditions like lupus, scleroderma, or fatty liver disease — all linked in part to dietary triggers — are rising in prevalence and are known causes of secondary PH.

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Symptoms You Shouldn’t Ignore

Pulmonary hypertension often goes unnoticed until it becomes severe. Symptoms may include:

Shortness of breath (especially during activity)

Chest pressure or pain

Fatigue

Swelling in legs or ankles

Lightheadedness or fainting

If you’re experiencing these signs, don’t wait — early testing can be life-saving.

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What Can Be Done? A Preventative, Plant-Based Path

Dr. Klaper’s warning isn’t just about what not to eat — it’s a call to return to natural, whole foods that heal rather than harm.

A low-fat, whole-food, plant-based diet is rich in:

Leafy greens (which improve nitric oxide levels and artery function)

Whole grains and legumes (high in fiber and heart-protective nutrients)

Fresh fruits and vegetables (anti-inflammatory and antioxidant-rich)

This lifestyle supports healthy weight, better oxygen delivery, reduced inflammation, and stronger cardiovascular function — all key in preventing and managing PH.

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Final Thoughts: It’s the Food

Whether you’re a patient, caregiver, or curious reader, understanding pulmonary hypertension starts with recognizing the bigger picture: chronic disease isn’t random — it often begins on our plates.

And as Dr. Klaper wisely says,

> “It’s the food. It’s what Americans are eating.”

The good news? We can change that — one plant-based meal at a time.

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