Popcorn Lung, EVALI, and Beyond: Vaping Health Risks Explained Simply

There's a lot of misinformation about vaping health risks — from both sides. The industry downplays everything, and some anti-vaping campaigns exaggerate. Here's what the science actually shows.

Popcorn Lung (Bronchiolitis Obliterans)

The term "popcorn lung" comes from workers in microwave popcorn factories who developed the condition after inhaling diacetyl, a buttery flavoring chemical, in large quantities over time.

What the science says: Diacetyl was found in many e-liquid flavors, particularly buttery, custard, and caramel varieties. When heated and inhaled, it can damage the small airways in the lungs. Most major brands have now removed diacetyl, but replacement chemicals like acetyl propionyl and acetoin have similar molecular structures and haven't been adequately studied for inhalation safety.

The real concern: Even without diacetyl, repeatedly inhaling heated flavoring chemicals carries risk. The absence of one known hazard doesn't make the products safe.

EVALI (E-cigarette or Vaping Product Use-Associated Lung Injury)

In 2019, a sudden outbreak of severe lung injuries swept across the United States. Over 2,800 people were hospitalized. 68 died.

What happened: The CDC ultimately identified vitamin E acetate — a thickening agent used in black-market THC cartridges — as the primary cause. It was not found in most commercial nicotine vape products.

What the industry wants you to think: "EVALI was a black market problem, not a vaping problem." This is partially true but deliberately misleading. The crisis exposed how little oversight exists in the vaping supply chain and how easily dangerous additives can enter the market.

What We Know for Certain

The long-term effects of vaping won't be fully understood for years. But here's what current research has established:

Confirmed risks:

• Nicotine addiction (this alone is a serious health impact)
• Increased heart rate and blood pressure
• Airway inflammation and irritation
• Exposure to ultrafine particles that penetrate deep into lung tissue
• Exposure to heavy metals from heating coils (nickel, chromium, lead)
• Impaired immune response in the lungs

Emerging concerns:

• Potential links to cardiovascular disease
• Effects on adolescent brain development
• Long-term pulmonary function impacts
• Interactions with pre-existing conditions like asthma

The "Safer Than Cigarettes" Argument

You'll hear this constantly: "Vaping is 95% safer than smoking." This claim originated from a single UK study and has been heavily criticized for its methodology. Even if directionally true, "safer than cigarettes" is an incredibly low bar.

The real comparison shouldn't be vaping vs. smoking — it should be vaping vs. not vaping. And on that comparison, the science is clear: your lungs are better off without either.

If you're using vaping as a stepping stone to quit smoking, that's one thing. But if you started vaping without ever smoking, you've introduced significant risk to a body that was doing fine without it.

What Should You Do?

If you're a current vaper concerned about your health, the answer is straightforward: quit. And we've built an entire resource to help you do exactly that.