What Was EVALI? The Vape Health Crisis Explained
What Was EVALI? The Vape Health Crisis Explained
Must be 21+. For use where cannabis is legal. Please consume responsibly.
EVALI is a term that still comes up when people talk about vape safety, but the actual cause — and what it does and doesn't tell us about cannabis vapes broadly — is often misunderstood. Here's a factual look at what happened.
What EVALI Actually Stands For
EVALI stands for E-cigarette or Vaping Product Use-Associated Lung Injury, a term the U.S. Centers for Disease Control and Prevention (CDC) created during a 2019 outbreak of severe lung injuries linked to vaping products. The outbreak resulted in thousands of hospitalizations and dozens of deaths across the United States before being identified and traced to its source.
What Actually Caused It
According to the CDC's investigation, the outbreak was strongly linked to vitamin E acetate, a thickening additive found in many of the affected vape products. Vitamin E acetate was being used, primarily in illicit and unregulated THC vape cartridges, as a cheap way to dilute and thicken cannabis oil to stretch product volume. When heated and inhaled, vitamin E acetate can cause serious lung damage — a mechanism not present in properly formulated cannabis vape oil that doesn't contain this additive.
It's worth being precise about what the data showed: the CDC found that the vast majority of EVALI cases were linked to illicit market THC products, not products purchased from licensed dispensaries that had gone through state-mandated testing.
Why Licensed, Tested Products Are a Different Category
This is the most important distinction from the EVALI investigation, and it's the part that gets lost in casual references to the crisis: licensed cannabis products in regulated markets are required to undergo testing that would catch additives like vitamin E acetate before the product could legally reach a dispensary shelf. This testing requirement is part of why public health messaging following the outbreak specifically emphasized buying from licensed, regulated sources rather than avoiding cannabis vaping altogether.
This doesn't mean every product on every shelf is automatically risk-free — testing requirements and rigor still vary somewhat by state — but it does mean the specific mechanism behind EVALI (vitamin E acetate as a cutting agent) is a known, testable, and avoidable risk within a properly regulated supply chain.
What Changed in the Industry After EVALI
The outbreak led to meaningful shifts across the legal cannabis industry:
- Increased scrutiny on cutting agents and additives in vape oil formulations, with vitamin E acetate specifically banned or restricted in several state regulatory frameworks.
- Stronger emphasis on lab testing transparency, with more consumers and retailers actively checking Certificates of Analysis (COAs) rather than trusting packaging claims alone.
- Greater public awareness of the gap between licensed and illicit market products, which had previously been less understood by casual or new cannabis consumers.
How to Protect Yourself Going Forward
A few practical takeaways that apply regardless of which brand or product you're considering:
- Buy only from licensed dispensaries. This remains the single most effective protection against the specific risk that caused EVALI, since licensed products are required to pass testing that screens for harmful additives.
- Check the Certificate of Analysis (COA) for the specific batch you're buying. A proper COA should confirm the product passed contaminant and additive screening relevant to your state's regulations.
- Be especially cautious of unusually cheap vape products sold outside licensed channels. Diluting agents like vitamin E acetate were used specifically to cut costs and stretch volume, which is part of why unusually low pricing on unlicensed products is a meaningful warning sign.
- Avoid vape products with no clear sourcing or licensing information. If a product can't be traced to a licensed manufacturer and distributor, it falls outside the testing framework that exists specifically to catch this kind of risk.
For more on how to read a COA and verify what's actually been tested for in a specific batch, see How to Read a Cannabis COA: Understanding Your Lab Results. For more on the licensing and packaging information that should accompany any legally sold product, see Cannabis Packaging Labels Explained: What Every Symbol and Number Means.
FAQ
What does EVALI stand for?
E-cigarette or Vaping Product Use-Associated Lung Injury, a term created by the CDC during a 2019 outbreak of severe vaping-related lung injuries in the United States.
What caused EVALI?
The CDC's investigation strongly linked the outbreak to vitamin E acetate, an additive found primarily in illicit, unregulated THC vape products used to dilute and thicken cannabis oil.
Were licensed dispensary products linked to EVALI?
The CDC found the vast majority of cases were linked to illicit market products rather than products purchased from licensed dispensaries that had undergone state-mandated testing.
How can I avoid the risk that caused EVALI?
Buy only from licensed dispensaries, check the Certificate of Analysis (COA) for the specific batch, and be cautious of unusually cheap vape products sold outside licensed retail channels.
Must be 21+ to purchase. Please consume responsibly.