Navigating the Misinformation Around Vape Safety
The conversation around cannabis vaporization has been clouded by flawed testing, public panic, and confusion around the EVALI outbreak. This page focuses on operating temperatures, carrier ingredients, and the distinction between regulated ingredients and illicit additives.
The Truth About PG, PEG, and Testing Temperatures
Concerns around PG and PEG often trace back to studies using unrealistic overheating conditions. Standard cannabis vaping hardware typically operates in the 160-200°C range, while some lab studies tested much higher conditions that users would reject because of harsh dry-puff taste.
The Established Safety Record of Propylene Glycol
Propylene glycol has a long history as a carrier in pharmaceutical inhalers and nebulizers. Temperature context matters when interpreting safety claims.
Clearing the Record on the EVALI Outbreak
The CDC investigation identified Vitamin E acetate, a thickener used in illicit THC cartridges, as the primary EVALI culprit. Standard carrier ingredients should not be conflated with that outbreak.
Vaporization vs. Combustion: The Efficiency Gap
Combustion occurs at temperatures that destroy a meaningful portion of active cannabinoids and terpenes while creating smoke toxins. Low-temperature vaporization is more aligned with cannabinoid preservation and cleaner delivery.
A cited 2003 analytical study found far greater THC recovery from vaporization than from cannabis smoke, alongside fewer smoke toxins.
The Importance of Terpene Preservation
Terpenes are temperature-sensitive aromatic compounds. High-temperature dabbing and combustion can degrade the terpene profile, while low-temperature vaporization better preserves aroma, flavor, and the broader entourage effect.
Frequently Asked Questions
Is PG safe to vape?
When used correctly and at realistic temperatures, PG has a long pharmaceutical inhalation history. Most concerns come from unrealistic overheating studies.
Did liquidizers cause the EVALI outbreak?
No. The CDC identified Vitamin E acetate in illicit cartridges as the primary culprit.
Why is vaporization better than smoking?
Vaporization operates at lower temperatures, helping preserve cannabinoids and terpenes while avoiding many smoke toxins.
What temperature should I vape concentrates at?
The research notes favor realistic low-temperature ranges around 160-200°C for preserving cannabinoids and terpenes.
References
[1] Terps USA Research. (2026). The Science of Safety: Debunking the Myths Surrounding Propylene Glycol and Polyethylene Glycol in Vaping Applications.
[2] Terps USA Research. (2026). Why Settle: The War on Vapor.