Study Finds Herbal Cigarettes Can Be As Harmful As Tobacco

Overview

• A peer‑reviewed paper in the Journal of Hazardous Materials released in late May 2026 reports that emissions from commercially sold herbal cigarettes match or exceed tobacco on several lab toxicity metrics.
• The study found herbal smoke produced about 20% higher concentrations of particles smaller than 500 nanometres, a size range linked to heart and lung disease.
• Leaf‑wrapped herbal variants using tendu leaves showed roughly 49% higher oxidative potential, a lab measure tied to inflammation and tissue damage, than paper‑wrapped samples.
• Chemical testing flagged a basil‑filled product with the highest lead level among samples, underscoring a gap between wellness marketing and measured contaminants.
• Researchers burned products inside a sealed two‑chamber rig to mimic inhalation and stressed that the work measures emission properties rather than direct disease outcomes, while calling for tighter regulation and further toxicological and population studies because many herbal products fall outside existing tobacco laws.