A recent study has found that herbal cigarettes, often marketed as natural and tobacco-free alternatives, may be no safer—and in some cases more harmful—than conventional tobacco cigarettes. Researchers compared emissions from two of India's best-selling tobacco brands and four popular herbal varieties containing ingredients like basil, clove, cinnamon, mint, green tea, water lily, and chamomile.
Key Findings
The study, published in the Journal of Hazardous Materials, analyzed the physical, chemical, and oxidative properties of mainstream smoke from commercially available cigarettes in India. The results challenge the widespread belief that tobacco-free means risk-free.
According to Sameer Patel, an assistant professor at IIT Gandhinagar, emissions from herbal cigarettes matched or exceeded those from tobacco cigarettes on nearly every metric measured. Leaf-wrapped herbal variants, in particular, were found to be the most hazardous among all samples tested.
Emissions and Health Risks
The study revealed that sub-500 nanometer particle concentrations were approximately 20 percent higher in herbal cigarettes than in tobacco cigarettes. These fine particles are increasingly linked to cardiovascular and respiratory diseases. Additionally, particulate matter from herbal cigarettes showed significantly higher oxidative potential, indicating a greater capacity to generate reactive oxygen species that drive inflammation and tissue damage.
Lead Content and Regulatory Gaps
One herbal cigarette containing basil was found to have the highest lead concentration, despite being marketed as chemical-free and promoting a healthy lifestyle. This finding is particularly concerning because many consumers associate nicotine-free products with reduced harm.
The study also highlights a regulatory gap: India's Cigarettes and Other Tobacco Products Act (COTPA) regulates tobacco products but often excludes products marketed as tobacco-free. Similar gaps exist in other countries, underscoring the need for comprehensive toxicological evaluation and regulatory oversight of herbal cigarettes.
Methodology
Each cigarette was combusted inside a sealed, automated two-chamber rig designed to replicate human inhalation. Emissions were analyzed in real-time, and filter samples were collected for physical and chemical characterization. The oxidative potential of smoke was quantified as a proxy for toxicity.
The researchers emphasize that their findings call for urgent regulatory action to protect public health, as herbal cigarettes are not a safe alternative to tobacco.
