THE RESEARCH

Independent labs measured the difference.

Shisha smoke contains 4,800+ chemicals, including 69 known human carcinogens. Our filters were tested in independent US laboratories and the results are detailed below.

WHAT'S IN SHISHA SMOKE

The chemicals you're inhaling.

Despite passing through water, shisha smoke carries thousands of compounds. The most concerning are documented carcinogens and respiratory toxins. ROSH targets the worst.

Acenaphthylene

A polycyclic aromatic hydrocarbon (PAH). Causes oxidative stress in lung tissue, linked to chronic obstructive pulmonary disease (COPD).

Methylnaphthalenes

Associated with COPD (chronic obstructive pulmonary disease), bronchitis, loss of lung function, and cancers of the lung, oral cavity, esophagus, stomach, and bladder.

Phenanthrene

A key biomarker for total PAH exposure. Levels of phenanthrene metabolites correlate with overall toxic mixture concentration.

Benzene

Linked to leukemia. Levels in shisha can be over 6× higher than in cigarettes.

Nitrosamines

Among the most potent carcinogens found in shisha smoke. Formed during the burning of flavored tobacco.

Volatile aldehydes

Connected to lung cancer and leukemia. Includes formaldehyde and acetaldehyde, both classified as human carcinogens.

Heavy metals

Arsenic, chromium, lead, and nickel, accumulate in body tissue over repeated exposure with no safe lower bound.

4,800+

Total chemicals identified in shisha smoke. 69 are classified as known human carcinogens.

THE RESULTS

Three biomarkers. Three reductions. Independently measured.

Acenaphthylene Highest reduction−82.5%

Linked to oxidative stress, lung damage, and COPD (chronic obstructive pulmonary disease).

Methylnaphthalene−74%

Linked to bronchitis, loss of lung function, and cancers of the lung, oral cavity, esophagus, stomach, and bladder.

Phenanthrene−69%

Key biomarker for total polycyclic aromatic hydrocarbon (PAH) exposure.

Independent lab comparison: shisha session with vs. without ROSH filter.

METHODOLOGY

How the test was run.

Standardized session

Each test session used the same shisha equipment, tobacco type, coal weight, and pull frequency to control for variation across runs.

Smoke trap & analysis

Smoke from each session was captured and analyzed via gas chromatography-mass spectrometry (GC-MS) to quantify the concentration of each target compound.

With/without comparison

Sessions were run with and without the ROSH filter installed. The reduction percentages reflect the difference in compound concentration between the two conditions.

Independent verification

Tests were conducted by independent third-party laboratories in the United States. Repeated runs across multiple sessions confirmed the reduction figures.

Detailed test reports available on request for medical professionals and regulators.

Request the full report →

التقرير العلمي / FULL REPORT