Hookah is harmful to your health. A typical hour-long session exposes you to roughly 90,000 milliliters of smoke, which is 100 to 200 times more than a single cigarette produces. That massive volume carries nicotine, tar, heavy metals, carbon monoxide, and cancer-causing chemicals into your lungs, and the water in the base does almost nothing to filter them out.
How a Single Session Compares to Cigarettes
One of the most persistent beliefs about hookah is that it’s a safer alternative to cigarettes. The numbers tell a different story. In a single session, you’re exposed to about 9 times more carbon monoxide and 1.7 times more nicotine than you’d get from one cigarette. The charcoal used to heat the tobacco is a major part of the problem: it generates carbon monoxide at levels roughly 9 to 10 times higher than what cigarette smoking or electrically heated hookah produces.
The sheer volume of smoke matters too. A cigarette delivers about 500 to 600 milliliters of smoke. A one-hour hookah session delivers around 90,000 milliliters. You’re pulling deeper, longer breaths through the hose, which means toxicants reach further into the lungs and stay in contact with tissue longer.
Carbon Monoxide Poisoning Is a Real Risk
The charcoal that sits on top of the hookah bowl burns continuously, pumping carbon monoxide into every draw. Research measuring exhaled carbon monoxide found that levels jumped by an average of 24 parts per million after a charcoal-heated hookah session. That’s nearly ten times the increase seen after smoking a cigarette. Carbon monoxide binds to red blood cells far more readily than oxygen does, so high exposure starves your tissues and organs of the oxygen they need.
This isn’t theoretical. Emergency departments regularly see hookah smokers with symptoms of carbon monoxide poisoning: headache, dizziness, nausea, and in severe cases, loss of consciousness. Poorly ventilated hookah lounges make this worse, since both the smoker and everyone nearby are breathing in charcoal fumes continuously.
Effects on Your Heart and Blood Vessels
Even a short hookah session produces measurable cardiovascular stress. In young, healthy people, 15 to 30 minutes of hookah smoking raises heart rate by 6 to 13 beats per minute, systolic blood pressure by 3 to 16 mm Hg, and diastolic blood pressure by 2 to 14 mm Hg. Those spikes happen because nicotine stimulates your nervous system while carbon monoxide reduces the oxygen available to your heart muscle.
The American Heart Association issued a scientific statement warning that these acute effects, repeated over time, contribute to lasting damage to blood vessel walls. Hookah smoke impairs the ability of arteries to relax and dilate properly, a process that, when chronically disrupted, sets the stage for atherosclerosis, heart attack, and stroke.
Lung Damage and Cancer Risk
Long-term hookah use damages your airways in ways that mirror cigarette smoking. Studies have found chronic bronchitis in about 12% of hookah smokers, slightly higher than the roughly 10% rate seen in cigarette smokers. The large volume of hot, particle-laden smoke irritates and inflames the lining of the bronchial tubes over time, leading to persistent cough, mucus production, and reduced lung function.
The cancer risk is substantial. A study comparing lung cancer patients to healthy controls found that people with a history of hookah smoking had nearly six times the risk of developing lung cancer. The smoke contains polycyclic aromatic hydrocarbons and volatile aldehydes, both established carcinogens. Sidestream hookah smoke (the smoke that drifts off between puffs) contains roughly four times the cancer-causing polycyclic aromatic hydrocarbons and 30 times the carbon monoxide of sidestream cigarette smoke.
Nicotine Addiction
Hookah tobacco, known as shisha, contains nicotine, and a single session delivers more of it than a cigarette does. That 1.7-fold greater nicotine exposure per session makes hookah an effective nicotine delivery system, even if sessions happen less frequently than cigarette breaks. Many people who start hookah socially develop cravings and find it difficult to stop, following the same addiction pattern as cigarette smokers. The flavored tobacco and social setting can mask the reality that your brain is building nicotine dependence with each session.
Sharing a Hose Spreads Infections
Hookah is almost always a group activity, and passing a hose around a circle creates a direct route for pathogens. The mouthpiece, hose interior, stem, and even the water in the base can harbor respiratory viruses, bacteria, fungi, and tuberculosis. Disposable plastic tips reduce but don’t eliminate the risk, because the entire apparatus remains shared. Herpes simplex virus, which can spread through saliva on a mouthpiece, is a commonly cited concern in clinical literature on hookah-related infections.
Hookah Lounge Air Quality
You don’t have to be the one smoking to be affected. Air quality studies inside hookah lounges have found alarming levels of fine particulate matter (PM2.5), the tiny particles that penetrate deep into lung tissue. In one set of measurements from Oregon, every hookah lounge tested had air rated at least “unhealthy,” and two reached “hazardous” levels. A study in Toronto recorded indoor PM2.5 concentrations averaging about 1,419 micrograms per cubic meter, roughly 69 times the level in ambient outdoor air. For context, the World Health Organization’s guideline for 24-hour PM2.5 exposure is 15 micrograms per cubic meter.
Even the non-smoking sections of hookah cafes had particle levels comparable to restaurants where cigarette smoking was allowed. If you’re sitting in a hookah lounge for an evening, you’re breathing secondhand smoke with significant levels of carcinogens, carbon monoxide, and heavy metals whether you pick up the hose or not.
Herbal and Tobacco-Free Shisha Isn’t Safe Either
Switching to herbal or tobacco-free shisha doesn’t solve the problem. Researchers at the University of Alberta tested popular brands of herbal shisha and found toxic metals like chromium, nickel, and arsenic in the smoke. They also detected carcinogenic compounds, including chrysene and naphthalene, at levels matching or exceeding those found in cigarette smoke. Analysis from the University of Beirut found that herbal shisha smoke actually contains up to three times more tar than tobacco shisha.
This makes sense once you understand the source of the harm. Much of what’s dangerous about hookah comes from burning charcoal and heating plant material at high temperatures, not exclusively from the tobacco itself. Combustion produces tar, carbon monoxide, and carcinogens regardless of whether the substance being heated contains nicotine. Secondhand smoke from herbal shisha contains formaldehyde and polycyclic aromatic hydrocarbons at levels equal to or greater than secondhand tobacco smoke.
Risks During Pregnancy
Animal research has shown that exposure to hookah smoke during pregnancy significantly reduces birth weight and increases the rate of newborn death. In one study, offspring in the hookah-exposed group weighed roughly 25% less than controls at birth, and survival after delivery dropped from 97% to 82%. The exposed offspring also grew more slowly during the first three months of life. While these are animal findings, they align with what’s known about how carbon monoxide and nicotine restrict oxygen and nutrient delivery to a developing fetus, and they reinforce that hookah use during pregnancy carries serious risks.