Marijuana smoke may be as harmful to lung function as cigarette smoke.
An animal study reported as an abstract at the American Heart Association annual meeting found secondhand marijuana smoke to be as harmful as tobacco smoke. The endothelial function of the rats studied decreased 50-70% when exposed to secondhand marijuana smoke. This impairment did not depend on THC in the smoke, and was similar to tobacco smoke. (Reference: Wang X, et al "Brief exposure to marijuana secondhand smoke impairs vascular endothelial function" AHA 2014; Abstract 19538)
PositiveTip: Avoid exposure to secondhand smoke regardless of the source.
Exposure to secondhand smoke significantly increases pregnancy risks.
Women exposed to second hand tobacco smoke are at significantly increased risk of miscarriage, stillbirth and ectopic pregnancy--almost as much as if they were active smokers. This data comes from the very large Women's Health Initiative. The added risk ranged from 17% to 61% and was highest with the largest exposures in childhood, adult life, or at work.
PositiveTip: Avoid secondhand smoke as much as possible!
As little as 30 minutes exposure to secondhand smoke could cause blood vessel damage.
Those who do not smoke can suffer impaired blood vessel function with as little as 30 minutes of exposure to secondhand smoke. Researchers used concentrations similar to those encountered in real-life circumstances. This study reinforces the danger smokers pose to other people, let alone their own health.
PositiveTip: Support efforts to ban smoking in all public places--and avoid inhaling some one else's smoke.
Adolescence and adult exposure to secondhand smoke increases risk of hearing impairment
Second hand smoke (SHS) associated hearing losses of 15 dB or greater in adolescence is found to be proportional to the level of exposure. In adult former smokers SHS exposure risk, of at least a 25dB impairment, increased 30% and 40% for low/mid and high frequencies, respectively. Never smokers hearing impairment risk increased by 14% for low/mid frequencies.
PositiveTip: Avoid smoking and second had smoke to prevent tobacco smoke related hearing problems.