do cigarettes improve concentration Smoking Effects on the Brain: What You Need to Know Nicotine: The Cognitive Benefits and

According to a study, the prevalence of hair loss and premature hair graying (PHG) is more prevalent in smokers than nonsmokers (The Effects of Smoking on Hair Health: A Systematic Review, Babadjouni et al., 2021)

this can lead to physical harm from falling after losing balance, becoming the victim of a crime like assault or rape, and drug overdose

Using the most up-to-date definition of abnormal sperm from the World Health Organization, the researchers found that smokers have lower sperm counts, poorer sperm movement, and more irregularly shaped sperm than nonsmokers

specifically, they show that stricter regulations on e-cigarettes increase youth smoking (Friedman et al., 2024