how many cigarettes is considered a smoker smoked per day in the U.S. 2023| Statista Chart: Smoking Isn't Fire |

Alcanzo, Qirui Li, Nadir Abuzeid, Xin Zhou, Peiying Feng, Dea Garcia-Hermoso, Sybren de Hoog One Health Mycology 2(1): 11-41 (2025)

Compensatory Smoking : Some smokers inhale more deeply or smoke more cigarettes to achieve the same nicotine level, potentially negating any light benefit

The effects on the different types of alcohol related cancers in previous research were still controversial 32,33,40,41,42,43 , but these studies included few Asian populations or did not adjust the interaction of smoking and other confounding factors

Strengths and limitations As it is difficult to recruit healthy men for semen parameters study, most of the studies were conducted on men attending infertility clinics in which they could have infertility, whether secondary to a male or female factor