Peer-reviewed research concerning smoking, summarized and appraised in plain language with every source cited.
This study set out to examine how modifiable lifestyle factors like smoking, drinking, and weight affect semen quality in men. It analyzed data from over 3,300 men visiting a fertility…
This study looked at what drives low testosterone in U.S. men, going beyond aging to include habits and life circumstances. It analyzed over 10,000 men aged 18 and up from…
This study looked at whether a heart-healthy lifestyle is linked to better sperm quality in young men, using the American Heart Association's Life's Essential 8 score. That score rates eight…
This review gathers recent evidence on what damages male fertility and how much of it can be undone. Smoking raises sperm DNA fragmentation (breaks in the genetic material inside sperm)…
This study looked at how lifestyle and hormones affect semen quality and sperm DNA health in men. It examined 278 Indian men aged 21 to 50, measuring sperm count, movement,…
This scoping review set out to map the evidence on how psychosocial work factors affect male fertility and sperm quality. It analyzed 18 peer-reviewed studies from 1990 to 2024, focusing…
This review looked at how nicotine affects sperm function, focusing on its impact on key sperm nuclear proteins. It gathered evidence from studies on nicotine's role in sperm production and…
This systematic review and meta-analysis set out to find which lifestyle, environmental and health factors go with higher sperm DNA fragmentation, meaning breaks in the genetic material inside sperm, where…
This study set out to examine how cigarette smoking affects semen quality, hormone levels, metabolic health, zinc levels, and sperm DNA damage in young Russian men. It compared 450 smokers…
This study set out to see whether testosterone in men varies with the season, independently of age, weight and existing illness. It used the medical records of 27,328 Israeli men…
This study set out to see how combined lifestyle factors affect the risk of death from any cause, heart disease, and cancer in Chinese men. It followed over 61,000 men…
This study set out to see if quitting smoking helps Japanese men live longer, given that Japan has had high smoking rates among men. Researchers followed 1,083 Japanese men aged…
This study looked at whether cutting back on cigarettes later in life affects how long men live. It tracked 4,633 Israeli working men who smoked in 1963, checked their smoking…
This study looked at whether stopping hot tubs, hot baths and whirlpools improves semen quality in infertile men. Eleven men with a regular wet heat habit were assessed before and…