This is saying that cellular oxidative stress, redox imbalance, and lung inflammation (cell damage and inflation) seem to occur with eCigs and tobacco cigarettes, due to heavy metals and free radicals, in similar ways to tobacco, in tests on mice (we have different ethics for studying humans and it takes longer to get that data)
No, the sizes vary depending on the cigarette type and pack number
If you enjoy the act of chewing, there are tobacco-free products available that can give you a similar experience without harmful effects
Adipose stem cell treatment in mice attenuates lung and systemic injury induced by cigarette smoking
For instance, a 2024 research conducted on 1938 infertile men, including both smokers and non-smokers, found that smokers had: Low semen concentration Decreased sperm counts Low sperm motility Low sperm viability They also noted that heavy smokers had more disturbed semen parameters than moderate smokers