Key strengths include the exceptionally large sample size, long follow-up, and detailed adjustment for clinical, behavioral, and socioeconomic confounders, allowing robust assessment of interactions between initiation age and smoking intensity
However, it's important to note that individual responses to smoking can vary, and other factors such as lifestyle, genetics, and overall health can influence testosterone levels
8 hours Nicotine is addictive largely because its absorbed into the bloodstream quickly, leading to the release of adrenaline and dopamine (and giving you that familiar headrush), and wears off quickly causing you to seek the hit again and again
For these reasons, the AAP recommends that the legal age to purchase tobacco products be raised to 21
"Guindon & Boisclair" 2004, pp