Yes, if you're going to smoke a substance please do take the time to separate the myths from the facts about its health consequences.

http://www.drugpolicy.org/marijuana/factsmyths/
MYTH: MARIJUANA KILLS BRAIN CELLS. Used over time, marijuana permanently alters brain structure and function, causing memory loss, cognitive impairment, personality deterioration, and reduced productivity.

FACT: None of the medical tests currently used to detect brain damage in humans have found harm from marijuana, even from long term high-dose use. An early study reported brain damage in rhesus monkeys after six months exposure to high concentrations of marijuana smoke. In a recent, more carefully conducted study, researchers found no evidence of brain abnormality in monkeys that were forced to inhale the equivalent of four to five marijuana cigarettes every day for a year. The claim that marijuana kills brain cells is based on a speculative report dating back a quarter of a century that has never been supported by any scientific study.
ermitonto Reviewed by ermitonto on . Inhaled Smoke? Does the THc absorb in the lungs, intantly, when the smoke enters or are you suppost to keep in the smoke? and for how long do you hold it in? Rating: 5