@revan2424: Increased Heart Rate which means more chances of a heart attack, decreased blood pressure and damaged blood vessels caused by the smoke. Lung damage as the smoke from marijuana contains many of the same toxins, irritants, and carcinogens as tobacco smoke. Not to mention it's multiple effects on the brain.
Couple of things.
Yes, increased heart rate is a thing, and is the main pitfall of mary jane. However, it rarely does ever contribute to an actual heart attack. However it may not be due to the marijuana itself. According to a study, it may very well be other factors, such as the carbon monoxide from smoking it, or burnt plant particles.
I don't see how lowering blood pressure is an inherently bad thing. Marijuana is a known hypotensive, and has been used medicinally because of which.
And about the damaged blood vessel,bit. That's because of smoke. Not the pot itself. Smoking is not the only way to use marijuana. Same goes for the lung damage.
And unless it's on a developing brain, marijuana's effects on the brain's health is minute.
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