jfoster along with goodman intruducing new chemicals during the most critical time that your brain and psyche are devoloping and growing increases your chances of mental health problems.. such as depression, anxiety, panic attacks, can cause social problems, inhibition and really fuck up your metabolism which causes the physical problems... now all of the above are not guranteed to happen but more lickley then someone who starts smoking in their 20's

i was just diagnosed with hyperthroidism.... the thyoid basically controls your metabolism and how hard it works...in my case it over works and causes alot of strain on my body and especially my heart... i have no family history of it....my doctor believes that me begining to smoke during the main sprout of puberty may have effected it along with other inbalances...this coming from a man who believes weed is basically harmless compared to alcohole and other drugs..

now im 6' 3 so how weed affects you is different from person to person...and it would be ignorant to assume weed is completely harmless...