Alright guys my friend has been a little anxious since he found out that his brother has begun using marijuana at the age of 15. I'm not sure what to think of it so I'm asking you if he will suffer any long term effects from starting at this age. My friend sat him down and talked to him and found that on average he smokes about once every 7-8 days. Each time he smokes, it is somewhere between .1 to .5 grams. He has never increased in how much he consumes since he started back almost a year ago. Could this lead to any long or short term effects? He is inclined to stop if there are any consequences from his activities.