On: The Dunedin Study Has Been Studying Aging for 45 Y...

[i_feel_great]

You left out the other stuff about marijuana: lower IQ and higher risk of psychosis.

[martijnarts → i_feel_great]

You in turn left out the important note on that:

> these effects only occurred among those who smoked marijuana daily; more infrequent users suffered essentially none of these effects.

[jjtheblunt → martijnarts]

"essentially" = ?

[creep → i_feel_great]

Lower IQ and risk of psychosis if used daily.

As an anecdote, I noticed this in three of my friends who smoked daily for years (2-4 years), out of four friends who did and I didn't notice this at all in friends who smoked occasionally (out of... many friends).

[dominotw → i_feel_great]

Does it matter at what age you start smoking? What are the effects on ppl who start smoking daily in their mid thirties.