According to the research, genetic variations that cause schizophrenia are common in the general population. This means that all people carry these genetic variants. The research was a study done by The University of Queensland’s Queensland Brain Institute (QBI), The University of Queensland Diamantina Institute (UQDI) and the Queensland Institute of Medical Research (QIMR).

While previous studies have pinpointed several genes along with rare chromosomal deletions and duplications associated with the disease, these account for less than three per cent of risk of schizophrenia.

But the new method found that about a quarter of schizophrenia is captured by many variants that are common in the general population.  http://au.ibtimes.com/articles/301706/20120221/genes-genetic-analysis-schizophrenia.htm

Things started changing at the age of 15, 16 when my son started smoking Cannabis and hanging around with his friends more than he was at home.  By the age of 18 or 19 he smoked pot on a fairly regular basis to the point he got caught high in class, when he was in his second year in electronic engineering at college .  Every time he and I would have discussions regarding his addiction he would shrug it off by saying it is not addictive.  Ask him today, he will tell you how addictive it is. This is where I feel we need the right information accessible to our youth so they can make an informed choice. Also to everyone that thinks it will never happen to them.

At the age of 23, my son was diagnosed with paranoid schizophrenia with bipolar tendencies.