Teenagers who are bisexual, gay or lesbians are at a higher risk for severe mental disorders than compared to their peers that are heterosexual. Bullying, self-loafing and stress hormones also play a role and are linked to the impacts these teenagers suffer from as a result of being victimized and rejected because of their sexual preferences.
Concordia University Study
The study examined the “link between living in a homophobic environment and 'internalized homophobia,' e.g., feeling negatively about oneself because of one's sexual identity as LGB.” Students who were more internalized shows signs of the stress hormone being produced more rapidly compared to the teens that received less criticism and rejection for their sexual preference. The teens who were scrutinized had a much lower suicide rate than their peers.
Conclusion
This study is a very small portion of a much larger study that looks at the effects of teenagers who are rejected, bullied, internalized, and menaced about their sexual preference and how it effects these teens mental. The message that researchers and scientists are trying to get out to teenagers is "We need to promote acceptance and respect for the diversity of our population -- including sexual diversity -- at all levels: government, community, schools and homes."
Source: http://www.sciencedaily.com/releases/2011/02/110202114957.htm