From the United Nations:
Rates of poverty, homelessness, depression and suicide have been found to be far higher among lesbian, gay, bisexual and transgender people than in the general population. But it’s not just LGBT people who pay the price. We all do. Every LGBT child thrown out of home and forced to miss out on education is a loss for society. Every LGBT worker denied their rights is a lost opportunity to build a fairer and more productive economy.
More info at United Nations/Free & Equal.