As for male homosexuality, it's the lifestyle which is unhealthy. We are all sexual creatures and the laws of nature cannot be escaped by choices which are unhealthy. That goes for gay men and women, and nuns. Does the personal choice of sexual partners and the happiness in those relationships outweigh the physical dangers? That's why it's a choice. Excluding a healthy sex life from your time on earth is not good for one's health. That's straight or gay.
Another area to explore is the relative frequency of doctor visits between male homosexuals and male heteros. I would hypothesize that because of certain practices, gay men would visit their doctors more often. We know that the successful treatment of many forms of cancer depend on early detection.
The real disturbing thing I seem to see fairly often is obese homosexuals, I am not stereotyping, but seeing so many of the kind who are obese personally makes me wonder what serious kinds of health issues either came, or are coming down the road. Obesity is also a risk factor for cancer as well, so there you have another concern.