AFAIK, no study has demonstrated a risk of mercury poisoning from wildcaught fish. While some tuna do have higher levels, the selenium also present reduces the bioavailability of the mercury. I eat canned fish five or six times per week. One is usually albacore for its favourable DHA profile
Why I don't worry about cholesterol:
Lyon Diet Heart Trial
Get With The Guidelines admission data
Sydney Diet Heart Study revisited
INTERHEART Study
Primary Prevention of Cardiovascular Disease with a Mediterranean Diet
The problem with modern medicine is that doctors don't view the prescription of drugs as a failure to keep you healthy