I tried fish oil for a while when people were touting it. Didn't seem to do anything for me.

The idea that the Inuit adapted to eating fatty food was very plausible, said Anthony G. Comuzzie, a geneticist at the Texas Biomedical Research Institute in San Antonio who was not involved in the study. But he cautioned that natural selection might not have favored the FADS variant but a neighboring, as yet unknown piece of DNA that conferred evolutionary advantages.

It doesn't sound like they're very clear on which gene is responsible for allowing the Inuit to only eat fish and meat with no ill effects.

It would be great to be able to get a DNA test and know which foods would be most healthy for that particular individual. Just from this article, there seems to be too many unknowns for that to be happening for a quite some time.