This study also opens up questions about previous studies that have found cardiovascular benefit by replacing animal fats with PUFAs -- those studies did not control for the fact that people were also increasing omega-3 PUFAs.
Do we know everything there is to know about how omega-6 fats affect our health? Of course not. But is the notion of an optimal ratio of omega-6 to omega-3 a myth with absolutely no data to support it? Hardly.
Advertisements are plentiful for all kinds of products and supplements that purport to improve longevity or fend off disease. What may be harder to find, however, are ways you can influence these yourself.