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RomeoStevens comments on Lifestyle interventions to increase longevity - Less Wrong
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On eating more fish: How worried should I be about mercury poisoning? Is it worthwhile to carefully select fish for low mercury content?
For instance, one guy on /r/fitness reports that 2 cans of chunk light tuna a day gave him mercury poisoning; while you're not recommending that much fish, I'd expect that health detriments appear long before full-blown mercury poisoning.
(I'm not expecting you in particular to tell me this, I just want to know if someone on LW has already done this research.)
Oh yeah, salmon is easily the best for health benefits AFAIK. I should include this in the post.
Must be wild salmon, not farmed salmon. The difference in Omega 3/6 ratio is immense.
Is tuna all right if I have a hard time getting salmon? I can get tuna salad at the grocery store or tuna sandwiches for lunch comparatively easily, but salmon can be expensive here.
I was going to recommend kipper, but this says it's not that much better than tuna. It's still better, at least in terms of mercury.
This PDF says canned sardines have 1 gram EPA+DHA per 100g, whereas herring has slightly more and tuna is all over the place.
Not very good evidence for kipper vs. sardines (I buy kipper just because I can't stand sardines, though I'll look out for salmon now that it's been mentioned), but either looks to be preferable to tuna.
Tuna has among the highest mercury content per serving IIRC.