I know fish has its laundry list of benefits, but surely consuming a large amount can have detrimental effects due to mercury, microplastics and PCBs, yet it doesn’t seem to affect blue zones like Okinawa where their citizens outlive most other nations (with a large amount of centenarians) and consume large amounts of fish.
Why is this?
In: 5
Other answers have covered the dietary question, but one thing contributing to lifespan in places where there is a concentration of significantly longer-than-average lifespans is a low-stress, slow-paced, repetitive lifestyle.
In many so-called blue zones, the average person’s life really doesn’t look too much different at age 90 than it did at age 20 or 40 or 70. Having a relatively small gap between the social safety net and the social ceiling sets the stage for a long life, and de-risks a person’s life considerably. That said, it’s often not the life trajectory many people would want.
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