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It seems to me that the most likely explanation is that the Mead acid (n-9 PUFA) can co-exist with the n-3 and n-6 PUFAs which seem to be present even in the animals at wild. The experts probably screwed it up by claiming that Mead acid appears only in the absence of the n-3/n-6 "EFAs". There is probably some threshold for the "EFAs" beyond which the synthesis of Mead acid is greatly suppressed. But this is all just speculation because no one has apparently looked for the presence of Mead acid in the wild animals.
It may be even possible, that humans can do well with "EFAs" within their natural life span which is ~40 years. The "chronic" diseases usually develop after this age. But if they want to live past what the evolution set as their reproductive age it may be advantageous to remove the EFAs from their bodies. EFAs may be indeed "essential" for the reproduction and growth but can backfire later like the TOR/insulin signaling is said to do. Some scientists say that the aging is just uncontrolled run out of the developmental program past the reproductive age - perhaps we can suppress its deleterious effects by reducing the "EFAs" ... |
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