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Thanks fo the complement Tom.
I am not always around it just depends what I am up to.
Your post is a to the point simplification of a complex subject.
Linoleic n6 series and linolenic n3 series cannot be made by the body and are essential in small balanced amounts to human health. They are not interchanageable the body cannot make one from the other.
EPA and DHA (found in oily fish conviently packaged for us) are made by the human body but not always well, and hence the often made suggestion of nutritional people to take supplements of EPA DHA. Trials show the bodies take up tails of at about 2g per day.
Most vegetable / seed / nut oils oils except flax and perillia and olive are high in omega six and so to balance the threes and sixes they really need to be avoided. (the whole foods are ok in sensible mix and balance but not the oils which for some implies big changes out with the chip pan frying pan in with steamer stews casseroles etc, amost all processed food is out the window until they stop putting vegetable oil into everything etc.).
The problem is you find them EVERYWHERE in "processed" food, margerine etc etc and so have to become an avid label checker. (OLIVES IN OIL SUNFLOWER!!!!! WAS MY LATEST FIND !)
Lots greens are good for all sorts of reasons and add some beans for fibre seems to be common dietary advice.
Omega nine is more complex The body can make omega nine but maybe appreciates being saved the effort.
Olive oil (like many whole foods) contains other useful substances that are beleived by some on the basis on various trials to help reduce BC risk.
I know nothing about omega nine / olive oil and herceptin resistance. I have seen the small wiff of smoke in my reading that variation of fat intake may impact on herceptin resistance. Fats omega threes and possibly sixes certainly meet share some communality in pathways where they act and have been reported in reducing risk of HER possibly, and MAYBE impact on herceptin resistance either by somehow helping herceptin OR by helping the body do what it needs to do in terms of providing fats and so save the body having to desparately drive hard to find new ways to do whatever it is trying to do reulting in it blocking herceptin. Do not misunderstand me - my hunch is that these fats and herceptin have more in common than we are currently hearing, but it is only that hunch and straws in the wind, and on this I may be totally wrong.
In summary on omega three and six. For me there are so many signposts even if the exact road is not clear that a diet that balance threes and sixes is a good bet for better health and lower BC risk.
As you said in our world of oversupply of omega six in very simplistic terms
Balance your omega three and six
Threes ( because they are hard to find) GOOD
Sixes (because they are almost unavoidably everywhere) BAD
Nine (quality olive oil cold pressed and remember 10% of a lot is still a lot of six compared with most peples intake of three)
DHA EPA 2grams or so a day some take more some take less.
Take Flaxseed and flaxseed oil to balance threes.
As high a variety as possible and moderation.
As always it is more complex - some take a lot more fish oil to balance the sixes - it maybe they work against diseases because they are highly oxidised maybe linolenic in flax seed is better as more stable. I simply cannot give you any answer on it.
Generally check with your advisor before any change in diet - these fats are heap powerful in the way they function and it is even more complex where treatments are involved.
I wish I could give you definative and simple answers but I cant it is simply too complex and there have not been enough sensibly directed trials (eg based on body fat rather than memories and impressions of dietary intake coloured by the human dynamic).
However I would not be spending the time I am and have changed my own diet if I did not think it was the right direction if that is of any comfort.
RB
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