Gosh this could be an essay.
But in essence long chain Omega 3 DHA is essential to brain function. It form 25% of the brain.
Many things block the ability of the body to make long chain Omega 3s. Some cancer treatments intervene in these fat pathways exactly how and to what end is not known.
Happily you can make sure you have enough DHA by supplementing.
Most in many western populations have lamentably low DHA intakes under 50Mg a day.
Just as important are adequate minerals including iodine and vitamin D and K. Increasing numbers in the population are showing shortages of these essential dietary elements.
RB
Author Omega Six The Devils Fat
(I am thinking about changing the title)
www.Omegasixthedevilsfat.com