Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Why do we have to get them from our diet, and if they aren't taken in our diet we will face disease? Then why we don't have the enzymes which are require for EFA synthesis?

share|improve this question
It's not really like your body can decide like 'hey, lets synthesize the enzyme required to catalyze the reaction for the creation of this EFA'. Apparently, we're just fine without them due to ample EFAs in our diet. – pbond Jul 20 '14 at 18:08
Have a look at this topic:… – Chris Jul 20 '14 at 18:25
i don't understand will u plzz elaborate it more – Haya Dar Jul 20 '14 at 19:22
I would speculate that since essential fatty acids are so abundant in our diet, there was no selective pressure for the maintenance in our genome of the enzymes that produce them. – canadianer Jul 20 '14 at 20:36
@canadianer can you add more details if you can and post your comment as answer – WYSIWYG Nov 26 '14 at 13:02

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.