Egg yolks have a very high level of choline in them. Choline is necessary for nerve cell wall repair, and for making acetylcholine which is an important neurotransmitter.
It is difficult to find other food sources to make up for egg yolks if people avoid them.
http://lpi.oregonstate.edu/mic/other-nutrients/choline
Choline is involved in the methylation cycle too. Check out the diagram on the Oregon State Univ. link above.
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Weezie looking at petunias 8.25.2017
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