Certain fatty-acids “are not produced” by the organism. They
are called “essential fatty-acids”. As they are necessary to
the constitution of the cellular membranes, sometimes it is
necessary “to regulate” the food mode when they are in
insufficient quantity.
See: Below, partial analyses of the composition of
the fatty-acids in blood:
Saturated fatty-acids

Omega 3
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Omega 6
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Omega 9
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