Fatty Acids are Needed for Growth :: fatty acids needed growth lipids central nervous system contain high proportions arachidonic 20 4 6 aa docosahexaenoic 22 3 dha two most important polyunsaturated brain levels linoleic 18 alpha linolenic low usually less than total innis s78 79 linoleic precursors elongated desaturated form clandinin 27 humans begins early third trimester Health Nutrition Papers Fatty Acids are Needed for Growth

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Fatty Acids are Needed for Growth

The lipids of our central nervous system contain high proportions of arachidonic acid (20:4 n-6, AA) and docosahexaenoic acid (22:6 n-3, DHA) which are the two most important polyunsaturated fatty acids in the brain. Levels of linoleic acid (18:2 n-6) and alpha-linolenic acid (18:3 n-3) are low, usually less than 1% to 2% of total fatty acids (Innis, S78-79).

Linoleic acid and alpha-linolenic acid are precursors to AA and DHA; they are elongated and desaturated to form AA and DHA (Clandinin, 27). The brain growth in humans begins early in the third trimester of pregnancy. This is the most important period for brain AA and DHA accumulation (Innis, S78-79). Therefore, the composition of fat in the brain during this period is very important for normal growth and development of the brain. Any changes in the balance of the fatty acids in the dietary fat intake will result in changes in the membrane functioning of brain cells.

During this prenatal life, lipids are mostly needed for structural and regulatory functions. After birth, the infant ... [to view the full essay now, purchase below]

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