What are EFAs?
Omega-3 and Omega-6
(n-6) fatty acids constitute the two families of Essential Fatty Acids
(EFAs).
EFAs are considered "essential" because they are needed throughout
the human life cycle, cannot be produced in the human body, and therefore
must be provided through the diet.
EFAs aid in the maintenance of cell membrane fluidity and
stability, development and function of brain and nerve tissue, oxygen
transfer and energy production, immune functions, and conversion into
compounds involved in all body functions including local hormones governing
inflammatory responses.
Metabolic Pathways of Essential Fatty
Acids
A look at the metabolism of and interaction between Linoleic
acid (LA) and Alpha-Linolenic acid (ALA) will provide insight for the
significance of balancing EFAs.
LA of the Omega-6 family is found in most plant oils (corn,
safflower, canola, sunflower), nuts, seeds, and soybeans. ALA of the Omega-3
family is found only in oil from cold water marine animals (cod liver
oil, sardines, mackerel, anchovies) and flax oil.
Omega-3 fatty acids from fish is a direct source of
EPA and DHA, while flax seed oil yields ALA which then must be converted
into EPA and DHA. The human conversion of ALA to EPA and DHA is slow,
only a maximum of 15% of ALA (flax seed oil) can convert to EPA and 5%,
in any at all, may convert to DHA. Although flax seed has many benefits,
it is not recommended as a source of Omega-3 EPA and DHA fatty acids.
Lifestyle and health influences that can inhibit the
conversion include:
- a diet high in LA (Omega-6), trans-fatty acids,
and saturated fats
- alcohol intake
- deficiency of any of the vitamin and mineral
cofactors ( vitamin B3, B6, C, zinc and magnesium)
- diabetes
- immune dysfunction
Prostaglandin Health
EFAs are the building blocks for prostaglandins,
a class of hormones that regulate numerous bodily functions, including
governing cellular responses, immune function, and hormone synthesis.
Series 1 and 3 Prostaglandins (PGE-1
& PGE-3) are anti-inflammatory while Series 2 Prostaglandins
(PGE-2) are pro-inflammatory. PGE-3 comes from Omega-3 essential fatty
acids, PGE-1 comes from medicinal Omega-6 fatty acids and PGE-2 comes
from cooking oils.
PGE-1 & PGE-3 have the following effects:
- Reduce inflammation
- Dilate blood vessels
- Reduce blood clotting
- Lower harmful LDL cholesterol
level
- Raise beneficial HDL cholesterol
level
*These statements have not been
evaluated by the Food and Drug Administration. This product is not intended
to diagnose, treat, cure or prevent any disease. |