FATS
“Fat” has become a negative word as it is associated with obesity, yet we do need a
certain amount of fat in our diets and on our bodies. The point to keep in mind is that
there are good fats and bad fats.
The good fats are the unsaturated fats, namely, the monounsaturated fats (olive,
canola, and peanut oil) and polyunsaturated fats. The polyunsaturated fats provide
us with essential fatty acids (EFAs), which are broken down into two groups:
• Omega-6 fatty acids: Linoleic acid (LA), which is converted into gamma-linolenic
acid (GLA) and arachidonic acid (AA)
• Omega-3 fatty acids: Alpha-linolenic acid (ALA), which is converted into eicosap-
entaenoic acid (EPA) and docosahexaenoic acid (DHA) 10 | Chapter 1
The body cannot make EFAs, so they must be obtained through diet or supple-
mentation. They are essential for many body processes and functions, including:
•Growth and development of brain, nervous system, adrenal glands, sex organs, in-
ner ear, and eyes
•Energy (fat is the most concentrated source of energy)
•Absorbing fat-soluble vitamins (vitamins A, D, E, K, and carotenoids)
•Maintaining cell membrane integrity
•Regulation of cell processes such as gene activation and expression, enzyme func-
tion, and fat oxidation
•Production of hormones and chemical messengers
Food Sources
Here is a breakdown of the EFAs and their sources:
• LA: Found in vegetable oils such as saffl ower, evening primrose, sunfl ower, corn,
hemp, canola, and olive oil.
• GLA: Found in borage, blackcurrant, and evening primrose oils.
• AA: Found in meat and eggs. We get adequate AA through diet. Too much of this
fat is not good, as it causes infl ammation.
• ALA: Found in fl axseed and hemp oil and, to a lesser extent, in nuts, green leafy
vegetables, wheat germ, and blackcurrant seeds.
• EPA and DHA: Found in fatty fi sh, such as salmon, mackerel, herring, cod, sardines,
and tuna.
There is great controversy over what constitutes the optimal dietary intake ratio of
omega-6 to omega-3 fatty acids. It is estimated that we currently get around 15:1,
whereas leading EFA authorities recommend a ratio closer to 4:1 or even 2:1.
The Institute of Medicine has set an adequate intake level for linoleic acid for
adults 19–50 years of age at 17 g/day for men and 12 g/day for women; alpha-lino-
lenic acid at 1.6 g/day for men and 1.1 g/day for women. These levels are lower for
younger and older individuals.
Rather than trying to calculate the perfect ratio or intake, aim to have more
omega-3s (fi sh, fl axseed, hemp, and fi sh oils) and GLA (borage, blackcurrant, or
primrose oil) from diet and/or supplements, as these are the benefi cial fats that are
commonly defi cient.
Diets rich in the omega-3 fatty acids offer cardio protection by lowering blood
cholesterol and triglyceride levels, reducing blood clotting, and reducing the risk of
heart attack and sudden death. These fats also reduce infl ammation and are helpful
for arthritis and other infl ammatory disorders. GLA also reduces infl ammation, and
prevents clotting, dilates blood vessels, improves skin health, and benefi ts those with
diabetes and arthritis
Tags: adrenal glands, arachidonic acid, cell processes, chemical messengers, essential fatty acids, fat soluble vitamins, gamma linolenic, gene activation, good fats and bad fats, great controversy, green leafy vegetables, membrane integrity, monounsaturated fats, omega 3 fatty acids, omega 6 fatty acids, polyunsaturated fats, sex organs, wheat germ
