Donabee.com Health & Wellness



 
Diabetes
Type II Diabetes is an epidemic today and yet it is 100% preventable. It is a dietary issue that has gotten out of control. You can control it with diet. Read More.
 
 Diseases
More than 70 of the diseases we all fear are caused by free radicals and oxidative stress. Read More
 
Losing Weight
Huge issue. 60% of the people are overweight. Diabetes II is an epidemic. People can't lose weight. Want to know why? Read More
 



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Omega 3

Long before the FDA said Omega three might be a healthy thing to consume, there was much talk about the potential value of increasing our intake of Omega 3 fatty acids.

In 2004 the FDA issued a "qualified health claim" for two types of omega-3 fatty acids (eicosapentaenoic acid - EPA and docosahexaenoic acid - DHA). The FDA report said "there is supportive but not conclusive research to show that these fatty acids are beneficial in reducing the risk of coronary heart disease."(1)

The American Heart Association had been reporting the benefits of omega-3 since 1996. The Science Advisory report was titled "Fish Consumption, Fish Oil, Lipids and Coronary Heart Disease". Then in 2002, the AHA released a new report indicating how omega-3 reduced the risk of cardiovascular disease. It said omega-3's make the blood less likely to form blood clots that cause heart attacks and protect against irregular heart beats that cause sudden cardiac death.

In addition to that finding, it was also found that omega-3 decreases triglyceride levels as effectively as any cholesterol medication and lowers blood pressure slightly.

What are essential fatty acids?

Essential fatty acids are polyunsaturated fatty acids that the human body needs for metabolic functioning but cannot produce and therefore had to obtain from food.

What are omega-3 fatty acids?

Omega-3 fatty acids are a class of essential polyunsaturated fatty acids. Omega-3 fatty acids are found in food such as anchovies, bluefish, carp, catfish, halibut, herring, lake trout, mackerel, pompano, salmon, striped sea bass, tuna (albacore), whitefish, walnuts, flax seed oil and canola oil.

There are six main types of omega-3 fatty acids:

bulletAlpha-linolenic acid (ALA).
bulletStearidonic acid.
bulletEicosatetraenoic acid.
bulletEicosapentaenoic acid (EPA).
bulletDocosapentaenoic acid.
bulletDocosahexaenoic acid (DHA)

EPA and DHA seem to offer the most benefits. Fish oil contains both of these fatty acids. That is why it is recommended to eat certain fish at least twice a week.

Alpha-linolenic acid is found in flax seed, olive oil, soy bean, lin seed and certain nuts.

Do you have to eat fish in order to get omega-3?

No, you can also get omega-3 from other sources like:

bulletFish oil supplements
bulletFlax Seed or flax seed oil
bulletSome eggs depending on what the chickens are feed such as 10-20% ground flax seed

How much omega-3 should you consume?

The AHA suggests people with coronary heart disease should consume a gram of EPA and DHA each day, preferably  from fatty fish.

People without coronary heart disease should eat fatty fish at least twice a week. They should also eat foods rich in alpha-linoleic acid such as flax seed, canola oil, soy beans and walnuts.

It is recommended that no one should consume more than three grams of omega-3 a day. No more than 2 grams should come from a dietary supplement.

How much fish would you have to eat to exceed 3 grams?

You would have to eat about 640 grams of cod to get one gram of EPA and DHA. But it would only take about 55-85 grams of sardines and between 55-235 grams of mackeral to reach one gram. It would take five grams of cod liver oil.

What about contamination of the fish?

Certain species of fish can be high in levels of mercury or PCB's. These tend to be older, predatory fish who are higher in the food chain. Health Canada has issued guidelines on shark, swordfish and tuna. Pregnant woman and children should eat no more than one meal a month of these fish.

What are the risks from consuming omega-3 fatty acids?

If you do consume more than 3 grams a day your risks could be:

bulletIncreased bleeding
bulletPossible hemorrhagic stroke
bulletIncreased levels of low-density lipoproteins choloesterol or apoproteins associated with LDL cholesterol among diabetics and hyperlipidemics
bulletReduced glycemic control among diabetics
bulletSuppression of immune and inflammation responses leading to increased susceptibility to opportunistic bacteria

Omega-6 to omega-3 consumption

The average American consumes about 1.6 grams of omega-3 fatty acids each day, of which about 1.4 grams (~90%) comes from linolenic acid, and only 0.1-0.2 grams (~10%) from EPA and DHA. In Western diets, people consume roughly 10 times more omega-6 fatty acids than omega-3 fatty acids. These large amounts of omega-6 fatty acids come from the common use of vegetable oils containing linoleic acid (for example: corn oil, evening primrose oil, pumpkin oil, safflower oil, sesame oil, soybean oil, sunflower oil, walnut oil, and wheat germ oil). Because omega-6 and omega-3 fatty acids compete with each other to be converted to active metabolites in the body, benefits can be reached either by decreasing intake of omega-6 fatty acids or by increasing omega-3 fatty acids.(2)

Links:

bullet

Questions and Answers
Qualified Health Claim for Omega-3 Fatty Acids
- Center for Food Safety and Applied Nutrition - FDA

 

Footnotes:

bullet

(1)Omega-3 Fatty acids your heart loves - CBC News January 15, 2007

bullet

(2)Omega-3 fatty acids, fish oil, alpha-linolenic acid - Mayo Clinic Drugs

 

horizontal rule

These statements have not been evaluated by the Food and Drug Administration. This web page or any products found here are not intended to diagnose, treat, cure, or prevent any disease. If you find information here that is of interest to you, take it to your medical doctor for conversation and evaluation. Do not stop taking any prescription drugs without consulting with your medical doctor.

2007 Donabee.com - All Rights Reserved