Important Information On Flaxseed And Flaxseed Oil PDF Print E-mail
Friday, 11 September 2009 17:55
taken from http://www.flickr.com/photos/alishav/3462217890/ via creative commonsFlaxseed, called linseed in some countries, is a good source of dietary fiber, omega-3 fatty acids, and lignans. Each of these components may contribute to the health effects of eating flaxseed, but flaxseed oil contains no fiber and very little lignan. In addition to its presence in flaxseed oil, small amounts of ALA are also found in canola, soy, black currant, and walnut oils. Small amounts of lignans are present in a wide variety of foods of plant origin.

Flaxseed oil toxicity has not been reported. However, there is conflicting information about the effect of flaxseed oil and one of its major constituents, ALA, on cancer risk. While most test tube and animal studies suggest a possible protective role for ALA against breast cancer, one animal study and a preliminary human study suggested increased breast cancer risk from high dietary ALA.

Another preliminary human study reported that higher breast tissue levels of ALA are associated with less advanced breast cancer at the time of diagnosis. For prostate cancer, a test tube study reported ALA promoted cancer cell growth, but preliminary human studies have shown ALA to be associated with either an increased or decreased risk, or no change at all. Advocates of flaxseed oil speculate that a potential association between ALA and cancer may be due to the fact that meat contains ALA, thus implicating ALA when the real culprits are probably other components of meat.

In some studies, however, saturated fat (and therefore probably meat) were taken into consideration, and ALA still correlated with increased risk. The associations between ALA and cancer might eventually be shown to be caused by substances found in foods rich in ALA rather than by ALA itself.

taken from http://www.flickr.com/photos/nickwheeleroz/2195186572/ via creative commonsFlaxseed oil is not suitable for cooking and should be stored in an opaque, airtight container in the refrigerator or freezer. If the oil has a noticeable odor it is probably rancid and should be discarded. As with any source of fiber, flaxseed should not be taken if there is possibility that the intestines are obstructed. People with Scleroderma (systemic sclerosis) should consult a doctor before using flaxseed.

Although a gradual introduction of fiber in the diet may improve bowel symptoms in some cases, there have been several reports of people with Scleroderma developing severe constipation and even bowel obstruction requiring hospitalization after fiber supplementation.

Animal research suggests that large amounts of flaxseed or lignans consumed during pregnancy might adversely affect the development of the reproductive system. No studies have attempted to investigate whether this could be a problem in humans. Allergic reactions to flaxseed have occasionally been reported, but are considered very uncommon.

For promoting bowel regularlity, 1 tablespoon (15 ml) of whole or ground flaxseed is taken one or two times per day, accompanied by a full glass of water. When used to treat other health conditions, it is used in amounts of 30 to 35 grams (1 to 2 ounces) per day. Although it is not suitable for cooking, flaxseed oil (unlike fish oil) can be used in salads.

Some doctors recommend that people use 1 tablespoon (15 ml) of flaxseed oil per day as a supplement in salads or on vegetables to ensure a supply of essential fatty acids. Some conversion of ALA to EPA does occur, and this conversion can be increased by restricting the intake of other vegetable oils. For those who wish to replace fish oil with flaxseed oil, research suggests taking up to ten times as much ALA as EPA.

Typically, this means 7.2 grams of flaxseed oil equals 1 gram of fish oil. However, even if taken in such high amounts, flaxseed oil may not have the same effects as fish oil. But, flaxseed oil will not cause a fishy-smelling burp (a possible side effect of fish oil).

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