Flaxseed and Diabetes

Q: Is flaxseed beneficial for people with type 2 diabetes? Does it help my prostate gland as well?
– Desiree, Kansas
A:
Yes, flaxseed may help lower your sugar levels, and it plays a role in the prevention of prostate cancer as well. However, the strength of the evidence is too weak to permit definitive recommendations. Nonetheless, flaxseed is rich in alpha-linolenic acid (ALA), an essential fatty acid that appears to be beneficial in preventing heart disease and related illnesses. Flaxseed contains the right ratio of omega-3 to omega-6 fatty acids, is high in fiber, and provides a phytoestrogen called lignan, which may have antioxidant properties that protect against certain cancers.

There is some evidence that eating flaxseed reduces blood sugar levels after a meal and increases insulin levels because of its high content of soluble fiber. (It is 28 percent fiber, of which two-thirds is soluble.) Indeed, flaxseed carbohydrate (what remains after the oil is removed) was used in a study that showed a beneficial effect. Although this result was not duplicated in other studies, flaxseed has been shown to improve insulin sensitivity. An interesting, yet unproven, potential benefit may be the prevention of type 1 and type 2 diabetes; in animal models, flaxseed has been shown to delay the onset of the disease.

Flaxseed might help your prostatic health as well. In fact, the American National Cancer Institute has singled out flaxseed as one of six foods that deserve extensive research. Why? Because flaxseed contains a large amount of phytonutrients that serve as antioxidants, as well as those omega-3 fatty acids, which seem to play a role in preventing the formation of abnormal cells in the body. In terms of your specific question, flaxseed may reduce the prostate-specific antigen (PSA), a protein produced by the cells of the prostate gland that is often used as a marker for cancer. Also, men whose prostatic fluids contain high levels of lignan (the phytoestrogen found in flaxseed) seem to have a low risk of prostate cancer, though study results of this were not conclusive.

One word of warning: Flaxseed is high in calories. Here's an idea of how much you might need to consume to obtain its beneficial effects — 1 tablespoon of flaxseed has 5 grams of fat and weighs 12 grams. You need to take 40 to 50 grams of flaxseed, which is equal to about 4 tablespoons and has a total of 20 grams of fat. Milled flax has 36 calories per tablespoon; flax oil has 124 calories per tablespoon. (Flaxseeds are more nutritious than their oil.) These caloric considerations are important in the control of your glucose level.

Stay tuned, as I am sure there will be more studies that will guide us better in using flaxseed to stay healthy.