Flaxseed is the seed from the plant Linum usitatissimum. The seed or the seed oil is used to make medicine. The information on this page concerns medicine made from the SEED only. There is a separate listing for flaxseed OIL.

People use flaxseed for many conditions related to the gastrointestinal (GI) tract, including ongoing constipation, colon damage due to overuse of laxatives, diarrhea, inflammation of the lining of the large intestine (diverticulitis), irritable bowel syndrome (IBS) or irritable colon, sores in the lining of the large intestine (ulcerative colitis), inflammation of the lining of the stomach (gastritis), and inflammation of the small intestine (enteritis).

Flaxseed is also used for disorders of the heart and blood vessels, including high cholesterol, “hardening of the arteries” (atherosclerosis), high blood pressure (hypertension), and coronary artery disease.

Flaxseed is also used for acne, attention deficit-hyperactivity disorder (ADHD), kidney problems in people with a disease called systemic lupus erythematosus (SLE), symptoms of menopause, and breast pain. It is also used for diabetes, obesity and weight loss, HIV/AIDS, depression, bladder infections, malaria, and rheumatoid arthritis.

Other uses include treatment of sore throat, upper respiratory tract infections (URTI), and cough.

Some people use flaxseed to lower their risk of getting weak bones (osteoporosis) and to protect against breast cancer, lung cancer, colon cancer, and prostate cancer.

Flaxseed is sometimes applied to the skin for acne, burns, boils, eczema, psoriasis, and to soothe inflammation.

How does it work?

Flaxseed is a good source of dietary fiber and omega-3 fatty acids. The fiber in flaxseed is found primarily in the seed coat. Researchers believe this fiber binds with cholesterol in the intestine and prevents it from being absorbed. Flaxseed also seems to make platelets, the blood cells involved in clotting, less sticky. Overall, flaxseed’s effects on cholesterol and blood clotting may lower the risk of “hardening of the arteries” (atherosclerosis).

Flaxseed is sometimes tried for cancer because it is broken down by the body into chemicals called “lignans.” Lignans are similar to the female hormone estrogen-- so similar, in fact, that they compete with estrogen for a part in certain chemical reactions. As a result, natural estrogens seem to become less powerful in the body. Some researchers believe that lignans may be able to slow down the progress of certain breast cancers and other types of cancers that need estrogen to thrive.

For systemic lupus erythematosus (SLE), flaxseed is thought to improve kidney function by decreasing the thickness of blood, reducing cholesterol levels, and reducing swelling.
FLAXSEED: Uses, Side Effects, Interactions and Warnings - WebMD
Find patient medical information for FLAXSEED on WebMD including its uses, effectiveness, side effects and safety, interactions, user ratings and products ...
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When my doctor made this suggestion, I got on my trusty laptop and did a little research. I was surprised to read that whole flaxseed and ground flaxseed are rich in the precursor to omega 3 acids, but the whole and ground seed may cause unwanted symptoms in the intestines and other potential problems such as decreased clotting times and interference in hormone cycles for women. Again, these effects are caused when taking excess amounts of flaxseed, not flaxseed oil. This excerpt was taken from the Mayo Clinic's website:

.....flaxseed or flaxseed oil taken by mouth may cause mania or hypomania in people with bipolar disorder. In theory, the laxative effects of flaxseed ( not flaxseed oil) may cause diarrhea, increased number of bowel movements, and abdominal discomfort. Laxative effects are reported in several studies of people taking flaxseed or omega-3 acids. People with diarrhea, irritable bowel syndrome, diverticulitis, or inflammatory bowel disease (Crohn's disease or ulcerative colitis) should avoid flaxseed due to its possible laxative effects. Nausea, vomiting, and abdominal pain are reported in two individuals shortly after taking flaxseed products by mouth; these reactions may have been caused by allergy.

Large amounts of flaxseed by mouth may cause the intestines to stop moving (ileus). People with narrowing of the esophagus or intestine, ileus, or bowel obstruction should avoid flaxseed ( not flaxseed oil). Individuals with high blood triglycerides should avoid flaxseed and flaxseed oil due to unclear effects on triglyceride levels in animal research. People with diabetes should use caution if taking flaxseed products by mouth, as the omega-3 fatty acids in flaxseed and flaxseed oil may increase blood sugar levels.

One study reports that the menstrual period may be altered in women who take flaxseed powder by mouth daily. Due to the possible estrogen-like effects of flaxseed ( not flaxseed oil), it should be used cautiously in women with hormone sensitive conditions such as endometriosis, polycystic ovary syndrome, uterine fibroids, or cancer of the breast, uterus, or ovary. Some natural medicine textbooks advise caution in patients with hypothyroidism, although little scientific information is available in this area. Flaxseed and flaxseed oil may increase the risk of bleeding, based on early studies that show decreased clotting of blood. Caution is advised in patients with bleeding disorders, in people taking drugs that increase the risk of bleeding, and in people planning to undergo medical, surgical, or dental procedures. Dosing of blood-thinning medications may need to be adjusted. In animal studies, flaxseed has increased the number of red blood cells.
at: www.wellsphere.com/wellpage/laxative-effect