Flaxseed is rich in the important omega-3 and omega-6 essential fatty acids, like that found in salmon and other fish. As a general essential fatty acid (EFA) supplement, Flaxseed Oil or Seed is a nutritive food. Essential fatty acids are critical in the production of prostaglandins. In the body prostaglandins help regulate fat metabolism, inflammatory response, hormones, as well as the cardiovascular, immune and central nervous systems. Many physicians warn that modern diets may be too rich in Omega-6 fatty acids and depleted of Omega-3's, which can contribute to health concerns. To restore the proper Omega-6 / Omega-3 balance, some doctors recommend dietary supplementation of Omega-3 rich flax oil. Flaxseeds are the most abundant source of natural compounds which can be converted by bacteria in the digestive system to lignans, unique, natural compounds which demonstrate impressive health benefits. 

Symptoms of Deficiency or Need:
Benefits include positive effects in relieving menopausal hot flashes, as well as anticancer, anti-bacterial, antifungical, and anti viral activity. It is considered a curative in hardening of the arteries and elevated cholesterol levels. Other benefits are for allergies, cardiovascular health, cholesterol levels, circulation, eczema, eyesight, immune function, learning ability, nerve problems, osteo-arthritis, rheumatoid arthritis, viral illness, weight management, diabetes, blood pressure, inflammation, psoriasis, multiple sclerosis, ulcerative colitis, acne, dry skin, energy levels, PMS, mood swings, and liver problems.

Treatments:
Studies around the world have shown the benefits of using flaxseed oil showing impressive results including greatly boosting the immune system, anti-tumor activity, normalized blood pressure levels and inhibition of cancer cell growth. According to Dr. Johanna Budwig, a Biochemist and blood specialist who has been treating cancer of all kinds with Flaxseed Oil for over 16 years, people with cancer have blood that is low in Omega 3 and Omega 6 fatty acids. Flaxseed oil is 56% Omega 3 and 16% Omega 6. Accordingly, most people have blood that is 80% deficient in Omega 3. Dr. Budwig has taken patients sometimes with little time left to live and restored them to health.

Doctors had attempted to treat patients with sources of Omega 3 but had not been consistently successful. Dr. Budwig's research found that in order for these fatty acids to be fully available to the body, they must be tied to a sulfur based protein; the best natural source of which is cottage cheese (or MSM supplements). Depending on the severity of the condition she had her patients use 3 to 6 tablespoons of Flaxseed oil a day, with at least 4 oz or 1/2 cup of cottage cheese per day. She found that a yellowish green substance in their blood was replaced with a healthy red pigment, hemoglobin. She also found that the tumors receded and disappeared, anemia was alleviated, and vital energy was regained.

It took about 3 months for the changes to occur. During that time the symptoms of cancer, diabetes, or liver disease also disappeared. There are thousands of testimonials from former cancer sufferers that have been cured using Dr. Johanna Budwig’s approach to treatment. 

Suggested Dosage:
Oil or seed: 1-6 tablespoons per day.
Notes: Always prepare the seed fresh, by grinding it when you want it. Don't grind 
more than you'll use at a time as the EFA's in flaxseed are fragile and go rancid quickly.
Flax oil is also very unstable and very susceptible to going rancid. Store flax oil 
or ground flax seeds in a refrigerator for no more than 3 months. Flax oil should
not be exposed to heat. It has not yet been determined if there are any detrimental 
effects of exposing flax seed to heat. Many people with egg allergies use ground 
flax as an egg substitute when making breads, etc. Mix with water and bring to a boil,
you should get a thick gelatinous mass that binds flours together like egg does. 
Probably best is to just add the ground seed or oil to foods after they are prepared,
such as on a salad, over vegetables, pasta, or on top of cereals.

Where can you get it?
Buy fresh seed or oil at a health food store or grocery store.

References:
http://www.herbalremedies.com/flaxoilcan.html