Talk to your doctor about whether flaxseed oil supplements are right for you and if so, what the best dosage would be. Your age, health and medications could be important factors in this decision. Studies suggest a compound in flaxseed oil, alpha-linolenic acid (ALA), may help reduce swelling of joints in arthritis and reduce the risk of dying from heart disease, but these benefits haven't been proven. Taking too much flaxseed oil may cause diarrhea, and these supplements may interact with certain drugs.
Keep in mind that the amount of flaxseed oil in a single dose can vary by brand, with some capsules containing as little as 1,000 mg of flaxseed oil and 1 teaspoonful of liquid containing more than 4,000 mg of flaxseed oil.
Always let your doctor know about any supplements or medications you take.