Getting omega 3's from flaxseed oil..
Q. Omega 3 from Flaxseed: A very small percentage of ALA converts to EPA and DHA. Studies show sometimes as little as 7%. BUT consider this: 1 tbsp (14,000 mg) of flaxseed oil yields 7,700mg of ALA. 7% of 7,700 = 539mg of EPA and 385mg of DHA. A dose of fish oil yields 360mg of EPA and 240mg of DHA. Studies also show that in a healthy person as much as 15-20% converts to EPA and DHA.
Dr. Rosedale's response. People who need it the most need more than that to make up in a deficiency and are least able to convert ALA from flaxseed oil. They would need 2 tablespoons daily and even then those with insulin resistance (the vast majority of people in the world) would be very inefficient at converting it due to lack of magnesium and other factors. Furthermore 2 table spoons of flaxseed oil has approximately 240 calories which is significant overtime (I do not care so much about calories, but eating more when you are not hungry, ie forcing the flaxseed in order to get the omega 3's). Yes, if one is healthy omega 3's can be maintained using flaxseed for others fish oil or algae derived omega 3 is better. Hope this helps.