I would say YES. I see it in mine from Barlean's with highest lignan content coming out of bottle when I shake it. Dark brown even black sludge. It must be lignan content as I never saw it before with previous types of flax oil. So, CHEERS AND SHAKE IT!
Why do you keep it in freezer? Have no place in refrigerator hehe? Best kept is refrigerated and you can use it at least 6 month from the day it was pressed.