HMR Lignans come from the Norwegian spruce tree and are chemically extracted from the pine knots of the Spruce tree. The flaxseed lignans are an SDG lignan and they are mechanically separated from the flaxseed hull. Flaxseed lignans contain fiber and HMR lignans do not. Both HMR lignans and flaxseed lignans have the same effect in the body; they are both converted to enterodiol and enterolactone in the body. They are both phytoestrogens that possess hormone balancing properties and studies have shown they both work equally well.