The site iw www.egregore.com. I clicked on 'Herbs' from the menu, then 'F' from the alphabetical list, sselected Flax Seed, 'Warnings', and read the 'Caution' note. It says that 'large quantities' cause problems, but did not state what a 'large quantity' is. However, the site listed 1 to 2 tablespoons as a normal dose, so is 1/4 cup a 'large quantity'? I wish they were more specific.