When I purchased my shortening, I almost grabbed Crisco but then opted for the even-cheaper "Shoppers Value" brand pre-creamed shortening. I assumed shortening was only made from vegetables and clicked vegetable shortening when figuring my lye with the calculators. I now see that this particular shortening is prepared from meat fats and vegetable oils with mono and diglicerides, bha and bht added to help protect flavor. Does this make a difference to the lye calculators? I would think so, but I'm not seeing an option to click on shortening made with animal fats and vegetables combined...