Long time lard and tallow renderer chiming in here.... Yes, to glean the vitamin d benefits, the lard must come from pastured piggies. If possible, head to your local farmers market and cultivate a relationship with a local pig farmer. Buy or barter the fat from his freshly slaughtered pigs. Do the same with a local beef rancher if you want tallow (and you totally want tallow). Particularly the leaf fat, as it lends itself to a multitude of applications beyond consumption. Here follows a comparatively quick and easy recipe to render animal fats into lards or tallows, respectively: Necessary tools: -A good sharp knife or two -Cutting board -Meat Grinder -Instapot -Pyrex Measuring cup (4 cup) -Fine mesh wire strainer -Wide mouth 1/2 pint ball jars Procedure: -Take your slightly frozen fat and cut it into meat grinder serviceable sized chunks. Trim as much of the meat away as possible. *Note: Fat will quickly dull a blade, so have a couple on hand or sharpen frequently as you go. **Note note: fat makes everything it comes in contact with slippery. Exercise an overabundance of caution while cutting. -Feed the Fat into the meat grinder -Put the ground fat into the Instapot (no lid) and use the saute setting, stirring occasionally to keep the fat from sticking to the bottom. -In manageable batches CAREFULLY strain the liquid fat through a wire mesh strainer into a 4 Cup Pyrex Measuring cup -Pour the liquid fat into Ball Jars, cover with a cloth to cool. -Once cooled, lid them and store them. - If you so desire, you can salt and continue to fry the remaining fat in a good cast iron skillet for some legit cracklins. Results: https://pic8.co/sh/kL70lf.jpg