Butter is not made from skim milk. It is made from the milkfat (cream) that rises to the top of the milk before homogenization. I always recommend organic butter, mainly due to the fact that toxins are more concentrated in the fat of animals, therefore if a cow is not fed organic feed, the toxins in the feed it gets will end up in it's fat thereby rendering the milkfat more toxic!
The term "skim" milk means that there is no fat in the milk. All of the fat has been skimmed off. For this reason, if you us dairy products from conventionally fed cows, then I recommend using only skim (fat free) so you don't get as many toxins. If you use organic dairy products, there is less exposure to toxins in the milkfat, so it is safer to use organic dairy products that do contain some fat.
The Spectrum coconut oil that is refined vs. unrefined is really OK to use. Coconut oil, as long as it is not hydrogentated, is a great oil. All coconut oil can be heated to about 350 degrees on stovetop and 400 degrees in the oven if used in a recipe that has some other moisture in it, like a muffin, pie, or bread.
Coconut oil is extremely stable. It will melt at 78 degrees and turn to a clear liquid. Putting it in the refrigerator will not harm it at all, it will just harden again. You can do this over and over and it won't affect the oil. However, it is not necessary to refrigerate the oil since it is extremely stable, and it you leave it in your cupboard it will probably stay in the liquid form which makes it easier to use!
Sea salt contains all of the minerals from the sea, especially iodine.