Barbara asked for more info about blackstrap molasses yesterday. Here's a quote from Wikipedia.
Blackstrap molasses is the dark liquid byproduct of the process of refining sugar cane into table sugar. It is made from the third boiling of the sugar syrup and is the concentrated byproduct left over after the majority of sucrose has been crystallized. Blackstrap molasses is mostly sugar by calories, but unlike refined sugars, it contains significant amounts vitamins and minerals. Blackstrap molasses is a source of calcium, magnesium, and iron. One tablespoon provides up to 20 percent of the daily value of each of those nutrients..
As I mentioned to Barbara, I like using blackstrap molasses because of the calcium and iron. For the entire article on molasses click here