whats difference between mollasses?

[cwesto]

in my grocery store, they sell both blackstrap and fancy mollasas. i chose fancy because the nutrition label seemed to indicate more iron, vitamins, carbs, etc. is that a good choice?

I would imagine that is a good kinds, since im pretty sure molasses is used as a carb supplement. I may be wrong about the molasses being a carb supplement tho, i have never used it.. I also heard that blackstrap mollases or whatever it is, is fine for horticulture.