All in the name of saving them some money...
I do most of my own baking and stay clear of certain ingredients. Fully/Partially-hydrogenated oils being something that I personally avoid.
For instance, there are many peanut butters that have 0-trans fat; advertise it on the front!! But if you read the ingredients, they contain fully-hydrogenated oil (palm oil). I buy the store brand with the oil floating on top, pour out a little bit, stir and refrigerate. My children LOVE it (except the one with PB allergy!... that's another thread!)!!!
I use real butter and/or olive or canola oil in my baking.
The closer to nature, the better. It is hard to shop in this day and age....so much safer and heart-healthy to do it yourself!
Of course, all of this could be proven *wrong* in another 5 years or so!!!... FIL has eaten whatever! for 86 years and has the healthiest heart! Go figure.