Not so good for us if you are talking about vegetable shortening. I haven't heard that term as over hear we call it vegetabe oils. The most common is margarine and canola oil.
An anecdote for you if you want to bear with me.
In his 20s my stepfather was walking along the street when he lost his sight in one eye.
He was near the Hospital so he went in, where the Doctors stood around oohing and aaahing and doing nothing.
A young guy walked in and said "For God's Sake get him into surgery or he will be blind for life. "
The retina had fallen off the back of his eye.
The Doctor reattached it and he was told that if he was extremely lucky it might last him 20 years; however if it came off again, that would be it and it couldn't be reattached again.
Fast forward 40 years and his sight starts going again. Because of what he had been told he didn't do anything about it.
Mum tracked down the same Doctor and he is now the best eye Doctor in Australia and it turned out that this time it was only a cataract and could be fixed.
There was a lady crying in the waiting room, so Mum went over to find out why.
She said she had just been told that she is going blind and there is nothing that can be done to stop it. Mum assured her that she was at the best Doctor and he would be able to help.
Chris was called in and Mum went in with him. She said to the Doctor that he should go outside and see the lady out there as someone had told her she was going blind and that he wouldn't be able to help her.
He shook his head sadly and said that unfortunately it was true. It is called Macula Degeneration and after it has gone so far it was unstoppable.
He went on to say that they never saw it. Then they saw a case here and there. Now they see it all the time, so a lot of research has been put in to find out why.
....and they had finally found an answer. The culprit is vegetable oil, especially margarine and especially canola oil.
Olive oil on the other hand is different and okay.
So we can have butter and get heart disease or eat margarine and go blind.
Or don't have either, which really isn't that hard once you make the decision.