There is a difference between eating healthy, enjoying life and being healthy - and going overboard.

I would say this: if you are going to cut all added oil and fast out of your diet I would hope you are seeing a Doctor in person, preferably a heart specialist if you have heart issues. And not basing it on simply what is in a book. It isn't something to mess with! You need a balanced diet that will provide nutrients, protein and everything your body needs. Fat is something we DO need to survive. Just not in the portions of say a double cheeseburger and a large fry order. A dinner made with a Tablespoon of first press EVOO is not only tasty, it is good for you. Moderation is of course the key!

You go to low with fat you WILL have issues! It is a good way to have unhealthy skin, loss of hair and other issues crop up. Just thinking of my Aunt who was borderline anorexic who starved herself and also only ate around 10 grams of fat a day - brrrr. Those are some bad memories. I starved myself as well when I was college aged, it was neither pretty nor good for me. Frankly, there is a difference between being in shape and at a reasonable weight than just being skinny.
http://www.dietbites.com/article1097.html

As for my comment on being regular....sure, whole grains/vegetables and legumes have plenty of fiber - but fiber alone is not always enough.

As well, certain vegetables their nutrients are taken in better by the body with a tiny amount of oil added.

I don't buy the no oil added unless, and only unless, you are under direct orders by a doctor specializing in it.