Taking Olive oils is great, I do reccomend it, it is part of my Longevity PM formula and all I make can be used during the fast in my opinion. Medically though, you need to do it to the book if you want the effects in 14 days.
There is no need to worry about vitamins and minerals. The orange juice will give you all you need and more so.
People have to learn that they have 900 times too much calcium, and all those synthetic vitamins they buy cloggs their veins. The reason a fast works is that it allows the body to clean out these things people have been mislead into buying as health supplements.
Anyone attempting the orange juice fast should read a medical written book that used this method 63,000+ times.