Tracey
Hiya! I'm in Canada too and have just gone without the ornithine. Most times it seems to be allright. So, you're coming up to your first flush? How exciting! I always use extra virgin cold pressed olive oil, just because you may as well put the best stuff inside you! (haven't quite splurged on the organic part just yet, though!) Some people use 'light' because it has less flavour than the extra virgin...
Also...my tip to you would be to buy PINK Grapefruits and squeeze 'em fresh. They really are yummier than the white ones..and when mixed with the olive oil (shook up) the whole mix emulsifies and isn't 'oily' at all. Some even find it quite tasty! (I'm one of them)
Let us know how your first one goes!
Tracey