since 4 LF's (Idid 15 so far) I use only lemon juice and have the impression, this way flushing works by far better than using grapefruit juice. I cannot agree with hopsino who said, lemon juice will not blend with the oil. Shaking the oil/lemon juice mixture for a while make the drink quite palatable. However, be aware it is very sour.
Issue Candida. I was the candida queen before flushing. Now I am candida free. So, there is something you can look forward too after having flushed many times.