oh yes that's an option we've discussed a lot here. The Cleansing Carrot Salad works on that principle, and several CureZone users swear by it. :)
For the small dose of lemon juice/oo each morning to really work, you have to be comprehensive: a liver-supporting/cleansing diet combined with herbs. That way as the herbs/other compounds do their work, the oil and lemon juice then help the liver get rid of the things that the herbs have broken down. So be sure to do all three things for at least a week. It also helps to stretch out, as that massages the liver. Castor oil packs are also very helpful.