I have been using a lot of garlic (upwards of 4-6 cloves) in my juices lately and peeling garlic has been such chore.
Until I purchased peeled garlic and it's such a lifesaver. I just open the container and pop the cloves into the juicer. Easy.
I would recommend purchasing your peeled garlic at an Asian market compared to a chain grocer. Not only is Asian market's garlic fresh with no preservatives but it's super inexpensive. Keep in the refrigerator and it will last a good while.