2 Stalks of Celery
1 Clove of Garlic
I almost always buy organic produce, but surely there are times of the year where certain fruits or veggies aren't available. In that case, I make sure to wash these items a bit extra (regardless of organic or not, I'd always recommend washing your produce).
Always drink your juice as quick as you can after juicing, as the enzymes and nutrients lose their power quickly.