Science proves that juicing has powerful health benefits, but we're oranges to make one modest cup (eight ounces) of orange juice, and. Do you find yourself struggling to get the daily recommended allowance of fruits and vegetables in your diet? I stress drinking juices and smoothies with little or no added fruit, because fruit increases the sugar and calorie count of your juice. Let's take a closer look at some of the leafy greens I put in my healthy juice. Here's how to ensure you're making a healthy, low sugar green juice. with your fruit, go for low-glycemic fruits like green apples and berries.