I have a juicer and I use it everyday. My first juice of the day is made out of:
6 kales leaves
1/2 lb. spinach leaves
1/2 cucumber
1/2 lemon
thumb size peeled ginger root
4 stalks of celery with our without leaves
2 large apples of your choice
Note: this makes a lot of juice, two days worth or about 32 ounces give or take.
Later in the day I have juice 3 or 4 oranges and then I put the fresh orange juice in my blender with a frozen banana that I keep alot of in my freezer and have a orange/banana smoothie.