When juicing at home, make only as much as you can consume at one time. Juice that sits for a period of time can harbor bacteria and cause food poisoning. What's more, exposing the drink to air, bacteria and other pathogens can not only make you sick but threaten the nutritional value of the juice.
E. coli is a very dangerous bacteria that can live on your fruit and vegetables and make you sick. The problem is that it can only be killed with heat, which has the side effect of damaging the nutritional content of the juice. Always wash produce thoroughly to remove any dirt, pesticides or bacteria, and make sure your cutting board and utensils are clean. (You could also boil your juice on the stove).
If you decide to pursue a diet that consists predominantly of juice (i.e., you want to try a juice cleanse) aim for at least 2000 calories (or more) per day, depending on your metabolic needs. It's key for your health that your body receives a sufficient amount of calories, vitamins, nutrients, protein, fat and carbohydrates. Also, make sure you're getting enough fiber to keep your digestive system working smoothly. You can add dissolvable fiber powder to your juices or supplement with fiber-rich solid foods like prunes or pears.
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