Juicing for Health and Nutrition

How does juicing fit into a healthy diet?

Monica Reinagel, M.S.,L.D./N
5-minute read
Episode #47

Whole Juice Versus Extracted Juice

And that’s where “whole juicers” come into the picture. Instead of extracting the water, sugar, and most of the nutrients from fruits and vegetables and leaving all the fiber and pulp behind, whole juicers are more like blenders that liquefy entire fruits and vegetables. Whole juice will still cause a more rapid rise in blood sugar than eating the same amount of unpulverized produce, but not as rapid a rise as drinking extracted juice.

With whole juicers, you get all the benefits of the juice, plus all the fiber and any nutrients that would otherwise remain in the pulp. Many people see this as the best of both worlds--a way to pump up their diets with some extra plant nutrition and still get the benefit of the fiber.

Here’s what the whole juicer people don’t tell you, though: Pulverized fruits and vegetables are too thick and pulpy to drink. And diluting them with water makes them flavorless. You need to add some sort of extracted juice (either fresh or bottled) to make them drinkable.

With Juice, Time Is Your Enemy

Whichever kind of juicer you choose (I have to admit, I have one of each), the juice will only be as nutritious as the fruits and vegetables you start with, so you want to be juicing fresh, seasonal produce. It’s also important to drink your concoctions as soon after they are made as possible. The antioxidants and other phytonutrients start to break down almost immediately once they are exposed to light and air.

For example, no matter how healthy the ingredients sound, those expensive bottles of juice from the health food store will have lost a lot of their nutrition by the time you drink them. If it’s peak nutritional value you’re after, you’re better off stopping at a juice bar or making your own.

Juicers--both the extraction kind and the whole food blender-type—will set you back a few hundred dollars; and making either type of juice can be a messy and time-consuming process. Rachelle wonders whether making a larger batch of juice and freezing some of it in small bottles would be a good way to save time and preserve the nutrient content of the fresh juice.

I think Rachelle is onto something. As you might remember from my show on how cooking affects nutrients, freezing is pretty easy on nutrients. Some of the nutrients will still be lost, but freezing fresh juice and drinking it within a few days is probably the best way to preserve most of the nutrients but cut down on the mess and hassle of making juice every day.

Juice as Part of a Healthy Diet

Here are some final thoughts on incorporating fresh juice into your diet:

  • If you’re drinking juice as a meal or snack, whole juice will probably help keep your blood sugar levels steadier and keep you from being hungry an hour later. 

  • If you’re adding juice to your normal diet, keep in mind that it can contain a substantial amount of sugar and calories so you want to be sure you’ve accounted for that.

  • Consuming nothing but juice—no matter how many nutrients it contains—is not a balanced diet because it provides no fat and no protein. If you’re otherwise healthy, it’s fine to consume nothing but fruit and vegetable juice for a day, but any sort of extended fasting--including juice fasting--should only be done with the guidance of a doctor or nutritionist.

Fresh juice can add a lot of high-quality nutrition to your diet. But I still think it’s ideal to get at least half your fruits and vegetables in a form that you have to chew. You’ll find research references as well as links to more information on juicing and various types of juicers in the show notes.  And for a look at how canned vegetable juice stacks up to fresh juice, head over to this Quick Tip.

Lastly, for a Quick Tip on getting your fruits and vegetables clean of soil, bacteria, and pesticides in a cheap and effective way, head on over here.


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Have a great day and eat something good for me!


Research comparing nutrient absorption from vegetables versus vegetable juice. (from Cancer Epidemiology, Biomarkers, and Prevention)

A skeptical look at benefits of juicing by Steve Barrett, M.D. (from Quackwatch.org)

Juicer Comparison Chart

Juice image courtesy of Shutterstock


About the Author

Monica Reinagel, M.S.,L.D./N