Cold-Pressed VS Centrifugal Juice – Part 2: Nutrient Shelf Life

Cold Pressed Juice vs Centrifugal Juice Nutritional Data

Cold-Pressed VS Centrifugal Juice – Part 2: Nutrient Shelf Life

Experiment planned and executed by Ari Sexner, juice business consultant. 

You can download the full lab report here.

Introduction

In the first part of this series, Cold-Pressed VS Centrifugal – Part 1: Real Nutritional Data, we tested the nutrient content of juice made on both a centrifuge and a cold-press and found that the cold-pressed juice contained about 15% higher nutrient content.

For Part 2, we have created a green juice recipe on both types of machines, and tested nutrients every day for 3 days to compare how they deteriorate over time.

Recipe

For this test, we made a green juice blend consisting of:

  • Cucumber
  • Green Apple
  • Kale
  • Spinach
  • Lemon
  • Ginger

Nutrients:

We had the lab test for Vitamin A, Vitamin C, and Iron. Iron did not show up in either of the samples, so we excluded it from the rest of this article.

Equipment

For the juice equipment, we used:

Cold-Press – Goodnature Countertop CT7 with Sammic CKE-8 for grinding
Centrifugal – Nutrifaster N450

Testing

We made the juice and bottled it, packed in cold packs to keep it at 45 degrees, and overnighted it to the lab. There were 3 samples of each type of juice, so that the lab could test one sample each day, without disturbing the other samples that are kept at 41 degrees.

Day 1

On day one, this sample shows almost identical amounts of Vitamin A, but much higher Vitamin C in the cold press sample.

Cold Pressed vs Centrifugal Juice Lab Results Day One
Cold Pressed vs Centrifugal Juice Lab Results Day One

Day 2

At 48 hours we see, surprisingly, about a 3% rise in the Vitamin A in cold-pressed, and a 35% decrease in the centrifugal.

Vitamin C stayed in the same in the cold-pressed, and dropped 20% in the centrifugal.

Cold Pressed vs Centrifugal Juice Lab Results Day Two
Cold Pressed vs Centrifugal Juice Lab Results Day Two

Day 3

At 72 hours Vitamin A dropped off by about 12% in the cold-pressed juice, and 46% in the centrifugal sample.

Vitamin C remained the same in both samples.

Cold Pressed vs Centrifugal Juice Lab Results Day Three
Cold Pressed vs Centrifugal Juice Lab Results Day Three

Results Table and Charts:

cold-pressed vs centrifugal shelf life chart
Cold Pressed vs Centrifugal Juice Shelf Life - Vitamin A
Cold Pressed vs Centrifugal Shelf Life - Vitamin C

 

 

Conclusion

These lab tests show that this sample of cold-pressed juice did indeed hold up better over time compared to the centrifugal sample. We believe this is due to the following reasons:

  1. Centrifugal juice is highly oxidized due to the method of extraction.
  2. Centrifugal juice contains more solids / pulp and therefore breaks down faster than juice made on a press.

Download Data

Cold-pressed-vs-centrifuge-shelf-life-test PDF

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Sobre el autor

Instagram: @cwjuice
YouTube: ColdPressedTruth

President and CMO - Goodnature
Co-founder - JuiceCon
Co-founder - Juice Makers Association

I’ve been around juicing all my life. My Dad built his first hydraulic juice press in 1976 and founded the company Goodnature Products, Inc. I have incredible memories of having “cider parties” when we would invite all the people in our rural neighborhood over to make apple juice. To this day, when I taste apple juice made on a Goodnature press, a rush of nostalgia runs through my body.

I pride myself on guiding our clients into the world of cold-pressed juice and showing them how much fun this industry can be. I love talking business, technology, and marketing.

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