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Cold Press vs Centrifugal: Lab Tests Challenge Popular Juicing Myths

In a world increasingly captivated by health and wellness trends, cold press juicers have been touted as the superior choice over centrifugal juicer and citrus presses for those seeking to maximize their vitamin intake. This claim, frequently echoed by industry players, has gained significant traction amidst the popular detox diets that heavily incorporate juice consumption.

A recent laboratory analysis, however, offers a fresh perspective on this debate, challenging some of the key assertions made by extractor manufacturers. This article dives into the findings of this comprehensive study.

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1. Vitamins and Antioxidants – No Significant Difference

The central argument for cold press juicers has been their supposed ability to better preserve vitamins and antioxidants in fruits and vegetables, as compared to centrifugal juicer. The study tested 9 cold press juicers and 4 centrifugal juicer, measuring the temperature of the juice produced and comparing it to the temperature of the fruits before pressing. Surprisingly, the temperature differences were similar across both device types, with no significant impact on nutrient content.

Notably, the highest temperature increase recorded (+3°C) was from a juicer, the H.Koenig GSX12. Further analysis of vitamin and antioxidant content in 200 ml of juice made from the same fruit batches across 13 devices, including 3 blenders and 3 citrus presses, revealed equivalent nutrient levels regardless of the machine used.

This finding casts doubt on the marketing claims often made by extractor vendors.

2. Fiber Content – Largely Absent

Both juicer and centrifugal juicer largely retain pulp and fibers of fruits and vegetables, which is convenient for those preferring pulp-free juice, but it results in the loss of valuable nutrients. The study showed that fiber content in orange, apple, and carrot juices made by extractors was less than 0.5 g/100 g, covering less than 2% of the daily recommended fiber intake for an adult in a 200 ml glass.

This is a significant shortfall, considering that modern diets are already deficient in fiber, according to nutrition researcher Professor Nathalie Delzenne from Brussels. Health authorities recommend consuming fruits, vegetables, and whole grains to meet the daily fiber requirement of 25-35 grams.

3. Juice Cleanses – High in Sugar

The popularity of detox juice cleanses often overshadows their unbalanced nature. While fruits and vegetables are low in proteins and fats, they are high in natural sugars, especially when stripped of their fiber in juice form.

This can lead to rapid sugar assimilation and spikes in blood sugar levels. Dr. Laurence Plumey, a nutritionist, suggests opting for vegetable-based juices with a fruit addition for a healthier alternative. However, remember that even homemade fruit juice can only contribute to one of the five recommended daily portions of fruits or vegetables.

3. Consumption Recommendations

The study examined the nutritional content of orange, carrot, and apple juices made with various devices, including extractors, centrifugal juicer and commercial products. For oranges, homemade juices had higher vitamin C content than store-bought versions, covering over 100% of the daily recommended intake. Carrot juices from extractors showed a slight advantage in vitamin B9 content over centrifugal juicer.

Whole fruits provided more fiber and less sugar than their juiced counterparts. The study also found that commercial apple juices and whole apples had higher antioxidant powers than juices made with extractors or centrifugal juicer.

Conclusion

The study’s findings challenge the widely-held belief that cold press juicers are inherently superior to centrifugal juicers and other juicing methods. While extractors may offer marginal benefits in some nutrient aspects, the differences are not as pronounced as marketing claims suggest.

The analysis underscores the importance of a balanced diet that includes whole fruits and vegetables, which offer more comprehensive nutritional benefits than juice alone. As the wellness industry continues to evolve, it’s crucial for consumers to remain informed and critical of health claims, especially when they are rooted in commercial interests.

Source

Extracteur de jus VS centrifugeuse: Nos analyses en laboratoire” – A comprehensive laboratory analysis comparing cold press juicers and centrifugal juicers in terms of nutrient preservation and overall health benefits.

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