"Effect of cold-pressed and normal centrifugal juicing on quality attributes of fresh juices: do cold-pressed juices harbor a superior nutritional quality and antioxidant capacity?". ^ a b c d e f Khaksar, Gholamreza Assatarakul, Kitipong Sirikantaramas, Supaart (2019).^ a b c d e Latif, Ray (12 September 2013)."Cold-pressed juice, hot in L.A." Los Angeles Times. ^ a b c d e f Hallock, Betty (15 June 2013).^ a b c Gordinier, Jeff (16 April 2013).^ a b c d e f g "Why Your Cold-Pressed Juice Is So Expensive"."Cold-Pressed Juice: Is it Worth the Hype?". Nutritional labeling requirements must be followed in some regions, including the US, where the nutrition facts label must state nutritional content, ingredients and the manufacturer. The manufacturer must keep log books available for health inspectors if requested. In a HACCP plan, the manufacturer must identify at which points in the manufacturing process the juice may become contaminated, and how to regularly test and confirm that the juice is not being contaminated. Juice manufacturers may also have to organize an approved HACCP (Hazard Analysis and Critical Control Points) plan. There are several processes available that can achieve a 5- log reduction, including heat pasteurization and ultraviolet light filtering, but the most common process in the cold-pressed juice industry is HPP. To sell juice wholesale, the juice must undergo a process that achieves a "5 log reduction in bacterial plate count." The process must reduce the amount of microorganisms by 100,000 times. In the United States, the US Food and Drug Administration prohibits wholesale distribution of raw juice, stating that it may only be sold directly to consumers. There are laws and regulations governing the production and distribution of raw juice that vary widely by region. Alternatively, the incremental cost of tool processing could range from US$0.25–US$0.45 per bottle, not including transport. The high cost has been attributed to the manufacturing process which uses an HPP machine that may cost from US$800,000 to over US$2 million. High cost Ĭold-pressed juices could cost US$10 for a 16 ounce (473ml) bottle, and as high as US$12 for a 12 ounce (355ml) bottle. Cold-pressed juices showed degradation of constituents within 6 days of normal cold storage in a refrigerator. Color and physicochemical composition, including polyphenols, carotenoids, and vitamin C were not different among juices of various tropical fruits prepared using a cold-press instrument, a centrifugal juicer or a blender. Nutrient preservation Ĭold-pressing does not preserve the contents of phytochemicals or micronutrients compared to conventional centrifugal juicing or blending. Though the size of the cold-pressed juice industry is not independently tracked, the 2013 estimates ranged from US$1.6 billion to US$3.4 billion. Starting with Liquiteria in 1996, cold-pressed juice bars first emerged in New York City and have since spread internationally. Without pasteurization, as for typical home-made juices stored in a refrigerator, significant degradation of phytochemicals and micronutrients occurs within 6 days. Pasteurization or HPP allows the juice to be stored for about 30 days. Īfter extracting juice from fruits and vegetables, the juice may be consumed raw, or the manufacturer may choose to put the juice through a preservation method such as HPP or pasteurization to extend shelf life and kill potentially harmful microorganisms. Vertical press layers with open-top cloth bags allow for faster loading and emptying of the press, compared to the classic rack-and-cloth method which involved wrapping layers of ground fruit in cloth. The industry standard hydraulic cold-press technology with vertical pressing layers was invented by Dale E. The pomace left behind is generally composted, recycled in food products or discarded. The pressure causes the juice and water content from the produce to drip into a collection tray below, leaving behind the fibre content in the filter bag. The second process is the hydraulic press this exposes the shredded produce to extreme pressures between two plates. Produce is loaded into a large hopper feeding tube and typically falls into a filter bag. In industrial production, the shredding process uses a steel rotating disc. The first stage is to shred or compress the fruits or vegetables into a pulp. Making cold-pressed juice is a two-step process. Although cold-pressed juices were produced over several decades, the products gained more common use during the fad of juice "cleansing", expanding into a wider industry in the early 21st century.
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