Is it worth spending the extra money for cold-pressed juices? But it’s one that does preserve more of what we find advantageous within plenty of fruits and vegetables.

Hydraulic mastication of vegetables is a slower, less efficient process. They just aren’t pumping air into newly liquid juice. It’s also the reason that foods carry sell-by dates on them.Ĭold-pressed juicer - Photo courtesy of E+ / vgajic Why isn’t it just called non-oxidized juice then?Ĭold-press juicers still expose juice to air. Oxidation is the reason we store leftovers in plastic containers and refrigerate foods that would otherwise spoil.

Vitamins B and C, as well as antioxidizing phenolic compounds, are particularly sensitive to degradation when forced into contact with air. On a more visible, if drawn-out scale, food begins to spoil.Ĭentrifugal pressers kickstart the oxidation process by exposing newly liquid juice to air as it is forced through spinning blades. On a miniature scale, nutrients begin breaking down. As soon as the inner flesh of fruits and vegetables is exposed to the surrounding air, degradation begins to occur. Unlike the complicated relationship between heat and raw plant-based foods, oxidation is most assuredly not good. But remember, heat isn’t the only thing cold-pressing is meant to protect produce from. The science on the benefits of cold-pressing is decidedly mixed, with the effects of heat varying dramatically on crop to crop. Sure, those veggies aren’t exactly popular components of green juices, but smoothie staple spinach is also on the list. Mushrooms, asparagus, cabbage and peppers all join carrots on the list of vegetables that release higher levels of nutrients like antioxidants, carotenoids and ferulic acid when exposed to heat via steam or boiling water. Wait, so is heat good or bad?įrankly, it’s complicated. Cooking potatoes is required before human consumption, unless you want to make yourself sick. And then there’s the matter of chemicals such as solanine and chaconine, naturally present in raw vegetables like potatoes, for example. Heat is even necessary for human consumption of plenty of vegetables – and certainly animal proteins.Ĭertain uncooked vegetables are downright indigestible within the human body due to their naturally hearty cellulose fiber. On the other hand, cooking carrots actually results in increased levels of beta carotene. Cooked broccoli, for example, is less nutritionally dense than the same amount of raw broccoli. Heat can destroy certain enzymes and nutrients, such as notoriously delicate vitamin C. More of the initial product makes it into the final juice through this process, but it is exposed to potentially degrading heat and air along the way.Ĭentrifugal juicer - Photo courtesy of E+ / Liliboas What’s the problem with heat? The blades generate a bit of heat as they spin, while also forcing the juice into contact with air, beginning the process of oxidation. What they are actually doing is using a rapidly spinning set of blades – usually powered by electricity – to pulverize produce as it is forced through a machine. Centrifugal juicers aren’t outright boiling or steaming the juice out of fruits and veggies. Centrifugal juicers are what we’re talking about when it comes to hot-pressed juicers, and the name is a bit of a misnomer. There are! But they go by a different name. Though, in theory, the juice created is richer in nutritional content. Cold-pressing takes longer and produces less juice.

Machines and tools built to aid in cold-press juicing are also called masticating juicers, because they use hydraulic power to effectively chew and crush the juice out of otherwise fibrous plants. This is going to shock you to learn, but cold-pressing is the process of separating the fiber from the cells of fruits and vegetables – you know, juicing – without the aid of any heat. Take, for example, cold-pressed: What does it mean? Does it matter? And are cold-pressed juices any better for you than the alternative? So.what does cold-pressed really mean? When it comes to fruits and vegetables, some of those identifiers really do matter in a big way. For those of you living the shade-grown, organic, fair-trade, made-with-natural-flavor life, it can be tricky to suss out which of those labels are actually regulated terms, and which are just a buzzword salad.

Pressed juice