What is cold-pressed juice? HPP and organic explained simply

Cold-pressed juice is pressed without heating. Fruit and vegetables are first chopped up, then slowly squeezed under high pressure instead of being spun in a fast centrifuge. This generates very little heat and limits contact with oxygen. Both help protect sensitive nutrients such as vitamin C.

Whether a juice is really good, however, isn't decided by the pressing method alone. How it's preserved, where the ingredients come from, and how much vegetable it contains are just as important. A cold-pressed juice made entirely from apples is still a source of sugar, however gently it was pressed.

We'll go through these four points one by one so you can tell from the label what you're paying for. Our article does a juice cleanse really do anything explains whether juice like this can actually help as part of a cleanse.

Most juicers for home use contain a centrifuge. A grating disc chops the fruit at high speed, and centrifugal force spins the juice through a sieve. It's fast, but has two side effects. Friction generates heat, and the spinning whips air into the juice, visible as foam in the glass.

Cold pressing happens in two steps. First, the ingredients are ground into a fine pulp, then a hydraulic press slowly squeezes the juice out of the pulp. Nothing spins, nothing gets warm, and the juice has far less contact with oxygen.

An apple cut in half shows just how much heat and air matter. After a few minutes, the cut surface turns brown - that's oxidation. The same reaction happens in juice, only faster when it's warm and full of air bubbles. That's why cold-pressed juice keeps its color longer and tastes fresher. Try the same celery and cucumber juice, once from a centrifuge and once from a press, and you'll notice the difference with the second sip.

Freshly squeezed juice spoils quickly. Most manufacturers address this by pasteurizing it, which means briefly heating it. This extends shelf life to months, but at the cost of exactly the compounds that make juice valuable. A 2026 review summarizes the research as showing that heat treatment costs an average of 50 to 70 percent of the naturally occurring vitamin C. Non-thermal methods, by contrast, often preserve more than 90 percent of it.

The HPP method, short for High Pressure Processing, is one such method. The juice, already in its bottle, is placed in a water tank and subjected to very high pressure, usually 400 to 600 megapascals, or around 4,000 to 6,000 bar. This high pressure neutralizes microbes without warming the juice. A 2020 lab study tested this on a fruit juice. At 400 megapascals and above, the juice remained microbiologically safe for 28 days under refrigeration and contained significantly more antioxidants than the heat-treated comparison sample. This is a single study, but its findings are consistent with the review.

That doesn’t tell you what it means for your body; juice isn’t medicine. Technically, it only means that more of the ingredient makes it into your glass. The trade-off is the cold chain: HPP juice lasts for weeks rather than months, so it’s kept in the refrigerated section.

Organic isn’t just a feel-good label for juice; it’s a difference measured every year by official food inspectors. For the 2024 reporting year, the Federal Office of Consumer Protection and Food Safety tested a total of 16,423 food samples for pesticide residues. No quantifiable residues were found in 80.1 percent of samples from organic farming, compared with 45.9 percent of conventionally produced samples. Residue levels were also lower in organic fruit and vegetables (Federal Office, published 2026).

That doesn’t mean conventional produce is dangerous; the legal maximum levels apply to all produce. It means organic produce is less frequently and less heavily contaminated. This matters more with juice than with a single apple, because a lot of fruit and vegetables go into one bottle, often with the skin on, and whatever is on them from many fruits ends up in the glass.

Depending on the recipe, half a liter of green juice takes a cucumber, several stalks of celery and a handful of kale. Anyone who buys that much organic vegetables understands why a bottle of organic cold-pressed juice doesn’t cost two euros.

Cold-pressed juice is a gentle way to drink fruit and vegetables. It’s no substitute for eating them. When juice is pressed, the insoluble fiber stays in the pulp—that’s the part that keeps you full and nourishes your gut bacteria. A small 2025 study of 14 participants observed shifts in the oral microbiome after three days of consuming juice exclusively, which the researchers attributed to high levels of free sugars and a lack of fiber. With 14 participants, this is a signal, not a definitive finding, but a good reason to see juice as a break, not a long-term solution.

Then there’s the sugar. The World Health Organization (WHO) explicitly counts the sugar in fruit juice as free sugars, which should make up less than ten percent of your daily energy intake. Cold-pressing doesn’t change that. Apple and orange juice contains just as much fruit sugar whether it’s spun or pressed. What makes the difference is the proportion of vegetables. Find out how much sugar and how many calories are really in a cleanse in our article on calories and sugar in a juice cleanse.

That last point is the expectation. Cold-pressed describes how it’s made, not what it does. Your body has a liver and kidneys to process metabolic waste; a juice doesn’t take over that job.

Use all four points together, and you’ll have a quick checklist for every bottle.

• cold-pressed, meaning pressed without heat
• not pasteurized, but preserved using high pressure, as indicated by the refrigerated section
• ingredient list with vegetables first, since it is ordered by quantity
• organic certification, because residues from many fruits can accumulate in juice
• no additives, no added sugar, no concentrates

The ingredient list tells you the most. If apple or grape comes first, you’re holding a sweet fruit juice, even if the front shows a kale leaf. If cucumber, celery, or spinach comes first, the juice is vegetable-forward. The nutrition facts show the sugar per 100 milliliters.

DALUMA juice cleanses are made according to these criteria. Each juice contains up to eleven organic ingredients, is cold-pressed, not pasteurized, and free of preservatives. For an overview of all the cleanses, see our juice cleanses. Our comparison of green or classic juice cleanses can help you decide which option is right for you.

Cold-pressed juice is more than just a word on the label. Slow pressing without heat and preservation using high pressure instead of heat mean that most of the vitamin C and other sensitive ingredients stay in the bottle.

Ultimately, it’s the overall picture that counts. A truly good juice is cold-pressed, preserved using HPP, organic, and high in vegetable content to keep sugar low. It doesn’t replace vegetables on your plate or the work of your liver and kidneys. If you keep these things in mind, you’re paying for the goodness of fresh ingredients, not colored sugar water.