The Samson Ultra juicer contains magnets - which the supplier states "helps preserve essential enzymes, nutrients and flavor for up to 72 hours".
The most popular twin gear juicers now all contain magnets and ceramic technology - the latter is intended to translate the magnetic field into electromagnetic radiation.
To give some idea of the nature of the claims I've assembled some comments relating to it.
Green Power is the first and only juice extractor in the world to employ powerful magnets to help create maximum nutritional quality. With this breakthrough technology, Green Power has achieved results no other juicer can claim or even come close to, for that matter.
Yes, there are magnets in the Green Power juicer. At the core of each rotating twin gear is a serious of in-line magnets. When the twin gears are properly aligned, the two series of magnets produce a focused magnetic field of 2600 gauss in the minute 4/1000 inch clearance between the twin gears. As juice flows through this focused magnetic field, the water molecule clusters within the juice are opened allowing them to recombine with minerals such as calcium, potassium, sodium, and magnesium into new molecular structures. This magnetic process aids in extracting a greater percentage of mineral nutrients from the produce during the juicing process and is instrumental in keeping those minerals in a suspended colloidal form the body can use for a longer length of time.
What is far infrared? Is it safe?
How does the far infrared energy affect the juice?
In addition to keeping more enzymes intact because of less heat and friction, the Green Life also utilizes bioceramic and magnetic technologies, which helps to add more positive ions and vitality to minerals in the juice. Here's how it works: at the core of each of the twin gears is a series of magnets. The magnets are each three-quarters of an inch long and are alternated between positive and negative. When the two gears are placed side-by-side, the positive and negative magnets are also alternated between the gears, which generates a positive charge, or attraction. At the molecular level, this means the magnets are creating positive ions as the gears spin.
The twin gears are very unique in a way of using magnetic technology. In the core of the twin gears is a line of magnets that produce a focused magnetic field of 2600 gauss through which the juice flows during the juicing process.These are some of the more articulate expressions of the utility of the magnets I have found.
The first three are from the manufacturer of the first magnetised twin gear juicer - mainly from their FAQ.
I initially thought that - since the first manufacturer had included magnets to add items to their list of features; the next manufacturer had felt obliged to follow suite - primarily in order to match the features of the first juicer.
However it turns out all the juicers in question were designed by the same man - one Mr Kim - so that seems like a more plausible explanation for the shared feature.
The manufacturers do not appear to be doing a very good job of publicly making any sort of coherent case for using the magnets. They appear to have no scientific studies supporting their claims.
Moving juice through a magnetic field might improve it. Alternatively it might degrade it. Most likely it will do practically nothing at all. Until some scientific studies are performed it seems unlikely whether anyone will know for sure.
Similarly with irradiating it with infra-red radiation. Infra red radiation might typically help living tissues - by warming them up. Unfortunately the living tissues present in juice are most likely to be bacteria - and heating their growing medium slightly seems unlikely to help.
What seems likey to me to happen in this instance is that any radition produced will be rapidly absorbed by the stainless steel gears - and then re-radiated into the juice as "ordinary" infra-red radiation - i.e. as heat.
Maybe other effects are involved. Until some scientific studies are performed it seems unlikely whether anyone will know for sure.
Unfortunately, the current use of magnets in juicers appears to be based on ignorance and mumbo jumbo.
Why does this matter? I object when consumers are fed pseudo-scientific nonsense as part of a sales pitch.
I don't like rewarding the behaviour with financial contributions - and I don't like the idea of paying extra for the supposed feature.
Also, I suspect magnets are a significant part of the reason for the juicer being supplied with a plastic jug.