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A myth is not a lie. It is important to understand this.
A myth usually arises from a real core — an observation, an experience, a simplification that at some point went too far. It is retold because it feels good or sounds plausible. And before long, almost everyone believes it — without anyone asking whether it is actually true.
Myths about natural products are particularly persistent. Because the desire for simple answers is great. Because nature is complex and we like to put it into clear sentences. And because some providers deliberately exploit this desire — with terms that sound trustworthy but are empty in substance.
Zeolite has fascinated us for years. And that is exactly why it annoys me when I read what some providers write about it — or what is presented as fact in forums, on social media, in well-meaning guides, and also by zeolite dealers, even though it simply is not true.
Debunking myths is not criticism. It is respect — for the mineral, for the people who buy it, and for nature, which needs no exaggerations to impress.
Zeolite is an extraordinary natural mineral with real, proven properties. It needs no false promises. It needs no terms that promise more than they can deliver. It only needs clarity.
Here are the myths I encounter most often — and what is really behind them.
Myth 1: “Zeolite is a miracle cure.”
This is the myth that worries me the most — not because it is intended maliciously, but because it has the opposite effect of what zeolite deserves: trust.
Zeolite is not a cure-all. It does not solve problems on its own. Sick soil will not become healthy just because you sprinkle zeolite on it — if the basic conditions are not right. A weakened animal will not become strong just because zeolite is in its feed — if the housing is the problem.
Zeolite is a structural improver. It creates better conditions — for soils, for animals, for skin. That is remarkable enough. It needs no superlatives. And besides, it has nothing to do with miracles. By now, there is enough scientific material. I receive an average of 2 new studies on zeolite in my inbox every week.
Myth 2: “ORGANIC zeolite is better than regular zeolite.”
ORGANIC zeolite does not exist. Period.
A product can only be organic if it also exists in a non-organic form. Zeolite is stone. Stone cannot be organic. Only natural.
If “ORGANIC zeolite” is written anywhere — please question it. It is either a misunderstanding or deliberate marketing. Neither is a good sign of the care with which the product is manufactured. Such statements are what have annoyed Prof. Dr. Hecht the most.
Myth 3: “All zeolites are the same.”
There are over 40 naturally occurring types of zeolite (they are then called heulandite, chabazite, mordenite, natrolite, phillipsite) — and then there are synthetically produced variants. They differ fundamentally in their structure, their properties, and their suitability for different applications.
For biological applications in humans, animals, and soil, only clinoptilolite zeolite is relevant. There are already two forms here, those of sedimentary origin and those of volcanic origin. And even within the sedimentary form, there are differences: Every deposit produces a mineral with a slightly different composition, different selectivity, and different cation exchange capacity.
Origin, extraction quality, and processing or grinding are crucial — and no product is like another.
Myth 4: “100% clinoptilolite zeolite means that the mineral consists of 100% clinoptilolite.”
No — and I often encounter this confusion. “100% clinoptilolite zeolite” is a designation for the mineral type. A product bearing this designation comes exclusively from the clinoptilolite type — in contrast to synthetic or mixed zeolites.
But this does not mean that the mineral consists of 100% pure clinoptilolite. In nature, clinoptilolite zeolite always contains other minerals and accompanying substances as well. Clinoptilolite zeolite is the name of this type, in which clinoptilolite is the highest component. A clinoptilolite content of at least 85% is considered high-quality and is approved as a feed additive in the EU — that is the relevant quality standard.
But what really should make you stop and listen: Some products on the market are mixed with calcite, herbs, or other rock flours — without this being communicated transparently. This significantly lowers the actual clinoptilolite content without it being noticeable at first glance. A product that consists of 50% zeolite and 50% calcite has a completely different effect than pure clinoptilolite zeolite.
Therefore: Always ask about the exact composition.
Myth 5: “Zeolite raw material from Germany/Austria/Switzerland — that exists.”
An important distinction is needed here — between the origin of the raw material and processing.
The raw material clinoptilolite does not come from the German-speaking region. There are no economically usable clinoptilolite deposits in Germany, Austria, or Switzerland. The most important deposits are in eastern Slovakia, Poland, Romania, Turkey, Ukraine, Norway, Cuba, and Iran. If someone claims that their clinoptilolite raw material comes from Austria or Germany — please ask specifically where exactly. This is geologically not possible.
Made in Austria means something else at STEINKRAFT: The raw material from eastern Slovakia is refined, ground, quality-controlled, and bottled in Austria using the tribomechanical AIR2AIR process. This processing step takes place in Austria — and it is crucial for the quality of the final product. No metal contact, no contamination, the crystal structure remains completely intact.
Raw material origin and processing are two different things. Whoever communicates both clearly acts transparently. Whoever only mentions one of them leaves questions unanswered.
Myth 6: “Zeolite is a fertilizer.”
Zeolite does not fertilize. It provides little or no nutrients itself.
What zeolite does: It improves the conditions under which nutrients remain available in the soil. It binds ammonium, keeps potassium and magnesium in the root zone, and prevents leaching. It makes fertilizer more efficient — but it does not replace it.
Whoever stops fertilizing because they use zeolite will be disappointed. Whoever understands zeolite as a structural soil improver will be amazed.
Myth 7: “The finer, the better — ultra-fine is always the right choice.”
“Ultra-fine” is not a protected term. And finer is not automatically better — it depends, firstly, on what it is for, and secondly, on how it was ground.
For foliar fertilizer and skin care, it needs to be <8 µm — because leaf openings and skin pores have this size. For soil, <100 µm is sufficient. For animal feed, 14–35 µm is optimal. So far, so good.
But: The finer the zeolite is ground, the more important the question of the grinding process becomes. And here lies a problem that many providers do not address.
Conventional ball mills grind with rotating metal balls. This creates metal abrasion — iron, chromium, nickel — which gets directly into the powder. The finer it is ground, the longer the mill runs, the more abrasion is created. An ultra-fine zeolite powder that was produced with a ball mill has a high probability of significant metal contamination — which you cannot see, smell, or taste.
The magnet test: Put zeolite in a glass of water, stir, and hold a magnet against the glass from the outside. Does a black cloud form — metal contamination. This product should not be used, neither for animals nor for skin nor for soil.
STEINKRAFT uses the tribomechanical AIR2AIR process: Zeolite particles collide with each other in the air stream — without any metal contact. No abrasion. No contamination. The crystal structure remains intact. That is the difference between an ultra-fine product that is really clean — and one that only claims to be.
Myth 8: “More zeolite helps more.”
An overdose is not dangerous — zeolite is chemically inert and does not harm in normal amounts. But the more frequent problem is different: too little, not too much.
Many people sprinkle a thin layer of zeolite and are disappointed when nothing happens. Whoever uses too little sees no difference — and draws the wrong conclusion for their soil that zeolite does not work.
The right dosage for the respective purpose is crucial. Our dosage table provides reliable guidelines.
Read more
7 mistakes when using zeolite in the garden
Too little is the most common mistake. What else goes wrong — and how to avoid it. →
Myth 9: “Zeolite works immediately.”
Sometimes yes — with watering behavior or soil moisture, the first differences are often noticeable after just a few weeks.
But the real strength of zeolite lies in the long term. A soil that is improved with zeolite over years develops a structure, storage capacity, and vitality that is hardly visible after one season, but clearly noticeable after two years.
Zeolite is not a quick solution. It is a structural decision. Whoever understands this will not be disappointed.
Myth 10: “Zeolite must be completely replaced every year.”
Zeolite is very stable and remains active in the soil for many years. It does not wear out — it becomes part of the soil matrix.
What makes sense: smaller annual supplementary doses, because zeolite can migrate deeper over time through intensive tilling. But a complete replenishment every year is neither necessary nor sensible.
A refresh in spring with 0.5–1 kg/m² is completely sufficient for most soils.
Myth 11: “Zeolite contains aluminum — that is dangerous for animals and soil.”
This is one of the most persistent and at the same time most misunderstood myths surrounding zeolite. It sounds logical at first glance — and is clearly refutable at second glance.
Yes: aluminum is a structural component of the clinoptilolite crystal lattice. The basic framework of the mineral consists of silicon (SiO₄) and aluminum (AlO₄) — this is chemically correct and cannot be argued away.
What does aluminosilicate mean?
Clinoptilolite is an aluminosilicate — this means: aluminum (Al) and silicon (Si) together with oxygen (O) form the three-dimensional crystal lattice. Silicon-oxygen tetrahedra (SiO₄) and aluminum-oxygen tetrahedra (AlO₄) are firmly linked to each other by covalent Al-O-Si bonds. These bonds are among the strongest in chemistry — the aluminum is thus a building block of the framework itself, not a free ion. It cannot be dissolved without destroying the entire crystal lattice. This is the fundamental difference to free aluminum, as found in aluminum salts or antacids — and this is the reason why the aluminum in clinoptilolite is physiologically completely different to evaluate.
But the crucial thing is: This aluminum is firmly and permanently incorporated into the silicate framework by covalent bonds. It is under physiological conditions not bioavailable — this means: it does not dissolve out, it does not get into the blood, it does not accumulate in the animal body.
The crystal lattice is immune to stomach acid and other digestive juices. Even if minimal traces of aluminum should dissolve in an acidic environment — studies show that this does not get into the bloodstream, but is excreted with the feces.
What animal studies show: Clinoptilolite addition in animal feed showed no increased aluminum load in blood or tissues in studies with cattle, pigs, and poultry. Prof. Dr. Karl Hecht also documented no increased aluminum values in the animal body in long-term observations. A load through high-quality clinoptilolite zeolite was not proven in any study.
Even more: The high silicon in zeolite actively reduces the bioavailability of free aluminum . The same silicon that keeps the crystal lattice stable is at the same time considered in research as a natural antagonist of free aluminum in the digestive tract.
High-quality clinoptilolite zeolite does not load the animal body with aluminum. On the contrary — it can bind free aluminum from the feed and excrete it via the feces.
Myth 12: “Zeolite products are all aluminum-free and safe.”
This myth is the flip side of Myth 11 — and just as important.
The aluminum IN the crystal lattice is not a problem — we clarified that earlier. But: Some zeolite products on the market are actually contaminated with aluminum, lead, or other heavy metals. The consumer protection agency expressly warns against this and recommends always asking the manufacturer for an up-to-date analysis.
Where does this contamination come from? Not from the mineral itself — but from the grinding process. Conventional ball mills grind with rotating metal balls made of iron, chromium, and nickel. The longer it is ground, the finer the powder is to become, the more metal abrasion gets into the product. This abrasion actually contains metals — and in a form that can dissolve.
The irony: The fear of aluminum is aimed at the wrong target. The natural aluminum in the crystal lattice is harmless. The real danger can arise from a bad grinding process.
Whoever really wants to be safe,
should not ask “Does the zeolite contain aluminum?"
— but “How was this zeolite ground?"
STEINKRAFT uses the tribomechanical AIR2AIR process — zeolite particles collide with each other in the air stream, without any metal contact. No abrasion. No contamination. That is the difference.
The simplest test: Put zeolite in water and hold a magnet against the glass from the outside. Does a black cloud form — iron abrasion from the mill. Aluminum does not react to a magnet, but iron — the main component of the mill abrasion — does. A positive magnet test shows: this product does not belong in the animal body and not in the soil.
Read more
What is zeolite? Formation, effects & quality
Everything about crystal lattices, ion exchange and why quality is paramount when it comes to zeolite →
Myth 13: “Zeolite is too expensive — no farmer can afford it.”
This myth arises when you only look at the purchase price — and not the overall calculation. Anyone who views zeolite as an isolated expense has asked the wrong question. The right question is: What does zeolite save?
In crop production: Normally, only 30–40% of the applied nitrogen reaches the plant. The rest is leached out or escapes into the air as ammonia — paid for, but lost. Zeolite binds ammonium nitrogen in its crystal lattice and releases it gradually, exactly when the roots can absorb it. Studies show: A combination of clinoptilolite and only 75% of the recommended fertilizer amount yielded the same as 100% fertilizer alone. Less fertilizer. The same yield.
In animal husbandry: Better feed utilization means less feed required for the same growth. Healthier animals mean lower veterinary costs and less use of medication. Zeolite remains in the field as a soil conditioner after manure application — it pays off a second time.
Zeolite is not consumed. It remains active in the soil and in the cycle for years. The initial investment is an investment in the structure, in the soil's ability to make more out of what is already there. The question of cost is completely different when you look at the effect over three seasons rather than the price per kilogram.
And for businesses that use zeolite in large quantities: Zeolite is a relatively inexpensive mineral as a raw material — what drives the price is the quality of processing. Anyone who buys cheap, coarse, and improperly ground zeolite saves on the purchase but loses out on the effect. That is the real cost issue.
Myth 14: “The milling process doesn't matter — zeolite is zeolite.”
This is the opposite of the truth — and this myth is particularly consequential because it leads people to buy cheap, poorly processed zeolite powder, see no effect, and then conclude that zeolite generally does not work.
Here is the crucial fact: The most important scientific studies that have shown positive effects of zeolite — those we are aware of — were conducted with tribomechanically activated zeolite (TMAZ). This applies to the research of Prof. Dr. Karl Hecht, the clinical studies with PMA zeolite, and the plant and animal trials in agriculture. There are also other studies — but the foundation of the knowledge the industry relies on comes almost exclusively from TMAZ research. Not from ball mill products.
Why is this so important? In a ball mill, zeolite particles are crushed and squeezed by rotating metal balls. The result: The internal crystal lattices — exactly those cavities where adsorption and ion exchange take place — are compressed and their effectiveness severely restricted. The mineral looks like powder, but it does not work like tribomechanically mineralized and activated zeolite.
What makes tribomechanical activation different:
✓ Particles collide in the airflow — no metal contact, no abrasion
✓ Crystal lattices are opened instead of crushed — the active surface area increases enormously
✓ Electrostatic charging is created — increases adsorption capacity
✓ No metal abrasion in the final product — purity is preserved
✓ Fineness below 8 µm possible — without loss of quality
Tribomechanical activation dates back to Dr. Tihomir Lelas — his invention was the origin of all products that are known today in agriculture under the names Megamin, Herbagreen, TMAZ, and others. The same technology. Always without a ball mill.
When someone says “Zeolite did nothing for me” — the first question should be: Which milling process? Because zeolite ground with ball mills, contaminated, and crushed in its crystal lattices is not the same mineral that the studies were conducted with.
Myth 15: “Zeolite is only suitable for cat litter.”
This statement comes from a widely cited article by the German consumer protection agency — and it is a good example of how a justified warning against exaggerated health claims can lead to a blanket rejection that does not do this mineral justice.
The consumer protection agency's criticism is directed at specific, insufficiently supported health claims for internal consumption by humans — and in some respects, it is quite right: Anyone who promotes zeolite as a miracle cure for cancer or as a universal detox agent is exaggerating.
But to conclude from this that zeolite is “only suitable for cat litter” ignores decades of scientific research and practical application in completely different areas:
What zeolite is proven to do and what it is used for:
✓ Animal feed additive: EU-wide approved as feed additive E568 — regulated, tested, safe
✓ Barn hygiene & manure: Proven to bind ammonia, improves barn air, reduces climate emissions
✓ Agriculture & gardening: Improves soil structure, retains nutrients, stores water — scientifically proven in many ways
✓ Cosmetics & skincare: Binds pollutants and bacteria on the skin — external application
✓ Industry: Water treatment, unleaded gasoline, road construction
✓ Disaster relief: 22,000 tons used after Chernobyl for decontamination
A mineral that was used as a solution in one of the largest environmental disasters in history, that is EU-wide approved as an animal feed additive, and that has been used in agriculture worldwide for decades — to reduce it to cat litter is factually wrong.
The justified message behind the warning is different: Not every claim about zeolite is supported. Quality and application area decide. And that is exactly the core of everything we are talking about in this article.
Myth 16: “Zeolite binds vitamins and proteins in the animal's body.”
This concern is regularly raised — and it is understandable. Anyone who uses zeolite as a feed additive and knows that the mineral binds pollutants will rightly ask: Doesn't it also bind nutrients?
The answer is no — and the reason for this lies in the physics of the crystal lattice.
Clinoptilolite zeolite works like a molecular sieve. Its pores and channels have a precisely defined size — 0.4 to 0.7 nanometers. Only particles that are small enough and positively charged fit inside. These are heavy metal ions such as lead, cadmium, and mercury, ammonium, mycotoxins, and radionuclides.
Vitamins, proteins, and amino acids simply do not fit into the lattice. A protein can be a thousand times larger than a heavy metal ion — it does not fit through the pores. Vitamins and amino acids are also too large and/or not positively charged. They remain in the animal's body and are absorbed by the body.
Studies with dogs even showed slightly elevated protein and calcium levels in the blood when fed zeolite — an indication of improved nutrient utilization, not loss.
A comparison that is often mentioned: Even some bentonite manufacturers themselves describe in their product documentation that vitamins and trace elements can temporarily bind to the mineral surface — before being released again during digestion. How pronounced this effect is in practice is assessed differently. With clinoptilolite zeolite, this question does not even arise due to the defined pore size.
Zeolite removes what does not belong in the animal's body. What does belong — nutrients, vitamins, amino acids — it leaves alone. This is no coincidence. This is the physics of a mineral that formed over millions of years so that it can do exactly this.
Zeolite does not need myths. It is fascinating enough as it is — a mineral that formed over millions of years, that was used in Chernobyl, that Cleopatra knew, and that modern soil science understands better today than ever before.
Myth 17: “Zeolite contains a lot of lead — that is dangerous.”
This myth contains a kernel of truth — and yet leads in the wrong direction.
Yes: Clinoptilolite zeolite can contain small amounts of lead. This is not surprising — zeolite is a mineral that formed over millions of years in the Earth's crust and absorbed substances from its surroundings. The average lead content of the Earth's crust is around 15 ppm. A zeolite that has a high affinity for lead — and that is a quality characteristic — will naturally have bound small amounts of it over thousands of years.
The crucial point: This lead is firmly bound in the crystal lattice by Van der Waals forces. It cannot be released under physiological conditions. To analytically prove the lead bound in zeolite, aqua regia is required — a mixture of concentrated hydrochloric acid and concentrated nitric acid, one of the strongest acids of all. These conditions do not exist in the digestive tract.
What studies show:
✓ Clinoptilolite additive in feed showed no significant increase in lead concentration in blood or tissues
✓ In a clinical study in 2021, participants taking zeolite absorbed up to 90% less lead than the placebo group — zeolite binds lead and does not release it
✓ High-quality zeolite is tested for heavy metals and must meet defined limits
There is even an interesting logic behind this: A zeolite that has no affinity for lead at all cannot bind lead from the body. The selectivity is both: the reason for a certain natural lead content and the reason for the ability to remove lead.
The real lead danger with zeolite products comes — as with aluminum — not from the mineral itself, but from metal abrasion due to poor milling processes. Free lead from ball mills is bioavailable. Naturally bound lead in the crystal lattice is not.
Myth 18: “Zeolite always works the same in every animal.”
This myth has two sides: Some expect zeolite to work immediately and equally strongly in every animal. Others conclude from a single observation — “it did nothing for my animal” — that zeolite generally does not work. Both are too narrow.
Zeolite is not a medication with a fixed dose-response curve. It is a physically active mineral — and its effect depends on what is present in the animal's body that can be bound. An animal with a high mycotoxin load in its feed will show clearer effects than one that is already kept under optimal conditions. An animal with contaminated barn air will benefit more visibly than one in an already well-ventilated barn.
Animal species and the digestive system play a role. Horses, cattle, pigs, poultry, and dogs have different digestion times, different stomach pH levels, and different transit times. What clearly helps a horse during shedding may work more quietly and slowly in another animal under different conditions.
Zeolite works most clearly when there is something to do: contaminated feed, high pollutant exposure, shedding, stress, diarrhea, poor barn air. The healthier and less burdened an animal already is, the less visible — but no less real — the effect is. Prevention is harder to measure than therapy.
Anyone who sees no effect with an inferior product has not proven that zeolite does not work — but rather that this product does not work. The expectation that a natural mineral will always work the same in every animal under every condition does not correspond to the reality of living systems. And that is not a weakness — that is the nature of natural products.
Myth 19: “The higher the clinoptilolite content, the better.”
Prof. Dr. Karl Hecht expressly denied this — and it is worth understanding why.
What really matters is not the pure clinoptilolite content, but the ratio of silicon to aluminum in the crystal lattice — the Si:Al ratio. It should be at least 6:1. This ratio determines the stability of the crystal structure, the selectivity of the ion exchange, and the actual effectiveness.
In addition: Every clinoptilolite deposit is geologically uniquely composed. A high clinoptilolite content alone says nothing about the heavy metal load — that depends on the specific geology of the deposit, not the percentage. There are deposits with a high clinoptilolite content and very low heavy metal levels. There are deposits with a high clinoptilolite content and elevated heavy metal levels. Both are possible — the percentage alone says nothing about this.
What Prof. Dr. Hecht repeatedly emphasized — the five quality levels:
✓ Si:Al ratio — at least 6:1, determines crystal quality and selectivity
✓ Heavy metal analysis — mandatory regardless of the clinoptilolite content
✓ Mining method — careful mining without cross-contamination, quality control on site
✓ Transport & storage — closed BigBags instead of bulk goods, continuous control from mining to filling
✓ Milling process — tribomechanical instead of ball mill, so that the crystal lattice remains intact and no metal abrasion occurs
A high clinoptilolite content on the label is not a quality characteristic. The overall assessment is — Si:Al ratio, heavy metal levels, mining standards, transport conditions, and milling process. Anyone who only mentions the percentage and conceals the rest is answering the wrong question.
Myth 20: “Zeolite binds water — regardless of the grain size.”
Yes — and no. Zeolite binds water. That is fundamentally correct. But how much water a zeolite product can bind depends crucially on the grain size. And here there are worlds between a fine powder and a coarse granulate.
We see products on the market with grains of 3 mm and more — advertised as water storage for soils, pots, or raised beds. What is not explained here: A 3-mm grain has a vanishingly small external surface area relative to its volume. Water is mainly bound to surfaces — and most of the surface area of a zeolite is not on the outside, but inside, in the fine pores and channels of the crystal lattice.
The larger the grain, the less of this internal surface area is accessible. A coarse zeolite piece of 3 mm therefore binds significantly less water than the same mineral in fine powder form — because the majority of the active structure remains enclosed inside the grain and is inaccessible.
How particle size affects water retention:
▪ 3 mm granules: Very small external surface area, internal pores barely accessible → retains little to very little water relative to the amount used
▪ 0.5–1 mm granules (BODENKRAFT PUR): Significantly more surface area, better accessibility of the internal structure → good water retention, ideal for soil and raised beds
▪ Fine powder (<100 µm): Enormous active surface area, maximum accessibility of the crystal pores → best water retention per gram of zeolite used
One gram of fine zeolite powder has an internal surface area of several hundred square meters. One gram of 3 mm granules has only a fraction of that accessible. So if you use zeolite for water retention and choose coarse granules, you need many times the amount for the same effect — or simply see no effect at all.
Coarse zeolite is not worthless — but its strength lies in soil structure and aeration, not in maximum water retention. If water retention is your primary goal, you need finer zeolite. If you want both — structure and water retention — it is best to combine both particle sizes.
→ More on the optimal particle size for each application
The clearer and more objective we speak about it, the more trust is built — and the better zeolite can do what it was really made for.
Nature needs no exaggerations. And we must be willing to engage with it and understand it.
More about zeolite at STEINKRAFT:
→ What is zeolite? Formation, effects & quality
→ What you should know about zeolite — before you buy
→ Zeolite in the garden — the comprehensive guide
→ View all STEINKRAFT products
