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A myth is not a lie. That is important to understand.
A myth usually arises from a genuine core — an observation, an experience, or a simplification that at some point went too far. It is passed on because it feels good or because it sounds simple. And eventually, almost everyone believes it — without anyone ever having asked if it is actually true.
Myths about natural products are particularly persistent. Because the longing for simple answers is great. Because nature is complex and we like to summarize it in clear sentences. And because some suppliers consciously exploit this longing — with terms that sound trustworthy but are empty in content.
Zeolite has fascinated us for years. And that is precisely why it annoys me when I read what some suppliers write about it — or what is presented as fact in forums, on social media, in well-meaning guidebooks, and even by zeolite dealers, even though it is simply 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 exaggeration to impress.
Zeolite is an extraordinary natural mineral with real, proven properties. It does not need false promises. It does not need terms that promise more than they can deliver. It only needs clarity.
Here are the myths I encounter most frequently — and what really lies 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 achieves the opposite of what zeolite deserves: trust.
Zeolite is not a panacea. It does not solve problems on its own. A 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 because zeolite is in its feed — if the husbandry is the problem.
Zeolite is a structural improver. It creates better conditions — for soil, for animals, for skin. That is remarkable enough. It does not need superlatives. And besides, it has nothing to do with miracles. By now, there is enough scientific material available. I receive an average of 2 new studies on zeolite in my inbox every week.
Myth 2: "Organic zeolite is better than normal zeolite."
There is no such thing as organic zeolite. Period.
A product can only be "organic" if that same product also exists in a non-organic form. Zeolite is stone. Stone cannot be organic. Only natural.
If a product is labeled "organic zeolite" anywhere — please be skeptical. It is either a misunderstanding or conscious marketing. Neither is a good sign of the care with which the product is manufactured. Such statements are said to have annoyed Prof. Dr. Hecht the most.
Myth 3: "All zeolites are the same."
There are over 40 naturally occurring zeolite species (which are called heulandite, chabazite, mordenite, natrolite, phillipsite) — and in addition, 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. Even here, there are two forms: those of sedimentary origin and those of volcanic origin. And even within the sedimentary form, there are differences: each deposit yields a mineral with a slightly different composition, different selectivity, and different cation exchange capacity.
Origin, extraction quality, and processing or grinding are decisive — and no two products are the same.
Myth 4: "100% clinoptilolite zeolite means 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 species — in contrast to synthetic or mixed zeolites.
However, this does not mean that the mineral consists of 100% pure clinoptilolite. In nature, clinoptilolite zeolite always contains other minerals and accompanying substances. "Clinoptilolite zeolite" is the name for the type in which clinoptilolite is the primary component. A clinoptilolite content of at least 85% is considered high-quality and is approved in the EU as a feed additive — that is the relevant quality standard.
But what should really make you prick up your ears: 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 apparent at first glance. A product consisting of 50% zeolite and 50% calcite has a completely different effect than pure clinoptilolite zeolite.
Therefore: Always ask about the exact composition. And about the clinoptilolite percentage — not just the product name.
Myth 5: "Zeolite raw material from Germany/Austria/Switzerland — that exists."
An important distinction is necessary here — between the origin of the raw material and the processing.
The raw material clinoptilolite does not come from German-speaking regions. In Germany, Austria, and Switzerland, there are no economically viable clinoptilolite deposits. The most important deposits are located in eastern Slovakia, Poland, Romania, Turkey, Ukraine, Norway, Cuba, and Iran. If anyone claims their clinoptilolite raw material comes from Austria or Germany — please ask specifically where exactly. This is geologically impossible.
Made in Austria means something different at STEINKRAFT: The raw material from eastern Slovakia is refined, ground, quality-controlled, and packaged in Austria using the tribomechanical AIR2AIR process. This processing step takes place in Austria — and it is decisive for the quality of the end product. No metal contact, no contamination, the crystal structure remains completely intact.
Raw material origin and processing are two different things. Anyone who communicates both clearly is acting transparently. Anyone who mentions only one of them leaves questions unanswered.
Myth 6: "Zeolite is a fertilizer."
Zeolite does not fertilize. It provides no or only very small amounts of nutrients itself.
What zeolite does: It improves the conditions under which nutrients remain available in the soil. It binds ammonium, holds potassium and magnesium in the root zone, and prevents leaching. It makes fertilizer more efficient — but it does not replace it.
Anyone who stops fertilizing because they are using zeolite will be disappointed. Anyone who 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 — firstly, it depends on what it is for, and secondly, on how it was ground.
For foliar fertilizers and skincare, <8 µm is needed — 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 method becomes. And here lies a problem that many suppliers 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, and the more abrasion occurs. An ultra-fine zeolite powder produced with a ball mill very likely has significant metal contamination — which you cannot see, smell, or taste.
The magnet test: Put zeolite in a glass of water, stir it, and hold a magnet to the glass from the outside. If a black cloud forms — metal contamination. This product should not be used, neither for animals nor for the skin nor for the soil.
STEINKRAFT uses the tribomechanical AIR2AIR process: zeolite particles collide with each other in an airflow — without any metal contact. The crystal structure remains intact, no abrasion, no contamination. That is the difference between an ultra-fine product that is truly 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 cause harm in normal amounts. But the more common problem is a different one: too little, not too much.
Many people sprinkle a thin layer of zeolite and are disappointed when nothing happens. Anyone who uses too little will not see a difference — and will draw the wrong conclusion for their soil that zeolite does not work.
The correct dosage for the respective purpose is decisive. Our dosage table provides reliable reference values.
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 — regarding watering behavior or soil moisture, initial differences are often noticeable after just a few weeks.
But the true strength of zeolite lies in the long term. A soil that is improved with zeolite over years develops a structure, storage capacity, and vibrancy that is hardly visible after one season, but clearly noticeable after two years.
Zeolite is not a quick fix. It is a structural decision. Those who understand 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 get used up — it becomes part of the soil matrix.
What is sensible: annual smaller supplementary amounts, because zeolite can migrate deeper over time due to intensive tilling. But a complete replacement every year is neither necessary nor sensible.
A refresh in the 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 frequently misunderstood myths about 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 debated.
What does aluminosilicate mean?
Clinoptilolite is an aluminosilicate — meaning: 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 detached 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 must be evaluated completely differently from a physiological standpoint.
Crucially, however: This aluminum is firmly and permanently integrated into the silicate framework through covalent bonds. Under physiological conditions, it is not bioavailable — meaning: it does not leach out, it does not enter the blood, and it does not accumulate in the animal's body.
The crystal lattice is immune to stomach acid and other digestive juices. Even if minimal traces of aluminum were to dissolve in an acidic environment — studies show that this does not enter the bloodstream but is excreted with the feces.
What animal studies show: In studies with cattle, pigs, and poultry, supplementation of clinoptilolite in animal feed showed no increased aluminum load in the blood or tissues. Prof. Dr. Karl Hecht also documented no increased aluminum levels in the animal body in long-term observations. No load from high-quality clinoptilolite zeolite was proven in any study.
Even more: The high silicon content in zeolite actively reduces the bioavailability of free aluminum. The same silicon that keeps the crystal lattice stable is simultaneously considered in research to be a natural antagonist of free aluminum in the digestive tract.
High-quality clinoptilolite zeolite does not burden the animal body with aluminum. On the contrary — it can bind free aluminum from feed and excrete it via feces.
Myth 12: "Zeolite products are all aluminum-free and safe."
This myth is the flip side of Myth 11 — and equally important.
The aluminum WITHIN the crystal lattice is not a problem — we cleared that up earlier. However: Some zeolite products on the market are indeed contaminated with aluminum, lead, or other heavy metals. Consumer advice centers explicitly warn against this and recommend always asking the manufacturer for a current analysis.
Where does this contamination come from? Not from the mineral itself — but from the grinding method. Conventional ball mills grind with rotating metal balls made of iron, chromium, and nickel. The longer it is ground, and the finer the powder is intended to be, the more metal abrasion gets into the product. This abrasion indeed contains metals — 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 poor grinding methods.
So, anyone who wants to be truly 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 airflow without any metal contact. No abrasion. No contamination. That is the difference.
The simplest test: Put zeolite in water and hold a magnet to the outside of the glass. If a black cloud forms — iron abrasion from the mill. Aluminum does not react to a magnet, but iron — the main component of mill abrasion — does. A positive magnet test shows: this product does not belong in the animal body or the soil.
Read more
What is zeolite? Formation, effect & quality
Everything about crystal lattices, ion exchange and why quality is everything when it comes to zeolite. →
Myth 13: “Zeolite is too expensive — no farmer can afford it.”
This myth arises when one only looks at the purchase price — and not the total calculation. Anyone viewing zeolite as an isolated expense is asking the wrong question. The right question is: What does zeolite save?
In plant production: Normally, only 30–40% of the nitrogen applied 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 root can absorb it. Studies show: A combination of clinoptilolite and only 75% of the recommended fertilizer amount provided the same yield as 100% fertilizer alone. Less fertilizer. Same yield.
In animal husbandry: Better feed conversion means less feed required for the same growth. Healthier animals mean lower veterinary costs and less medication use. After slurry application, zeolite remains in the field as a soil conditioner — it pays off a second time.
Zeolite does not wear out. It remains active in the soil and the cycle for years. The initial investment is an investment in the structure, in the soil's ability to get more out of what is already there. The question of cost looks completely different when you consider the effect over three seasons rather than the price per kilogram.
And for operations that use zeolite in large quantities: As a raw material, zeolite is a comparatively inexpensive mineral — what drives the price is the quality of the processing. Those who buy cheap, coarsely and improperly ground zeolite save on the purchase price but lose out on the effect. That is the real question of cost.
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 does not work in general.
Here is the crucial fact: The most important scientific studies that have demonstrated positive effects of zeolite — that we are aware of — were conducted using tribomechanically activated zeolite (TMAZ). This applies to the research by Prof. Dr. Karl Hecht, to clinical studies with PMA zeolite, and to agricultural crop and animal trials. There are other studies too — but the foundation of knowledge the industry relies on comes almost exclusively from TMAZ research. Not from ball-mill products.
Why is this so significant? In a ball mill, zeolite particles are ground and crushed by rotating metal balls. The result: the inner crystal lattices — the very cavities where adsorption and ion exchange take place — are compressed, severely limiting their effectiveness. The mineral looks like powder, but does not function like tribomechanically mineralized and activated zeolite.
What makes tribomechanical activation different:
✓ Particles collide with each other in an airflow — no metal contact, no abrasion
✓ Crystal lattices are opened rather than crushed — the active surface area increases enormously
✓ Electrostatic charge is created — increases adsorption capacity
✓ No metal abrasion in the final product — purity is maintained
✓ Fineness below 8 µm possible — without loss of quality
Tribomechanical activation goes back to Dr. Tihomir Lelas — his invention was the origin of all products known in agriculture today under the names Megamin, Herbagreen, TMAZ, and others. The same technology. Always without a ball mill.
If someone says, “Zeolite didn’t do anything for me” — the first question should be: What milling process? Because a zeolite that has been ground in a ball mill, contaminated, and crushed in its crystal lattice is not the same mineral that was used in the studies.
Myth 15: “Zeolite is only suitable for cat litter.”
This statement comes from a frequently cited article by the Consumer Center — and it is a good example of how a legitimate warning against exaggerated health claims can lead to a blanket rejection that does not do justice to this mineral.
The criticism from the Consumer Center is directed at specific, insufficiently substantiated health claims for human internal consumption — and in some points, they are certainly correct: whoever 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 entirely different areas:
What zeolite is proven to do and what it is used for:
✓ Animal feed additive: EU-approved as feed additive E568 — regulated, tested, safe
✓ Barn hygiene & slurry: Proven to bind ammonia, improves barn air, reduces climate emissions
✓ Agriculture & gardening: Improves soil structure, retains nutrients, stores water — scientifically proven many times over
✓ Cosmetics & skincare: Binds pollutants and bacteria on the skin — external application
✓ Industry: Water treatment, lead-free 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 greatest environmental disasters in history, that is EU-approved as an animal feed additive, and that has been used in agriculture worldwide for decades — reducing it to cat litter is factually incorrect.
The legitimate message behind the warning is different: Not every promise about zeolite is substantiated. Quality and area of application are the deciding factors. And that is exactly the essence of everything we talk about in this article.
Myth 16: “Zeolite binds vitamins and proteins in the animal body.”
We encounter this concern regularly — and it is understandable. Anyone who uses zeolite as a feed additive and knows that the mineral binds pollutants might rightly ask: Doesn't it also bind nutrients?
The answer is no — and the reason lies in the physics of the crystal lattice.
Clinoptilolite zeolite functions 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, as well as 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 cannot pass 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 increased 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 literature that it can happen that vitamins and trace elements are temporarily bound to the mineral surface — before they are released again in the course of the digestive tract. The extent of this effect 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 not by chance. It is the physics of a mineral that evolved over millions of years to do exactly that.
Zeolite does not need myths. It is fascinating enough as it is — a mineral that formed over millions of years, was used in Chernobyl, was known to Cleopatra, and is better understood by modern soil science today than ever before.
Myth 17: “Zeolite contains a lot of lead — that is dangerous.”
This myth contains a kernel of truth — and yet it leads in the wrong direction.
Yes: Clinoptilolite zeolite can contain small amounts of lead. This is not surprising — zeolite is a mineral that formed in the Earth's crust over millions of years and absorbed surrounding substances in the process. The average lead content of the Earth's crust is approx. 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 detect the lead bound in the zeolite analytically, one needs aqua regia — 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 supplement in feed showed no significant increase in lead concentration in blood or tissues
✓ In a 2021 clinical study, subjects 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 comply with defined limit values
There is even an interesting logic behind it: A zeolite that has no affinity for lead at all cannot bind any lead from the body either. The selectivity is both: the reason for a certain natural lead content and the reason for the ability to eliminate lead.
The real lead danger with zeolite products comes — as with aluminum — not from the mineral itself, but from metal abrasion caused by poor milling processes. Freely available lead from ball mills is bioavailable. The naturally bound lead in the crystal lattice is not.
Myth 18: “Zeolite always works the same for every animal.”
This myth has two faces: Some expect zeolite to work immediately and with the same intensity for every animal. Others conclude from a single observation — “it didn’t do anything for my animal” — that zeolite does not work in general. Both fall short.
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 already kept under optimal conditions. An animal in poor barn air benefits more visibly than one in a well-ventilated barn.
Animal species and digestive systems play a role. Horses, cattle, pigs, poultry, and dogs have different digestive times, different stomach pH values, and different transit times. What helps significantly and visibly in a horse during molting might act more quietly and slowly in another animal under different conditions.
Zeolite is most effective when there is work to be done: contaminated feed, high exposure to pollutants, molting, 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 that this product does not work. The expectation that a natural mineral always works the same way 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 counts 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 has a geologically unique composition. A high clinoptilolite content alone says nothing about the heavy metal burden — 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 values. There are deposits with a high clinoptilolite content and increased heavy metal values. Both are possible — the percentage alone says nothing about this.
What Prof. Dr. Hecht emphasized time and again — the five quality levels:
✓ Si:Al ratio — at least 6:1, determines crystal quality and selectivity
✓ Heavy metal analysis — mandatory, regardless of clinoptilolite content
✓ Mining method — careful mining without cross-contamination, quality control on-site
✓ Transport & storage — closed big bags instead of bulk goods, seamless control from mining to filling
✓ Milling process — tribomechanical instead of ball mill, so the crystal lattice remains intact and no metal abrasion occurs
A high clinoptilolite content on the label is not a quality feature. A comprehensive assessment is — Si:Al ratio, heavy metal values, mining standards, transport conditions, and milling process. Whoever mentions only the percentage and hides 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 reservoirs for soils, pots, or raised beds. What is not explained: a 3 mm grain has a vanishingly small outer surface area in relation to its volume. Water is mainly bound to surfaces — and most of a zeolite's surface area is not on the outside, but on the 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 piece of zeolite of 3 mm therefore binds significantly less water than the same mineral in fine powder form — because the majority of the active structure remains trapped inside the grain and is unreachable.
How grain size influences water retention:
▪ 3 mm grains: Very small external surface area, internal pores barely accessible → binds little to very little water relative to the amount used
▪ 0.5–1 mm granulate (BODENKRAFT PUR): Significantly more surface area, better accessibility of the internal structure → good water storage, 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 grains has only a fraction of that accessible. Therefore, anyone using zeolite for water storage who chooses coarse grains will need many times the amount to achieve the same effect — or may see none at all.
Coarse zeolite is not worthless — but its strength lies in soil structure and aeration, not in maximum water retention. Those whose primary goal is water storage need finer zeolite. Those who want both — structure and water retention — should ideally combine both grain sizes.
→ More on the optimal grain size for each application
The clearer and more objective we are when talking about this, the more trust is built — and the better zeolite can perform what it is truly meant to do.
Nature needs no exaggerations. And we must get involved and understand nature.
More about zeolite at STEINKRAFT:
→ What is zeolite? Formation, effect & quality
→ What you should know about zeolite — before you buy
→ Zeolite in the garden — the comprehensive guide
→ View all STEINKRAFT products
