Prof. Karl Hecht – Pioneer of zeolite science explains what is missing in livestock farming
Imagine giving an animal exactly what it would seek out for itself in nature. Not as an experiment – but because research has proven it for decades. Prof. Dr. Dr. med. Karl Hecht summarized this in a groundbreaking specialist article. And we believe: this belongs on every farm.
Who is Prof. Karl Hecht?
Prof. Dr. Dr. med. Karl Hecht was an emeritus professor and one of the most renowned researchers in the German-speaking world when it comes to the effects of natural minerals on humans and animals. In his article "Ecologically clean food products", published in the specialist journal OM & Ernährung (2015, No. 152), he asked a question that every farmer really should be asking:
Why does an animal in industrial farming not get what it would seek out for itself in the wild?
Animals heal themselves – if you let them
In nature, many animals instinctively practice what is known as zoopharmacognosy – the scientific term for self-medication. Bears, sheep, cows, chickens, even monkeys: they all eat specific soils and minerals when their bodies need them.
The Brazilian biologist Eraldo Medeiro Costa-Neto has researched this behavior extensively. His finding: geophagy – the consumption of soil and clay minerals – is particularly pronounced in herbivorous animals. And it serves very specific purposes:
- Mineral supply (calcium, magnesium, potassium, silicon, and much more)
- Detoxification (heavy metals, ammonia, mycotoxins)
- Protection against parasites
- Neutralization of acidity
- Strengthening the immune system
- Support for bone health
In Siberia and the Far East, scientists observed that free-roaming domestic animals – cows, sheep, goats, chickens – specifically consumed silicon-containing minerals of the zeolite group. Before mating season and during pregnancy, bears consumed particularly large quantities of zeolite rock.
That is no coincidence. That is natural intelligence.
The problem: Exactly this is missing in factory farming
Prof. Hecht stated it clearly: In industrial farming, animals are completely deprived of natural self-medication. No free-range, no mineral soil, no zeolite. Instead: antibiotics.
But antibiotics cannot replace what zeolite achieves. On the contrary – their mass use has triggered a global crisis. As early as 2011, the WHO warned in a comprehensive report: antibiotic-resistant germs have reached a scale where simple infections can once again become life-threatening. In Europe, an estimated 25,000 people die every year from antibiotic-resistant pathogens.
And a major driver of this crisis? The excessive use of antibiotics in livestock farming.
What happens when animals get zeolite?
In his article, Prof. Hecht presented an impressive collection of scientific studies. Here are the most important results – categorized by animal species:
🐄 Cattle & dairy cows
Studies from several countries show: If natural clinoptilolite zeolite is given regularly as a feed additive, milk volume and quality (higher protein, fat, and mineral content) improve demonstrably. Calves grow faster, get sick less often, and wean earlier. Fattening bulls show a better mineral status and higher-quality meat protein.
In the digestive tract, zeolite acts like a molecular sieve: it binds pollutants, free radicals, and excess acids – while simultaneously releasing important minerals such as calcium, magnesium, and potassium.
As bedding in cubicles, zeolite keeps the surface dry, reduces ammonia, and protects against digital dermatitis and hoof problems. As a slurry additive, zeolite binds nitrogen (NH₃/NH₄) and prevents its outgassing – the slurry becomes more valuable, and the soil benefits.
🐖 Pigs
Breeding sows that received zeolite showed larger litters, lower piglet mortality, better bone structure, and less aggression. Fattening pigs grew faster, had better blood and tissue values, and higher-quality meat composition.
Particularly impressive: when Croatian zeolite producer Tihomir Lelas delivered zeolite directly into pig pens, the animals immediately rushed to it and ate it greedily. Their instinct knew what their body needed. As a result, the herd's health improved rapidly – and piglet mortality dropped significantly.
🐑 Sheep
Studies, primarily from Australia, prove: zeolite and bentonite improve animal growth and measurably increase wool production. The animals' mineral status also shows demonstrable improvement.
Zeolite also protects against mold toxins (aflatoxins)
An often underestimated risk in livestock farming: aflatoxins – fungal toxins that can occur in contaminated feed, corn, hay, or straw. They damage the liver, weaken the immune system, and can be carcinogenic. Zeolite and bentonite can adsorb – i.e., bind and neutralize – these mycotoxins in the digestive tract. This has been proven in numerous studies for cattle, pigs, and poultry.
Clinoptilolite: Officially approved by EFSA
This is not secret knowledge. In scientific opinions (2012 and 2013), the European Food Safety Authority (EFSA) confirmed the safety and efficacy of both bentonite and clinoptilolite zeolite of natural origin for all animal species. Clinoptilolite is approved as a feed additive across the EU under the identification number 1g568. The expert opinions are clear: these minerals are non-toxic, have no undesirable side effects, and are environmentally friendly.
What this means for your farm
Prof. Hecht summarized it clearly: zeolite is not a panacea and not a replacement for natural animal husbandry. But it is a first important step – away from antibiotics, towards healthier animals and higher-quality products.
The natural cycle works: healthier animals → fewer antibiotics → higher-quality meat and healthier milk → slurry that nourishes the soil instead of polluting it → better harvest → healthier nutrition.
STEINKRAFT zeolite is made exactly for this. Our natural clinoptilolite zeolite is processed using the unique Air2Air Activation Technology grinding process – for maximum effective surface area and optimal bioavailability.
Our products for livestock farming
👉 TIERKRAFT Zeolite – feed additive for cattle, pigs, sheep
👉 STALLKRAFT Bedding – with zeolite, lime, and organic herbs
👉 GÜLLEKRAFT N-FIX – for slurry enhancement and NH₃ binding
👉 All livestock farming products at a glance
Read more
- Zeolite – the all-rounder in cattle farming
- NH₃ binding in slurry: Concrete recommendations for action
- 5 applications of zeolite in agriculture – field report
Source reference
This article is based on the scientific specialist article: Prof. Dr. Dr. med. Karl Hecht: Ecologically clean food products – livestock farming without antibiotics. Ensuring zoopharmacognosy through natural zeolite and montmorillonite. OM & Ernährung 2015, No. 152, pp. F22–F34.
Prof. Hecht sent us this article as a PDF, with the pleasure of seeing it posted on our site to share this knowledge with many people.
