Azomite

AZOMITE: A Comprehensive Encyclopedic Reference

1. Identity, Nomenclature, and Natural Source

Trade name and acronym: AZOMITE® (pronounced ā-zō-mite) is an acronym created and registered as a trademark by its founder, Rollin Anderson, for the "A to Z Of Minerals Including Trace Elements."

Chemical classification: Chemically, AZOMITE® is a hydrated sodium calcium aluminosilicate (HSCAS) containing other minerals and trace elements which the National Research Council recognizes to be essential. HSCAS is listed in the U.S. Code of Federal Regulations (21 CFR 582.2729) as an anti-caking agent that is generally recognized as safe (GRAS) by the FDA.

Mineralogical classification: Mineralogically, AZOMITE® can be described as a rhyolitic tuff breccia, which is a hard rock formation that formed from the dust of a volcano that erupted an estimated 30 million years ago. AZOMITE® is mined from an ancient volcanic ash deposit in central Utah, USA. Scientists believe that the unique chemical make-up of AZOMITE® was created when an ancient volcano erupted and the ash settled into a seabed. The combination of seawater, fed by hundreds of rivers rich in minerals, and the rare and abundant minerals present in volcanic ash created the AZOMITE® mineral composition unique to its deposit.

Distinction from related materials: AZOMITE® is not a bentonite; bentonite is an absorbent aluminum phyllosilicate. AZOMITE® is a Hydrated Sodium Calcium Aluminosilicate (HSCAS), and does not swell. Similarly, while it is technically a rock dust, it is very different from glacial rock dust products on the market; AZOMITE® is a mineralized, compacted volcanic ash in origin and is volcanic rather than glacial.

Mineral content: In a typical chemical assay, AZOMITE contains more than 70 trace minerals which include many rare earth elements (lanthanides). It has been reported to contain over 70 minerals and trace minerals in measurable amounts, such as Fe, Mg, Mn, Se, Zn, Cu, and rare earth elements (REE), including lanthanides. Typical analysis reports the presence of Lanthanum (La), Cerium (Ce) and Praseodymium (Pr) in AZOMITE® at 644 ppm. Calcium is present in AZOMITE® at about 3.67%. At 6.2 ppm, AZOMITE® is well below the guidelines for allowed lead in natural feed stuffs as established by the FDA and American Association of Feed Control Officials.

Heavy metals and radioactivity: AZOMITE® does contain heavy metals, but in lesser amounts than exist in a typical soil; it is Generally Recognized as Safe (GRAS) by the US Food & Drug Administration (FDA). AZOMITE® is not radioactive and does not have the capacity to emit alpha particles which can harm humans or animals; findings of a gross alpha/beta test report prepared by the ALS Environmental Laboratory Group of Fort Collins, Colorado, reveal that the alpha radiation values present in AZOMITE® are lower than those from a sample taken from the ALS parking lot. The European Union's regulatory upper limit for Dioxin/PCB contamination of a mineral feed additive is 1 TEQ (1 nanogram/kilogram); none of the assayed raw materials in AZOMITE® have reached these limits.

Aluminum bioavailability: The alumina in AZOMITE® is not biologically available; it is bound to the silica and is an "aluminosilicate." Sand, clay, most rock deposits, and soil deposits are primarily aluminosilicates.

2. Forms and Preparations

AZOMITE® is commercially available in several physical forms, each suited to different applications:

• The micronized form is a powder with flour-like consistency, where 90% of particles will pass through a 200-mesh screen; it is ideal for blending in soil or applying directly when planting.
• The field grade mimics a coarse sand, with particle sizes ranging from 1/8 inch to powder for both rapid and longer-term results; it is designed for composting and blending with other products in application.
• A granulated form is also available; it is the same as AZOMITE® Micronized Trace Minerals except that it has been granulated with molasses for easier application with less dust.
• AZOMITE® Micronized Trace Minerals, AZOMITE® Granulated Trace Mineral, and AZOMITE® Micronized Feed Ingredient are listed by the Organic Materials Review Institute (OMRI) for use in organic production.

AZOMITE® is simply mined, crushed, and sold, and is 100% natural in the most basic sense. As the minerals in AZOMITE® are oxides, not bound to carbon, they are technically considered "inorganic." The pH of AZOMITE® is 8.0.

3. Historical and Traditional Use

AZOMITE® (pronounced ā-zō-mite) is an acronym registered as a trademark by its founder, Rollin Anderson, in the early 1940s. Anderson tested and sold crushed AZOMITE® as a feed additive and soil amendment throughout Utah and California, until businessman W. Wesley Emerson took an interest in further development and leased the reserves in 1988.

For over seventy years, crop producers have used AZOMITE® to support plant growth and vitality. The deposit itself, in Sanpete County, Utah, was the exclusive source from which the material was mined and distributed. For Mr. Anderson, AZOMITE started as a 100% naturally-derived feed additive and soil re-mineralizer mined in Sanpete County, Utah. This unique deposit was formed by a natural volcanic eruption where the volcanic ash was deposited into an ancient seabed, which was pushed to the surface by tectonic activity.

It is important to distinguish between the modern commercial use of AZOMITE—which began systematically in the 1940s—and broader, non-AZOMITE-specific traditions of geophagy (earth-eating) or clay consumption in various cultures. The practice of consuming mineral-rich clays and volcanic earth has occurred across diverse populations. However, no documented evidence exists of a specific pre-modern cultural tradition involving the Utah HSCAS deposit now marketed as AZOMITE; the material's use as a formalized product is entirely a 20th-century commercial development.

Although AZOMITE has been used in agriculture for over 70 years, there are limited scientific studies on the use of this product in animal nutrition. Over the last two decades, AZOMITE has been widely used as a mineral and immune booster in the aquatic feed industry as well as in livestock and organic agriculture.

4. Key Constituents and Proposed Mechanisms of Action

4.1 Mineral and Elemental Profile

AZOMITE's broad mineral spectrum is central to its proposed biological activity. In a typical chemical assay, AZOMITE® contains more than 70 trace minerals which include many rare earth elements (lanthanides). Documented elements in typical assay analyses include iron (Fe), magnesium (Mg), manganese (Mn), selenium (Se), zinc (Zn), and copper (Cu), alongside the rare earth elements (REE) lanthanum, cerium, and praseodymium.

4.2 Rare Earth Elements (REEs / Lanthanides)

Rare earth elements may enhance nitrogen fixation by Azotobacter species; they may enhance absorption of ions by root hairs; they may enhance manganese and iron absorption; they may enhance Photosystems I and II efficiencies; they have enhanced abscisic acid production; they have been shown to help plants contend with stress; they may stimulate Mg-ATPase in photosynthesis; they enhance the Hill reaction of photosynthesis; and they have inhibited fungal growth (Cercospora nicotianae).

REE has antibacterial and antiviral activities, influences immunity (including anti-inflammatory), and alters hormone production and enzyme activity. As reviewed by Tariq et al. (2020) in swine and poultry production and previously by Lei and Xueying (1997) in poultry, the use of individual or combinations of specific REE has been reported to improve feed utilization efficiency. However, the results are not uniform and supplements of individual REE can have negative effects on animal performance, which may be related to the over-supplementation and associated toxicity of elevated REE.

4.3 Aluminosilicate Matrix

Previous research indicates that aluminosilicate-based clays can bind dietary toxins, slow gastrointestinal transit time for better digestion, increase intestinal villi surface area, enhance immunity, and decrease ammonia emissions in poultry litter.

Rare earth minerals have been demonstrated to have some antibacterial properties and can stimulate the digestive micro-organism or enzymes and increase the proteolytic activities.

4.4 Trace Minerals as Enzymatic Cofactors

AZOMITE might have beneficial effects on the oxidative system because it is rich in various kinds of trace minerals, including selenium, copper, and manganese, which are key cofactors for important antioxidant enzymes such as glutathione peroxidase.

5. Scientific Evidence by Area of Use

Important caveat: Although AZOMITE has been used in agriculture for over 70 years, there are limited scientific studies on the use of this product in animal nutrition. No randomized controlled human clinical trials of AZOMITE as a dietary supplement have been published in the peer-reviewed literature. AZOMITE Mineral Products, Inc. does not market AZOMITE® for human consumption. All available peer-reviewed evidence pertains to aquaculture and animal feed applications.

5.1 Aquaculture: White Shrimp (Litopenaeus vannamei)

A 2014 peer-reviewed study published in Aquaculture Nutrition (Wiley) investigated the effects of dietary AZOMITE in white shrimp. The study evaluated effects of dietary AZOMITE, described as a natural mineral of volcanic ash, on growth performance, digestive enzyme activities, serum non-specific immunity, and disease resistance of white shrimp. Graded levels of 0.0, 2.0, 4.0, 6.0, and 8.0 g/kg AZOMITE were supplemented in a basal diet to feed shrimps; after 6 weeks' feeding, weight gains of the 2.0 and 4.0 g/kg AZOMITE groups were significantly higher than that of the control group (P < 0.05). Compared with the control group, the activities of stomach protease, hepatopancreas lipase, and serum alkaline phosphatase, lysozyme, and phenoloxidase were significantly increased by the 4.0 g/kg AZOMITE addition (P < 0.05). At the 96th hour after the injection of bacterium (Vibrio alginolyticus), the accumulated mortality of the 4.0 g/kg AZOMITE addition group was 34.6% lower than that of the control group (P < 0.05).

Evidence assessment: This is a controlled animal feeding study. It demonstrates dose-dependent effects on growth and immune markers in a single crustacean species under laboratory conditions. Results cannot be directly extrapolated to humans or other species.

5.2 Aquaculture: Tilapia (Oreochromis niloticus × O. aureus) and Grass Carp (Ctenopharyngodon idellus)

A study by Liu et al. (2009) showed that weight gain was increased by 12.7% and 9.9% by adding 2.5 and 5.0 g/kg AZOMITE in the diet of tilapia. In grass carp and white shrimp, the dietary supplementation of 2.0 g/kg AZOMITE enhanced the growth performance and feed utilization. Dietary supplementation with 2.0 g/kg AZOMITE in grass carp (Ctenopharyngodon idellus) improved the efficiency of feed utilization, activities of intestinal digestive enzymes, and serum non-specific immune function.

5.3 Aquaculture: Largemouth Bass (Micropterus salmoides)

A 2020 study published in a peer-reviewed aquaculture journal examined the effects of dietary AZOMITE on largemouth bass. The appropriate addition of AZOMITE in the diet was found to be beneficial for fish by improving growth performance, feed utilization, non-specific immune function, intestinal morphology, and resistance against Aeromonas hydrophila in largemouth bass, with the proper inclusion level suggested to be 2.0–3.0 g/kg of diet.

A follow-up 2023 study published in Aquaculture Nutrition evaluated the combined supplementation of AZOMITE and citric acid in juvenile largemouth bass. The study investigated the supplemental effects of AZOMITE and citric acid individually or in combination on growth performance, intestinal microbiota, morphology, digestive enzyme activity, serum indexes, and disease resistance of juvenile largemouth bass. Six diets were designed, including a control diet and five additive-supplemented diets with the addition of 4 or 8 g/kg citric acid, 3 g/kg AZOMITE, and their combined addition as 4 g/kg citric acid + 1.5 g/kg AZOMITE and 8 g/kg citric acid + 3 g/kg AZOMITE. Juvenile largemouth bass with an initial body weight of 22.01 ± 0.09 g were fed the six diets for 56 days.

However, it has also been noted that high AZOMITE inclusion levels disrupted intestinal microflora balance in largemouth bass despite reducing Aeromonas levels, illustrating the context-dependence of mineral effects and suggesting that outcomes observed under optimal laboratory conditions may not reliably predict those in production settings where multiple stressors operate simultaneously.

5.4 Aquaculture: Koi Carp (Cyprinus carpio koi)

Koi carp fingerlings were divided into four groups and each group was fed with AZOMITE-supplemented diet with three graded levels (2.0 g/kg, 4.0 g/kg, and 6.0 g/kg) along with a control group. After 8 weeks of feeding trial, the results indicated that koi fed diets supplemented with 4.0 g/kg AZOMITE had the highest final weight, specific growth rate, total phagocytic activity, phagocytic index, NBT assay, lysozyme assay, total protein, and immunoglobulin levels compared with the control group. The results showed that the dietary level of 4.0 g/kg AZOMITE can improve the growth performance and immune response of koi carp fingerlings.

5.5 Poultry: Broilers — Growth Performance and Bone Mineralization

A study published in Animal Biotechnology (PubMed PMID 33938381, Pirzado et al., 2021) investigated the effect of AZOMITE on broiler growth performance, immune function, and bone strength. This study was examined to investigate the effect of AZOMITE (AZO) on the growth performance, immune function, and bone mineralization of broiler chickens. Total protein, globulin, IgA, and IgG levels were significantly (P < 0.05) increased with AZOMITE-supplemented treatments; tibia diameter and tibia breaking strength were significantly (P < 0.05) increased in AZO-0.25% and AZO-0.50% treatment groups.

Pirzado et al. (2020) found that AZOMITE in conjunction with a low-energy diet exhibited positive effects on growth performance, bone parameters, and nutrient digestibility in broilers; supplementation of AZOMITE at 0.25 and 0.50% in the diet of broilers improved growth performance, immune functions, and tibia breaking strength.

A 2021 study published in Italian Journal of Animal Science (Taylor & Francis / tandfonline) investigating 180 day-old broiler chicks confirmed similar findings. The study investigated the effect of AZOMITE on the growth performance, nutrient utilization, and bone mineralization of broilers fed a low-protein diet; dietary AZOMITE improved the tibia breaking strength and bone mineralization in broiler chickens.

Using aluminosilicates (AZOMITE) at a level of 0.25% compound feed for broiler chickens, one study showed that the addition of this natural mineral increased bone mineralization and the digestibility of calcium and phosphorus from the feed, which resulted in higher bone-breaking strength.

5.6 Poultry: Laying Hens and Broiler Breeders — Egg Production

A study published in Poultry Science (2021, Juzaitis-Boelter et al., PMC8131723) evaluated AZOMITE across three types of poultry simultaneously. Laying hens were fed a control diet or a diet supplemented with 0.25% AZOMITE from 54 through 98 weeks of age, with the hens fed a standard molting diet or this diet supplemented with 0.25% AZOMITE from 71 to 72 weeks of age; broiler breeder hens were fed a control diet or this diet supplemented with 0.25% AZOMITE from the onset of photostimulation at 21 weeks of age through 65 weeks of age. All three dietary inclusion rates of AZOMITE improved (P < 0.05) the feed-to-body-weight-gain ratio in broilers fed these diets relative to broilers fed the control diet. In laying hens, total marketable eggs, and in broiler breeder hens, total settable eggs were increased (P < 0.05) with the dietary inclusion of AZOMITE by 8 eggs per hen. The inclusion of dietary AZOMITE also improved apparent Ca and P digestibility in broilers and tibia ash content in laying hens. The results indicate the dietary inclusion of AZOMITE in poultry diets improves bird performance.

However, the same study noted that based on villi height and crypt depth measurements in laying hens, duodenum surface area was not increased by dietary AZOMITE supplementation; the serum concentration of IgY was also unaffected in laying hens after being fed a diet supplemented with AZOMITE for 16 weeks.

5.7 Aquaculture Pond Application: A Null Finding

A 2020 study published in the North American Journal of Aquaculture (Mischke 2020) specifically tested AZOMITE's effectiveness as a pond water treatment. The study's title indicates it found that AZOMITE application did not positively influence water quality, phytoplankton populations, or zooplankton populations when preparing Mississippi channel catfish nursery ponds for stocking — representing a null or negative result relevant to one of the product's claimed pond applications.

5.8 Crop and Plant Applications: Field and Greenhouse Evidence

Typical analysis reports the presence of lanthanum, cerium, and praseodymium in AZOMITE® at 644 ppm; increases in crop yields of up to 15% in some plant species have been confirmed in greenhouse and field conditions, particularly when moisture was limiting. AZOMITE® tests have reported positive results in many plant species including wine grapes, table grapes, sugarcane, potatoes, rice, watermelon, tomatoes, melons, cantaloupes, onion, garlic, papaya, lemons, oranges, cocoa, coffee, mango, oaks, pines, peaches, chilies, berries, eggplant, tobacco, ornamentals, wheat, corn, and many others.

Evidence assessment: Plant-related studies vary widely in methodological rigor; many rely on field trials conducted or commissioned by AZOMITE Mineral Products, Inc. or its distributors, rather than independent peer-reviewed trials. The results should be interpreted with caution.

6. Body Systems and Health Areas Associated with AZOMITE (Animal Evidence Only)

All associations below are based on animal (aquaculture and poultry) research only. No human clinical data exist.

• Skeletal system / bone health: Dietary AZOMITE improved the tibia breaking strength and bone mineralization in broiler chickens. Multiple broiler studies have demonstrated improved calcium and phosphorus digestibility.
• Immune system: In white shrimp, the activities of serum alkaline phosphatase, lysozyme, and phenoloxidase were significantly increased by the 4.0 g/kg AZOMITE addition (P < 0.05). Broiler studies showed elevated IgA and IgG levels in supplemented groups.
• Gastrointestinal system: Aluminosilicate-based clays can bind dietary toxins, slow gastrointestinal transit time for better digestion, and increase intestinal villi surface area.
• Growth and metabolism: Multiple aquaculture and poultry studies document improvements in weight gain, feed conversion ratio, and specific growth rate at dosages of 2–4 g/kg feed.
• Antioxidant capacity: AZOMITE might have beneficial effects on the oxidative system because it is rich in various kinds of trace minerals, including selenium, copper, and manganese, which are key cofactors for important antioxidant enzymes such as glutathione peroxidase.
• Reproductive performance (hens): In laying hens, total marketable eggs, and in broiler breeder hens, total settable eggs, were increased (P < 0.05) with the dietary inclusion of AZOMITE by 8 eggs per hen.

7. Dosage Forms and Dosages Reported in Studies

Dosage information below is drawn exclusively from published animal studies. No human dosage data exist in the peer-reviewed literature.

• White shrimp (aquaculture feed): Graded levels of 0.0, 2.0, 4.0, 6.0, and 8.0 g/kg AZOMITE were evaluated; the 2.0 and 4.0 g/kg levels were most effective.
• Largemouth bass (aquaculture feed): The proper inclusion of AZOMITE is suggested to be 2.0–3.0 g/kg of diet.
• Largemouth bass combined study (2023): Diets were formulated including 3 g/kg AZOMITE alone, or combined additions of 4 g/kg citric acid + 1.5 g/kg AZOMITE and 8 g/kg citric acid + 3 g/kg AZOMITE.
• Koi carp: Graded levels of 2.0, 4.0, and 6.0 g/kg were evaluated over 8 weeks; 4.0 g/kg yielded the highest specific growth rate and immune response.
• Broiler chickens (Pirzado et al., 2020): A total of 180 one-day-old Arbor Acres broiler chicks were used; treatments included a control basal diet, a low-metabolizable-energy diet (LME), and LME supplemented with 0.25% AZOMITE (AZO-0.25).
• Broiler chickens (Pirzado et al., 2021): Supplementation of AZOMITE at 0.25 and 0.50% in the diet of broilers improved growth performance, immune functions, and tibia breaking strength.
• Laying hens and broiler breeders (Juzaitis-Boelter et al., 2021): Laying hens were fed 0.25% AZOMITE supplementation from 54 through 98 weeks of age.
• Aquaculture general (university studies): Several university studies have reported significant improvements when AZOMITE® was added directly to the feed at 0.3% to 1% of the total feed mix.

For agricultural (soil amendment) use, the manufacturer recommends application rates that differ from animal feed rates and are not applicable to supplemental contexts.

8. Safety Considerations

8.1 Regulatory Status

AZOMITE® is a complex mineral ore chemically identified as a hydrated sodium calcium aluminosilicate (HSCAS), and HSCAS is listed in the U.S. Code of Federal Regulations (21 CFR 582.2729) as an anti-caking agent that is generally recognized as safe (GRAS) by the FDA. This GRAS designation applies to HSCAS in the context of animal feed, not as a specifically evaluated human dietary supplement.

AZOMITE Mineral Products does not market AZOMITE® for human consumption.

8.2 Heavy Metal Content

Of much greater importance than the amounts of heavy metals in AZOMITE® are the amounts already present in the soil, in the manufactured fertilizers/pesticides used, and in the irrigation water. In well over seventy years of AZOMITE® being used to grow crops, there has never been a single instance of any toxicity arising from the heavy metals in AZOMITE®. The material contains detectable but trace amounts of arsenic, cadmium, lead, and mercury inherent to its volcanic geological origin. The FDA and American Association of Feed Control Officials establish strict guidelines for the amount of various natural contaminants that show up in all types of feed ingredients; at 6.2 ppm, AZOMITE® is well below the guidelines for allowed lead in natural feed stuffs.

8.3 Aluminum Content

The alumina in AZOMITE® is not biologically available; it is bound to the silica and is an "aluminosilicate." The significance of this statement for human oral ingestion has not been evaluated in peer-reviewed human studies.

8.4 Dose-Dependent Effects and Upper Limits in Animal Studies

The use of individual or combinations of specific REE has been reported to improve feed utilization efficiency; however, the results are not uniform, and supplements of individual REE can have negative effects on animal performance which may be related to the over-supplementation and associated toxicity of elevated REE. High AZOMITE inclusion levels disrupted intestinal microflora balance in largemouth bass despite reducing Aeromonas levels, illustrating that outcomes observed under optimal laboratory conditions may not reliably predict those in production settings.

8.5 No Human Clinical Safety Data

There are no published peer-reviewed human clinical trials evaluating the safety, pharmacokinetics, or efficacy of AZOMITE as a human dietary supplement. The material has not been evaluated by the NIH Office of Dietary Supplements, NCCIH, EFSA, EMA, or any equivalent regulatory or evidence-synthesis body as a human supplement. Any use in human nutrition is off-label relative to the manufacturer's stated intentions and is unsupported by clinical evidence.

8.6 Abrasivity

The Miller Abrasion Index Number for AZOMITE® is 95, comparable to quartzite (99) and sand (108), making it considerably more abrasive than gypsum (41) or limestone. This physical property is relevant to any context involving oral ingestion.

8.7 PCB and Dioxin Limits

The European Union's regulatory upper limit for Dioxin/PCB contamination of a mineral feed additive is 1 TEQ (1 nanogram/kilogram); none of the assayed raw materials in AZOMITE® have reached these limits.

9. Summary of Evidence Strength

The following characterizes the overall state of the scientific evidence for AZOMITE:

• Human clinical evidence: None. No randomized controlled trials, observational studies, or systematic reviews evaluating AZOMITE in human subjects have been published.
• Animal / aquaculture evidence (growth performance): Moderate; multiple peer-reviewed trials across several species (shrimp, tilapia, grass carp, largemouth bass, koi carp, broiler chickens) consistently demonstrate improvements in weight gain and feed conversion ratio at dosages of approximately 2–4 g/kg feed. Studies are predominantly from Asian research institutions and are relatively small-scale laboratory or controlled feeding trials.
• Animal / poultry evidence (bone mineralization): Moderate; several independent broiler studies show improved Ca and P digestibility and tibia breaking strength.
• Animal / poultry evidence (egg production): Moderate for the specific Juzaitis-Boelter et al. (2021) Poultry Science study, which is published in a high-quality, peer-reviewed journal.
• Immune function (animal): Preliminary; improvements in non-specific immunity markers are reported across multiple species, but the clinical significance and mechanisms remain incompletely characterized.
• Crop and agricultural yield: Preliminary and partially industry-sponsored; some independent greenhouse studies show positive yield effects, but the body of rigorously peer-reviewed, independent research remains limited.
• All reviewed studies were conducted under controlled laboratory conditions that do not adequately simulate the complexity of commercial aquaculture environments, including variable stocking densities, fluctuating water temperature and quality, co-infections, and feed composition heterogeneity.

References

• AZOMITE Mineral Products, Inc. — Frequently Asked Questions
• AZOMITE Mineral Products, Inc. — About AZOMITE
• AZOMITE International — About AZOMITE®
• AZOMITE International — Frequently Asked Questions
• AZOMITE International — Rare Earth Elements
• Juzaitis-Boelter et al. (2021). Dietary inclusion of AZOMITE improves feed efficiency in broilers and egg production in laying and broiler breeder hens. Poultry Science. PMC8131723.
• Pirzado SA et al. (2021). Effect of Azomite on growth performance, immune function and tibia breaking strength of broiler chickens during starter period. Animal Biotechnology. PubMed 33938381.
• Pirzado SA et al. (2021). Effect of azomite on growth performance, nutrient utilization, serum biochemical index and bone mineralization of broilers fed low protein diet. Italian Journal of Animal Science. Taylor & Francis.
• Tan C-G et al. (2014). Effects of supplemental Azomite in diets on growth, immune function and disease resistance of white shrimp (Litopenaeus vannamei). Aquaculture Nutrition. Wiley.
• Xu et al. (2020). Dietary Azomite, a natural trace mineral complex, improved the growth, immunity response, intestine health and resistance against bacterial infection in largemouth bass (Micropterus salmoides). ScienceDirect.
• Zhang et al. (2023). The Combined Supplementation of AZOMITE and Citric Acid Promoted the Growth, Intestinal Health, Antioxidant, and Resistance against Aeromonas hydrophila for Largemouth Bass, Micropterus salmoides. Aquaculture Nutrition. PMC10597733.
• Musthafa MS et al. (2016). Protective efficacy of Azomite enriched diet in Oreochromis mossambicus against Aeromonas hydrophila. Aquaculture. ScienceDirect.
• Mischke (2020). Azomite Application Does Not Positively Influence Water Quality, Phytoplankton Populations, or Zooplankton Populations When Preparing Mississippi Channel Catfish Nursery Ponds for Stocking. North American Journal of Aquaculture. Wiley.
• Liu MZ et al. (2011). Effects of Azomite on growth performance, intestinal digestive enzyme activities and serum nonspecific immune of grass carp (Ctenopharyngodon idellus). ResearchGate.
• Mineral-microbiota interactions in aquaculture: implications for fish gut health and nutrition. Veterinary Research Communications. Springer (2026).
• Massam LLC — AZOMITE FAQs and Information
• U.S. Code of Federal Regulations, 21 CFR Part 582 — Substances Generally Recognized as Safe. Electronic Code of Federal Regulations (eCFR).
• U.S. Food and Drug Administration — Generally Recognized as Safe (GRAS)