In recent years there has been growing interest in soil-derived organic substances as putative wellness ingredients. Compounds described as humic substances, most commonly fulvic acid and humic acid, appear in everything from social media posts to supplement labels and traditional remedies. Part of the appeal is their origin. They are natural breakdown products of plant matter and contain arrays of small organic molecules and mineral complexes that might interact with biological systems.¹ 

Because fulvic and humic acids both arise from the decomposition of organic material they are often discussed together, but they differ in important physical and chemical ways. Emerging evidence suggests some of their biological actions observed in laboratories and animal studies may or may not translate to human health effects. However, human data are limited and findings are tentative. Throughout this article I will distinguish hypotheses and lab work from animal studies and early clinical findings, and I will highlight safety, sourcing and regulatory issues that matter for Canadians.² 

Safety first. Fulvic and humic products vary widely in purity. Several commercially available preparations have tested high for heavy metals such as lead, arsenic or cadmium in independent investigations. Pregnant and breastfeeding people should avoid use unless specifically guided by a clinician. Anyone considering these products should consult a healthcare professional before starting them.³ 

This article is intended for readers who are curious, research-minded or cautiously exploring natural wellness categories rather than for individuals seeking treatment for specific medical conditions. 

 What Are Humic Substances? 

Humic substances is an umbrella term used by soil scientists and chemists for a heterogeneous mixture of organic materials formed during the natural decomposition of plant and animal matter. These substances are not a single molecule but rather complex mixtures that vary by source such as peat, soil, sediment, compost and rock deposits and by the biological and chemical processes that produced them. Because their composition varies, so do their physical properties and potential biological effects.⁴ 

Humic substances typically fractionate into categories such as humin, humic acid and fulvic acid according to solubility and molecular size. This is a shorthand used in research and water treatment contexts. The classification is operational. It is based on how the materials behave in solvents and under different pH conditions rather than a simple identity label. The scientific complexity and source variability are important context when people talk about fulvic acid or humic acid in supplements or studies.⁵ 

What Is Humic Acid? 

Humic acid refers to the higher molecular weight fraction of humic substances that is not soluble in water under acidic conditions but dissolves at higher pH. In practical terms, humic acids are generally larger, darker and more complex molecules than fulvic acids. In soil science they are often credited with influencing soil structure, water retention and nutrient availability.⁶ 

From a health perspective, most mechanistic data for humic acids come from in vitro lab experiments, soil and plant studies or animal models. These studies describe interactions with minerals, binding of organic pollutants and modulation of microbes. These mechanistic hints are interesting but cannot be assumed to predict health benefits in people. In other words, humic acid’s role in agriculture and environmental chemistry is better established than its clinical usefulness for humans.⁷ 

What Is Fulvic Acid? 

Fulvic acid is the lower molecular weight and more water soluble fraction of humic substances. Because fulvic acids dissolve in water across a wider pH range and are relatively smaller and more hydrophilic, they have drawn particular attention in biomedical research and supplement markets. Scientists describe fulvic acid as a mixture of many small molecules that can chelate metals, interact with cell membranes in laboratory systems and participate in redox reactions.⁸ 

That solubility is one reason fulvic acid features in experimental studies. It is easier to work with in aqueous biological systems than the larger humic fractions. A number of in vitro and animal studies report antioxidant, anti-inflammatory and metal binding activities for fulvic fractions, and there are some early clinical investigations. Human data remain limited and often small in scale. When reading claims about fulvic acid it is important to differentiate mechanistic or laboratory results from outcomes demonstrated in rigorous human trials.⁹ 

Even when fulvic acid behaves in certain ways in cell or animal studies, these effects do not guarantee similar actions in human physiology. 

Key Differences Between Humic Acid and Fulvic Acid

Also Read: Supergreen Tonik vs. AEON ONE – Which Superfood Powder is Better for Your Health? 

Why These Differences May Matter for Wellness 

Physical characteristics such as size and solubility can influence how a substance behaves biologically. For fulvic acid, smaller size and water solubility mean it can be formulated into oral preparations more readily and can be studied in lab assays that model biological systems. These properties may explain why many early human trials, limited as they are, involve fulvic fractions or carbohydrate derived fulvic preparations.¹⁰ 

Still, the leap from biochemical interaction to meaningful health outcomes in humans is large. For example, metal chelation observed in vitro might be helpful in tightly controlled circumstances or might create unintended effects if it mobilizes metals or micronutrients unpredictably. Antioxidant effects in chemical assays do not automatically translate into clinical benefit. Separating plausible mechanisms from proven therapeutic effects requires well designed human trials, which are currently limited in number and scope.¹¹ 

Fulvic acid has shown promising actions in laboratory and animal studies. These findings should be viewed as early signals rather than confirmed outcomes. Clinical evidence in people is limited. Mechanistic proposals remain hypotheses until replicated in human trials. 

Also Read: How Fulvic Acid Helps Your Body Use Food More Efficiently

What Current Research Suggests 

Here is a balanced, evidence level summary. 

• In vitro experiments (mechanistic). Numerous in vitro studies show fulvic and humic fractions can bind metals, scavenge radicals in chemical assays and influence microbial growth. These studies help generate hypotheses about antioxidant, anti-inflammatory or detoxification related effects but cannot on their own justify clinical claims.¹² 
• Animal models. Research in animals has reported effects such as modulation of gut microbiota, improved markers in inflammatory models and tissue level antioxidant changes after exposure to fulvic preparations. These findings are preliminary and cannot predict human outcomes.¹³ 
• Early clinical findings (small human trials). A few small human trials and phase 1 or phase 2 studies have tested purified carbohydrate derived fulvic acid compounds. Examples include randomized studies exploring topical fulvic preparations for eczema and early safety studies examining oral fulvic products at controlled doses. These studies suggest possible effects in narrow contexts but are limited by small sample size, short duration and use of specific purified formulations that differ from raw materials sold commercially.¹⁴ 
• Toxicology and safety research. Toxicology reviews and early phase safety studies report low acute toxicity at certain doses for some purified fulvic preparations. However, long term human data remain sparse.¹⁵ 

Overall. Preliminary signals justify continued research but not firm conclusions. High quality, large human trials have not yet been conducted. 

Safety, Sourcing and Quality 

This section is intentionally direct. 

Contaminants. Commercial humic and fulvic products, including preparations such as shilajit, have been found in investigations to contain heavy metals, mycotoxins or microbial contaminants depending on source and processing. Regulatory agencies have issued recalls or warnings for specific fulvic or shilajit products due to elevated heavy metals.³ 

Regulatory oversight. Dietary supplements are regulated differently across countries. In Canada, Health Canada oversees natural health products. In the United States the Food and Drug Administration issues alerts when contaminants are detected. Certification, third party testing and compliance with national limits for heavy metals are essential safeguards.¹⁶ 

Limited long term human data. Toxicology reviews aggregating animal and short term human data suggest low acute toxicity for some purified fulvic preparations at studied doses but cannot substitute for long term monitoring.¹⁵ 

Groups requiring caution. Pregnancy, breastfeeding, chronic kidney or liver disease and prescription medications affecting mineral balance are common contexts needing medical guidance.¹⁷ 

Also Read: AEON ONE™ vs AG1® for Women’s Wellness: Which Supports Hormonal Balance and Energy Better? 

Who Might Be Interested 

Researchers and consumers interested in natural compounds may follow ongoing fulvic acid studies. Individuals seeking general wellness support sometimes explore these products. This group typically includes people interested in experimental or emerging ingredients rather than those pursuing clinical treatment for diagnosed conditions. People with specific health concerns should not view fulvic or humic acid as therapy. Evidence of consistent benefit in humans has not been established. 

How Fulvic and Humic Acids Are Used Today 

Dietary supplements and tonics 

Fulvic fractions are sold in powders, liquid concentrates and combined formulas. Marketing claims vary and many rely on hypothetical mechanisms rather than clinical evidence.¹⁷ 

Traditional and ethnobotanical uses 

Substances such as shilajit, a tar like deposit containing humic substances and minerals, are used in Ayurvedic systems. Traditional use does not equal proven safety or efficacy.¹⁸ 

Research applications 

Researchers continue testing purified fulvic preparations in specific clinical contexts such as dermatology. These findings remain early stage.¹⁴ 

Also Read: What Makes Fulvic Acid a Game Changer in Modern Nutrition?

What Is Not Proven 

• No large, randomized controlled trials demonstrate that fulvic acid improves mineral status in humans.  
• No rigorous human study confirms that fulvic acid safely removes heavy metals from the body.  
• There is insufficient long-term safety data for chronic human use.  
• Claims about cognitive, antiviral, or anticancer benefits are based on early in vitro or animal data and are not clinically validated. (evidence: in vitro / animal) 

Frequently Asked Questions

1. Are fulvic acid and humic acid the same? 

No. They are different components of humic substances. Fulvic acid has smaller, more soluble molecules, while humic acid contains larger compounds that behave differently in the body. 

2. Is there strong clinical evidence for their health benefits? 

Evidence remains limited. Most findings come from early laboratory or animal research, with few small human studies. Current evidence is exploratory rather than confirmatory, so benefits should not be assumed. 

3. Are fulvic or humic acid supplements safe for most people? 

Generally considered low risk when purified, but product quality varies. People with medical conditions, children, pregnant individuals, or those on medication should consult a healthcare provider. Safety depends heavily on purity and sourcing rather than the ingredient alone. 

4. Do these acids improve energy or reduce fatigue? 

Not proven. While laboratory studies suggest fulvic acid might affect nutrient transport or redox pathways, there is no strong clinical evidence that it reliably improves energy or reduces fatigue in people. (evidence: human data limited) 

5. Can they support gut health? 

Possibly, based on early animal and laboratory studies suggesting effects on gut integrity or microbes. Human evidence is limited, so potential benefits remain uncertain. 

6. Which is better: fulvic acid or humic acid? 

Neither is definitively ‘better.’ Fulvic acid is more studied for possible transport and bioavailability functions. Humic acid is more common in environmental research. Their potential wellness benefits remain speculative, and choice should depend on interest, goals, and product quality. (evidence: in vitro / animal) 

7. Are fulvic and humic supplements regulated in Canada? 

Yes. They are regulated as Natural Health Products. Consumers should choose items with a Natural Product Number to ensure they meet Health Canada’s purity and safety requirements. 

Conclusion 

Fulvic and humic acids are complex mixtures formed during natural decomposition of organic matter. Fulvic fractions are typically smaller and more water soluble, which helps explain why much early biomedical research focuses on them. In vitro and animal studies suggest hypothetical antioxidant, metal binding and anti-inflammatory mechanisms. A handful of small human studies explore narrow applications, but high quality clinical trials are lacking. 

Safety and quality remain primary concerns. Contamination with heavy metals, variable sourcing and inconsistent regulatory oversight mean that reliance on tested products, transparent suppliers and medical consultation is the safest approach. For Canadians, Health Canada guidance and consumer resources from major medical institutions provide helpful direction. 

Bottom line. Fulvic and humic acids are scientifically interesting but not clinically established. They should be approached with curiosity and caution rather than expectation of proven health outcomes. 

How we verified this article: 

The information in this article was verified using the current public Supplement Facts panels and product pages for AEON ONE™ (TrueAeon.com), and by reviewing available third-party certification listings (e.g., Health Canada) as of November 2025. Pricing and ingredient data reflect what was publicly posted by the brands at the time of review. Because supplement formulations, pricing, and certifications can change, readers should always check the Supplement Facts label and brand website for the most current information prior to purchase. 

References 

¹ Stevenson FJ. Humus Chemistry. Wiley. 
 ² Tan KH. Humic Matter in Soil and the Environment. CRC Press. 
 ³ U.S. FDA. Safety alerts for shilajit and humic derived products. 
 ⁴ Swift RS. Organic matter characterization. Soil Sci. 
 ⁵ Filella M. Humic substances review. Environ Chem Lett. 
 ⁶ Piccolo A. Humic substances in nature. Arch Agron Soil Sci. 
 ⁷ van Rensburg CEJ. Biological properties of humic acid. J Chem. 
 ⁸ Aeschbacher M. Fulvic acid interactions. Environ Sci Technol. 
 ⁹ Winkler J. Fulvic acid and inflammatory conditions. 
 ¹⁰ Gandy JJ et al. Clinical trials of carbohydrate derived fulvic acid. 
 ¹¹ Senesi N. Metal interactions with fulvic substances. 
 ¹² Frontiers in Environmental Chemistry. Fulvic metal binding assays. 
 ¹³ Animal model fulvic antioxidant studies. 
 ¹⁴ CHD FA human safety trials. 
 ¹⁵ Dai C et al. Toxicological assessment of fulvic acid. 
 ¹⁶ Health Canada. Natural organic matter guidelines. 
 ¹⁷ WebMD and Cleveland Clinic consumer guidance on fulvic acid. 
 ¹⁸ Traditional uses of shilajit review.