If you compare Shilajit products online, you will quickly encounter one of the industry’s favorite numbers: fulvic acid percentage.
One product may advertise 20%. Another says 50%. Another claims 70%, 80%, or even more. The natural conclusion is that the biggest number must represent the strongest, purest or most authentic Shilajit.
That conclusion is too simple.
Quick answer: Shilajit and fulvic acid are not the same thing. Fulvic acid is a naturally occurring fraction within the broader humic material found in Shilajit. Shilajit itself is a chemically complex natural substance containing humic substances, other organic compounds and naturally occurring elements. A higher reported fulvic-acid percentage tells you what a particular analytical method measured under particular conditions. By itself, it does not prove that one Shilajit is more authentic, safer, more mineral-rich or higher quality than another.
The most important question is therefore not simply:
“How much fulvic acid does it have?”
It is:
“What exactly was measured, how was it measured, what material was tested, and on what reporting basis?”
This guide explains why.
What Is Shilajit?
Shilajit is a naturally occurring dark, resinous material associated with mountain regions across parts of Central and South Asia. Scientific literature describes it as a chemically complex material containing humic substances, organic compounds and mineral elements, with composition that can vary by geographic source and processing.
A 2023 comprehensive review of Shilajit chemistry noted that its full chemical composition is still not known with certainty and that materials from different regions can differ substantially. That complexity is important because it means Shilajit should not be reduced to a single constituent or percentage. You can read the review in PubMed.
In other words, Shilajit is the whole natural matrix. Fulvic acid is one part of that matrix.
This distinction is similar to the difference between coffee and caffeine. Caffeine is an important constituent of coffee, but measuring caffeine alone does not tell you everything about the coffee’s origin, composition, processing or quality.
What Is Fulvic Acid?
“Fulvic acid” sounds like the name of one specific chemical molecule. In reality, the term refers to a complex fraction of naturally occurring humic material.
The International Union of Pure and Applied Chemistry (IUPAC) defines fulvic acid by its behavior: it is the humic-substance fraction that remains soluble across the pH range. IUPAC similarly describes humic substances as naturally occurring organic materials with complex and variable composition.
That matters because a laboratory is not simply looking for one unique “fulvic acid molecule” and counting it. Fulvic material is heterogeneous. Different analytical procedures can isolate, define or quantify somewhat different fractions of that complex mixture.
The International Humic Substances Society (IHSS) likewise uses defined extraction and separation procedures when preparing fulvic-acid reference materials. In analytical chemistry, how the fraction is isolated is part of what defines what is being measured.
Shilajit vs. Fulvic Acid: The Key Difference
Fulvic acid is therefore relevant to Shilajit, but Shilajit is not simply concentrated fulvic acid.
Why Fulvic Acid Percentages Cannot Always Be Compared Apples to Apples
This is the part of the conversation that is often missing from product labels.
Two brands can publish two very different fulvic-acid percentages without necessarily measuring exactly the same analytical fraction in exactly the same way.
A major reason is that fulvic acid is analytically complex.
A 2026 paper in the Journal of Chromatography A studied raw Shilajit, extracts and resin using multiple analytical techniques. The researchers used HPLC for specific identifiable compounds, but quantified total fulvic acid by gravimetric analysis. They explained that fulvic acid is a complex mixture of low-molecular-weight organic acids with highly variable composition and does not provide the kind of single, well-defined chromatographic peak expected from one discrete compound. The study is indexed on PubMed.
This is why the phrase “70% fulvic acid” is incomplete information unless the testing method and reporting basis are also provided.
Different methods can answer different analytical questions
Depending on the laboratory and protocol, fulvic material may be evaluated using approaches involving:
fractionation followed by gravimetric measurement;
acid-base or quantitative titration;
spectrophotometric or UV-visible methods;
chromatographic methods used for specific markers or fractions;
total organic carbon measurements combined with separation procedures; or
standardized humic-substance extraction and isolation protocols.
These methods are not automatically interchangeable.
The practical takeaway is simple: a percentage without the method is difficult to interpret, and percentages generated by different methods should not automatically be ranked against one another.
What About ISO 19822?
You may also see Shilajit sellers reference ISO 19822 when discussing fulvic acid.
ISO 19822:2018 is a real international analytical standard. It specifies a procedure for determining humic acid and hydrophobic fulvic acid concentrations in certain materials.
However, there is an important detail consumers should understand: ISO describes ISO 19822 as a standard for fertilizers, soil amendments and geological deposits. It was not written specifically as a Shilajit dietary-supplement standard.
That does not make the method irrelevant to geological humic materials. It does mean the result should be described accurately.
If a company uses an ISO 19822-type method, useful questions include:
Was the finished Shilajit resin tested, or a raw material/extract?
Was the result reported as hydrophobic fulvic acid?
Was it calculated on an as-is, dry-weight or ash-free basis?
Is the method stated on the laboratory report?
Does the result apply to the current batch?
These details matter much more than simply putting “ISO” next to a large percentage.
Why Reporting Basis Matters: As-Is, Dry Basis and Ash-Free Basis
Even when laboratories use a serious fractionation method, the denominator can change the percentage.
A well-known standardized method published in the Journal of AOAC International isolates humic and fulvic fractions and reports them gravimetrically on an ash-free basis. The method was adapted from IHSS procedures and was developed for humic ores and commercial humic products. You can review the paper through PubMed.
Why does that matter?
A result calculated after removing water or ash is not numerically identical to a percentage calculated against the complete resin exactly as sold in the jar.
So before comparing “20%” with “70%,” ask whether the two numbers even use the same denominator.
Does Higher Fulvic Acid Mean Better Shilajit?
Not by itself.
If two comparable finished products are tested using the same validated analytical procedure, the same sample preparation and the same reporting basis, the higher result means that method measured a larger amount of the defined fulvic fraction.
But that still does not establish everything consumers usually mean by “better.”
A fulvic-acid percentage alone cannot tell you:
where the raw Shilajit came from;
whether the finished product is actually pure resin or a formulated extract;
how the material was purified;
how it was dried or concentrated;
whether lead, arsenic, cadmium, mercury, thallium or other elements were measured;
whether microbial testing was performed;
what other organic constituents are present;
whether the result belongs to the current batch; or
whether one product will produce a better health outcome than another.
That is why we do not believe Shilajit quality should be reduced to a contest over one percentage.
What Do 60%, 70% or 80% Fulvic Acid Claims Actually Tell You?
They tell you that a company is reporting a high fulvic-acid value.
Before drawing any further conclusion, ask for context.
Specifically:
What analytical method produced the number?
Was the finished consumer product tested?
Was the result measured as-is, on a dry basis or on an ash-free basis?
Does the result refer to fulvic acid, hydrophobic fulvic acid, a full fulvic fraction or another analytical definition?
Is the report tied to a specific batch?
A high number is not automatically fraudulent. A lower number is not automatically more authentic. The method determines what the number means.
That is a much more useful standard than assuming every laboratory percentage is measuring exactly the same thing.
Can Fulvic Acid Be Added to a Shilajit Product?
Fulvic-acid ingredients also exist independently of Shilajit and are used in other product categories. That means consumers should distinguish between:
naturally occurring fulvic fractions measured within a whole Shilajit resin;
standardized Shilajit extracts;
Shilajit formulations combined with other ingredients; and
separate fulvic-acid products.
The ingredient panel matters.
If you are buying a product specifically because you want traditional Shilajit resin, check whether the label lists only Shilajit or whether other extracts, powders, acids, sweeteners, gums or functional ingredients have been added.
For a broader authenticity checklist, read our guide on how to tell if Shilajit is real.
Fulvic Acid Is Useful Information, but It Is Not a Complete Quality Score
There is a tendency in the supplement market to turn complicated natural materials into one easy marketing number.
For Shilajit, that number has become fulvic acid.
But a whole natural material should be evaluated as a whole.
We believe a stronger quality assessment asks:
Origin: Can the company identify where its Shilajit comes from?
Traceability: Does it understand its own sourcing and production chain?
Processing: How is raw material purified and converted into finished resin?
Ingredients: Is it pure resin or a standardized/formulated product?
Elemental testing: Are actual concentrations reported rather than only a “lab tested” badge?
Method transparency: When a fulvic-acid percentage is published, does the company disclose how it was measured?
Batch relevance: Can the laboratory result be connected to the product being sold?
For a broader buying guide, see how to choose the best Shilajit resin.
Our Approach at Sulaiman Aftabi
Sulaiman Aftabi has worked with Shilajit from Gilgit-Baltistan for three generations, dating back to 1970.
Our approach is not to standardize the product around the largest possible fulvic-acid number. We produce traditional resin using water extraction, repeated filtration and slow sun-drying rather than turning the material into an isolated fulvic product.
That process is explained in more detail in our guide to sun-dried vs. high-heat Shilajit.
We also believe laboratory testing should answer specific questions rather than function as a marketing badge. Our testing program includes quantitative elemental analysis of the finished resin, including lead, arsenic, cadmium, mercury and expanded testing for thallium and aluminum.
You can review our current Shilajit laboratory testing and our detailed article explaining thallium and aluminum in Shilajit.
When we publish a fulvic-acid result, we believe the percentage should be presented with the analytical method, the sample tested and the reporting basis whenever those details are available.
Because a number without context can look precise while still telling the consumer very little.
How to Read a Fulvic Acid Claim Before Buying Shilajit
When you encounter a large percentage on a label or product page, use this checklist:
1. Find the method
If the method is missing, you do not know exactly how the number was produced.
2. Check what was tested
A raw ore, purified extract, dried powder and finished resin are not necessarily equivalent samples.
3. Check the reporting basis
Look for terms such as “as-is,” “dry basis,” “ash-free basis” or “hydrophobic fulvic acid.”
4. Check the batch
A report from an old or unrelated batch is less informative about the jar being sold today.
5. Look beyond fulvic acid
Review origin, ingredients, processing, elemental testing and the company’s ability to answer detailed questions about its own product.
A percentage can be useful evidence.
It should not replace the rest of the evidence.
Frequently Asked Questions About Shilajit and Fulvic Acid
Is Shilajit the same as fulvic acid?
No. Fulvic acid is a fraction within the broader humic material found in Shilajit. Shilajit is a more complex natural material containing humic substances, other organic compounds and naturally occurring elements.
Does Shilajit naturally contain fulvic acid?
Yes. Scientific literature consistently identifies fulvic material as one of the important humic fractions present in Shilajit. The amount reported, however, depends on the sample and the analytical method used.
What percentage of fulvic acid should Shilajit contain?
There is no single percentage that can be applied to every authentic Shilajit product regardless of geography, processing, sample type and analytical method. A percentage is most meaningful when the laboratory method and reporting basis are disclosed.
Is 70% fulvic acid better than 20%?
Not necessarily. If those values were generated using different methods or reporting bases, they may not be directly comparable. Even when two values are analytically comparable, fulvic-acid concentration alone does not establish overall authenticity, safety, origin, mineral composition or processing quality.
Why do different labs report different fulvic-acid percentages?
Fulvic acid is a heterogeneous humic fraction rather than one simple molecule. Laboratories may use different extraction, separation and quantification procedures, and they may report results on different bases. Method details are therefore essential when interpreting the number.
Is ISO 19822 a Shilajit-specific test?
No. ISO 19822:2018 is an international method for determining humic acid and hydrophobic fulvic acid in fertilizer materials, soil amendments and geological deposits. It can provide useful analytical context for humic geological materials, but it was not written specifically as a dietary-supplement standard for Shilajit.
Can a high fulvic-acid percentage prove Shilajit is authentic?
No. It can tell you something about the fulvic fraction measured by a particular method. Authenticity requires a broader assessment that includes source, ingredients, processing, traceability and laboratory testing.
Can fulvic acid be added to Shilajit?
Fulvic-acid ingredients are sold independently and can be used in formulated products. Consumers looking for pure Shilajit resin should therefore read the ingredient panel and understand whether they are purchasing whole resin, an extract or a multi-ingredient formulation.
What should I look for instead of the highest fulvic-acid number?
Look for a traceable source, transparent processing, a clear ingredient list, method-specific testing, quantitative elemental results and laboratory reports that can be connected to the finished product and current batch.
The Bottom Line
Fulvic acid matters.
But the biggest fulvic-acid percentage does not automatically identify the best Shilajit.
Shilajit is a complex natural material. Fulvic acid is one part of that material, and measuring it is more complicated than reading one number from a label.
When comparing products, ask four questions:
What was tested?
How was it tested?
How was the percentage calculated?
What does the rest of the evidence show?
A credible Shilajit product should be able to withstand more than a percentage comparison.
Its origin, processing, ingredients and laboratory results should tell the same story.
Scientific references used in this article: