- Fulvic acid is a method-defined fraction, not one compound.
- Different methods give different percentages for the same resin.
- A percentage needs a named method, laboratory and batch.
- No evidence links higher percentages to better outcomes.
Why the percentage is so prominent
Fulvic acid is one of shilajit’s main reported components,[1] and a percentage is easy to print and compare. That makes it an attractive marketing number. The problem is that the number depends heavily on how it was measured, and labels rarely say. The chemistry is explained in fulvic acid in shilajit; this article checks the claim itself.
Why methods give different results
Humic substances are separated into fractions by solubility, and each laboratory’s procedure for doing that can differ in reagents, steps and how the final fraction is quantified. A method that captures more material in the “fulvic” fraction reports a higher percentage. Neither result is necessarily wrong, but the two aren’t comparable. See fulvic acid testing: why percentages don’t compare and humic substances.
| What the label shows | What you can conclude |
|---|---|
| “60% fulvic acid”, no method | Very little; it can’t be compared |
| A percentage with a named method | Comparable with other products using the same method |
| A percentage on a batch COA | Applies to that batch, by that method |
| “Up to 85% fulvic acid” | The maximum, not the typical value |
Basis matters too
A percentage can be expressed on the resin as sold or on a dry-weight basis, which removes moisture from the calculation. A dry-weight figure will be higher for the same material. Moisture alone can shift a figure noticeably; see the worked example in processing and composition. A clear claim says which basis it uses.
Is a higher percentage better?
No study has shown that shilajit with a higher fulvic acid percentage produces better results in people. The human trials used specific preparations rather than comparing percentages,[2][1] and claims about fulvic acid’s effects rest largely on laboratory work.[3] That question is covered in depth in can more fulvic acid mean better shilajit?
Red flags in percentage claims
- No method statedThe number can’t be compared with anything.
- “Up to” figuresAdvertising the best result, not the typical one.
- Very high round numbersAsk for the batch COA that shows them.
- Percentage instead of contaminant resultsComposition is never a substitute for safety testing.
Our verdict
A fulvic acid percentage can be accurate for the method used. Without the method, batch and basis, it can’t be compared, and a higher figure isn’t evidence of a better product.
The bottom line
Fulvic acid percentages are the most quoted and least comparable figures on shilajit labels. A percentage can be accurate for its method, but without the method, basis and batch, it can’t be compared, and no evidence shows a higher figure means a better product. Put contaminant results and documentation first, and treat fulvic acid as useful context.
What an honest fulvic acid claim looks like
A trustworthy claim names the method, states whether the figure is on an “as sold” or dry-weight basis, gives a typical value rather than “up to”, and links the batch report. For example: “fulvic acid 32% (as sold, method stated on COA, batch 2409)”. That level of detail lets you compare products fairly.
Comparing two products’ fulvic acid claims
- Find both methodsIf either is missing, the comparison isn’t possible.
- Check the basisAs sold or dry weight.
- Check the batchesEach figure should relate to the batch on sale.
- Then compare contaminantsThose matter more than the percentage.
If the methods differ, treat the two figures as unrelated numbers rather than a ranking.
Why “as sold” figures are more useful to buyers
A dry-weight figure is useful to chemists, but the resin you take includes its moisture. An “as sold” figure describes what is actually in each gram you scoop, which makes it the more practical number for buyers, and it is the basis on which GB metal limits for supplements apply.[4] When a label quotes a dry-weight percentage, expect the “as sold” figure to be lower.
Who measures fulvic acid
Fulvic acid results usually come from a separate composition test rather than the contaminant panel, sometimes run by a different laboratory and on a different date. That’s normal, but check that the composition result relates to the same batch, or at least that its date and sample are stated; see batch-specific vs generic COAs.
Frequently asked questions
What is a good fulvic acid percentage for shilajit?
There is no agreed “good” figure, because results depend on the test method. Compare only figures measured the same way.
Why do brands claim 60% or more fulvic acid?
High figures sell well. Some methods produce higher percentages than others, so ask which method was used.
Is a higher fulvic acid percentage better?
No evidence shows that higher percentages produce better results in people.
What does dry-weight basis mean?
The percentage is calculated after removing moisture, which gives a higher figure than “as sold” for the same resin.
Can fulvic acid percentages be faked?
A figure without a laboratory report can’t be checked. Ask for the batch COA showing the result and method.
Does fulvic acid percentage say anything about safety?
No. Safety depends on contaminants, which need separate testing. See contaminants.
Where do I see a product’s fulvic acid result?
On its batch laboratory report. See how to read a COA.
What does a well-written fulvic acid claim include?
The method, the basis (as sold or dry weight), a typical value and a link to the batch report.
Sources & further reading
Primary research, regulators and standards bodies are cited first. A source being listed here does not mean it supports every claim made by sellers; it supports the specific statement it is attached to.
- Keller JL, Housh TJ, Hill EC, Smith CM, Schmidt RJ, Johnson GO. The effects of Shilajit supplementation on fatigue-induced decreases in muscular strength and serum hydroxyproline levels. Journal of the International Society of Sports Nutrition 16:3, 2019. doi:10.1186/s12970-019-0270-2; PMID 30728074. View source (opens in a new tab) [Randomised controlled trial]
- Pandit S, Biswas S, Jana U, De RK, Mukhopadhyay SC, Biswas TK. Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers. Andrologia 48(5):570–575, 2016. PMID 26395129. View source (opens in a new tab) [Randomised controlled trial]
- Carrasco-Gallardo C, Guzmán L, Maccioni RB. Shilajit: a natural phytocomplex with potential procognitive activity. International Journal of Alzheimer’s Disease 2012:674142, 2012. doi:10.1155/2012/674142; PMID 22482077. View source (opens in a new tab) [Review (preclinical)]
- European Commission (UK version on legislation.gov.uk). Commission Regulation (EC) No 629/2008 amending Regulation (EC) No 1881/2006 setting maximum levels for certain contaminants in foodstuffs. legislation.gov.uk, 2008. View source (opens in a new tab) [UK legislation (retained)]