THE SHORT ANSWER
To compare fulvic acid content in shilajit, check the test method, the sample and what the percentage is calculated from. A higher headline figure can come from a different calculation, even when the amount measured has not changed.
Start by finding out what the laboratory measured and which sample it measured it in.
In this guide4 sections
01
Fulvic acid is a group of substances
The name does not describe one molecule with one formula. Laboratory separation procedures help define the fraction being measured.
The International Humic Substances Society (IHSS) describes methods for isolating reference materials. In its procedures, humic acid is separated by making the solution acidic; further separation and purification recover the fulvic acid fraction. A combined “humic and fulvic acids” result therefore describes something different from a fulvic acid result alone. IHSS does not endorse these procedures as the best extraction methods for every purpose. [S2]
This is why method details matter. Two headline percentages do not become comparable simply because both use the words “fulvic acid.”
02
Find the sample, method and reporting basis
Before comparing results, locate:
- The sample description: concentrated ingredient, resin or finished blend, for example.
- The assay method: the laboratory procedure used to obtain the result.
- Whether the laboratory reports the percentage as received or on a dry basis.
A concentrated ingredient and a finished blend can represent different materials. For a useful composition comparison, look for compatible methods and the same calculation basis.
As received versus dry basis
An as-received percentage uses the sample in the state the laboratory received it. A dry-basis percentage uses the dry material as its denominator.
Change that total and the percentage can change sharply without adding any of the measured component.
Can these two results be compared?
| What the reports show | What to resolve before comparing |
|---|---|
| One tests a shilajit ingredient; the other tests a finished blend | They describe different samples. Obtain results for comparable materials. |
| One says dry basis; the other says as received | Ask for results on the same basis, with the moisture measurement needed for any conversion. |
| One measures fulvic acid; the other combines humic and fulvic acids | They measure different fractions. The combined figure is not a fulvic-only result. |
| Both name the same fraction but use different methods | Ask the laboratory whether the methods produce comparable results. |
Keep the sample identifier beside the result. The laboratory report guide explains how to match the tested sample to the product batch.
03
How 20% becomes 40%
Take an illustrative 100 g sample containing 20 g of a measured component and 50 g of water.
| Calculation | Result |
|---|---|
| 20 g component ÷ 100 g whole sample | 20% as received |
| 20 g component ÷ 50 g dry material | 40% on a dry basis |
The component did not double. Both calculations describe the same 20 g against different totals.
A second calculation
An illustrative 100 g sample contains 20 g water and 8 g of a measured component. Its dry mass is 80 g.
- As received: 8 ÷ 100 = 8%.
- On a dry basis: 8 ÷ 80 = 10%.
Again, the amount stays at 8 g. Keep the reporting basis beside the result when recording or sharing it.
04
What a higher percentage leaves unanswered
A larger figure may reflect a different method, preparation or denominator. It does not, by itself, establish greater health benefit, lower metal concentrations or satisfactory microbiological results. Those questions require their own evidence.
Other shortcuts do not supply the missing measurement:
- An extract ratio cannot calculate fulvic acid percentage.
- Taste or bitterness cannot quantify it.
- Removing water and purification describe different changes.
If a headline percentage omits the method or basis, request the full report. If that percentage also explains a price premium, ask the seller what was measured and why the two products are comparable. The answer needs to account for the numbers, not just repeat them.
THE REFERENCES
Go to the source.
- Eurachem: Fitness for Purpose of Analytical Methods, third edition (2025)Accessed 2026-10-04
- International Humic Substances Society: Isolation of IHSS SamplesAccessed 2026-10-04