Shilajit and Fulvic Acid: What's the Connection?
In short: Fulvic acid is a measurable component of Shilajit, but its percentage alone does not establish authenticity, superiority or a health outcome. Read the result alongside the identified sample, method, units, report and finished-product label.
Explore the evidence: View Lab Testing · Compare Capsules and Resin · Choose a format.
Why a high fulvic-acid result is not automatically a red flag
Some online claims suggest that genuine Shilajit must fall within a narrow 5 to 20% fulvic-acid range, or that a substantially higher result must be synthetic or “spiked”. We could find no recognised international standard that establishes either rule.
ISO 19822 describes a procedure for analysing humic acids and hydrophobic fulvic acids in specified fertiliser, soil-amendment and geological materials. It does not set an authenticity range for Shilajit or a 20% maximum. Fulvic substances are analytically defined fractions, not one simple molecule with one universal number.
That does not make every high percentage automatically meaningful or superior. It means the percentage needs to be read with the actual report, the sample identity, the method information and the full finished-product label.
What a high result can and cannot show
A reported concentration can describe the amount measured under a laboratory’s stated procedure for the sample it analysed. On its own, it cannot establish provenance, prove a product is better than every lower-number product, predict a personal outcome or demonstrate clinical effectiveness.
Equally, a high result alone is not a test for synthetic origin or adulteration. Extraction, purification and chemical synthesis are different things. Published procedures used to isolate naturally occurring humic and fulvic fractions use steps such as extraction, acidification and resin separation. The analytical method behind a number therefore matters.
Peer-reviewed human research has also used a purified, standardised Shilajit preparation described as containing at least 50.0% fulvic acid. That study is not research on 5 Rivers products and does not establish an ideal percentage. It does show that high-fulvic, standardised Shilajit is not inherently incompatible with the scientific literature.
Why the method should not be guessed
Claims that any one technique always mistakes unrelated compounds for fulvic acid go beyond what the evidence supports. Method specificity, sample preparation and the definition of the fraction all matter.
The two published 5 Rivers Eurofins certificates identify the fulvic-acid method source as EASI-CHE-SOP-361. They do not identify the instrumental principle as UV-Vis, HPLC or ISO 19822. We therefore describe the reports using the method code Eurofins printed, rather than guessing at a technique.
What the published 5 Rivers reports record
Eurofins tested the current 5 Rivers Nutrition Gold+ Capsules batch ULSG2508357 and Resin batch ULSG2508011. These are the same batches currently used in products sold by 5 Rivers Nutrition. The Capsules report (AR-258-2025-20051564-01) records 79.22 g/100 g fulvic acid; the Resin report (AR-258-2025-20051565-01) records 76.74 g/100 g. Both reports list arsenic, cadmium, lead and mercury. These are analytical results, not evidence of a health outcome. See the Lab Testing page for the full batch reports.
| Report detail | Gold+ Capsules | Gold+ Resin |
|---|---|---|
| Report code | AR-258-2025-20051564-01 | AR-258-2025-20051565-01 |
| Associated batch | ULSG2508357 | ULSG2508011 |
| Report date | 26 August 2025 | 26 August 2025 |
| Fulvic acid | 79.22 g/100 g | 76.74 g/100 g |
| Fulvic-acid method source | EASI-CHE-SOP-361 | EASI-CHE-SOP-361 |
| Arsenic | 0.94 mg/kg | 0.64 mg/kg |
| Cadmium | 0.02 mg/kg | 0.02 mg/kg |
| Lead | 0.63 mg/kg | 0.66 mg/kg |
| Mercury | <0.01 mg/kg | <0.01 mg/kg |
| Metal method source | EASI-CHE-SOP-44 | EASI-CHE-SOP-44 |
View the original laboratory reports, report references and product context. The records provide analytical information for the identified samples. Read them alongside the full ingredient list, labelled serving and warnings. For field-by-field interpretation, see how to read a Shilajit COA.
What to look for when comparing Shilajit
- A full ingredient declaration and labelled serving for the finished product.
- A report that identifies the laboratory, sample, date, report code, method source and results.
- Clear distinction between a compositional result and a promise of health effects.
- Practical details on format, directions, delivery and returns.
At 5 Rivers, we publish the fulvic-acid result and the listed arsenic, cadmium, lead and mercury results for the identified product batches, rather than asking customers to rely on a headline percentage alone.
Choosing between Capsules, Resin and the Bundle
- Gold+ Capsules: 60 vegan capsules and approximately 30 labelled daily servings. The labelled two-capsule serving provides 400 mg of Shilajit extract in total, within a disclosed formula of 11 active ingredients plus a vegetable-cellulose capsule shell.
- Gold+ Resin: a 20 g jar and approximately 40 labelled servings. Its 500 mg serving is the complete six-ingredient formula, including 300 mg of Shilajit extract.
- The Bundle: both complete formats to try separately, not a combined daily-serving routine.
For the preparation and formula differences, compare Capsules and Resin.
Common questions
Does 70%+ fulvic acid prove a product is synthetic?
No. A concentration result is not a provenance test. It should be read with the sample identity, method and broader documentation.
Does a lower fulvic percentage prove Shilajit is more authentic?
No recognised standard establishes that relationship. Natural materials and analytical methods can vary, so one number should not replace a complete evidence review.
Were the 5 Rivers results obtained by UV-Vis?
The published Eurofins certificates do not specify UV-Vis, HPLC or ISO 19822. They identify the fulvic-acid method source as EASI-CHE-SOP-361.
Does fulvic acid percentage prove a health benefit?
No. It is a compositional result, not a promise of an individual outcome.
Sources and further reading
- ISO 19822:2018, scope for humic and hydrophobic fulvic-acid analysis.
- International Humic Substances Society, isolation of humic and fulvic acids.
- Keller et al. (2019), a human study using a standardised Shilajit preparation described as ≥50.0% fulvic acid.
- Journal of AOAC International (2025), a study on spectrophotometric detection of adulterants in commercial fulvic-acid products.
Important: Shilajit Gold+ is a food supplement, not a medicine. Follow the labelled serving and warnings. If you are pregnant or breastfeeding, take medication, have a medical condition or are unsure about suitability, speak with a qualified healthcare professional before use.
Aman Singh
Founder of 5 Rivers Nutrition | Last reviewed: 18 October 2026
5 Rivers batch testing: Eurofins analysed samples from Capsules batch ULSG2508357 and Resin batch ULSG2508011. These are the same batches currently used in products sold by 5 Rivers Nutrition. The reports provide batch-specific results. Read the report codes and results on the Lab Testing page.