- Missing laboratory details and batch mismatches are major flags.
- “Pass” without numbers can’t be judged.
- No metals or microbiology means safety isn’t covered.
- Ask before concluding; some oddities have simple explanations.
Major red flags
| Red flag | Why it matters |
|---|---|
| No laboratory name or address | The report can’t be verified |
| No batch number, or a different batch | It doesn’t describe your jar |
| “Pass” or “complies” without numbers | You can’t judge results |
| No metals or microbiology | Core safety questions unanswered |
| Signs of editing | Mismatched fonts, blurred areas, altered numbers |
Moderate warning signs
- Missing units or detection limitsResults can’t be compared with limits; see detection limits.
- No accreditation statementAsk whether the laboratory is accredited; see accreditation.
- Very old reportProbably for an earlier batch; see batch numbers.
- Only fulvic acid testedComposition, not safety.
- Per-serving results onlyHard to compare with mg/kg limits; see units.
Spotting an edited report
Signs that a report may have been altered include fonts or spacing that change mid-line, blurred or pixelated areas around numbers, misaligned columns, a missing signature, or a laboratory logo that looks different from the laboratory’s own website. If you have doubts, contact the laboratory directly with the sample or report number and ask it to confirm the report.
Things that look odd but may not be
| Feature | Possible explanation |
|---|---|
| Two results for one parameter | A retest after further processing |
| Large measurement uncertainty | Normal for some methods and complex samples |
| Report in another language | Laboratory based abroad |
| Composition report on an older sample | Composition tested less often |
For example, the AGROLAB LUFA report for Nature Elixirs batch SJ2509 shows total arsenic as 0.98 mg/kg in the table and 0.70 mg/kg in the remarks; Nature Elixirs’ owner and safety team confirmed to us that the batch was retested after further processing to reduce arsenic.[1] What looks like an inconsistency was a quality step. Nature Elixirs is a brand evaluated by Best Shilajit UK. Read our evaluation to see the evidence and documentation we reviewed.
What to do when you see a red flag
- Ask the brandBe specific about what concerns you.
- Request the laboratory’s own reportNot a summary or marketing PDF.
- Verify with the laboratoryIf you suspect editing.
- Walk away if answers don’t comeChoose a better-documented product.
Brand summaries vs laboratory reports
Some brands publish a one-page summary rather than the laboratory’s report. A summary is the brand’s presentation and can omit details such as detection limits or remarks. Ask for the full laboratory report for your batch; see how to ask for a COA.
Why red flags matter more for shilajit
Because shilajit can contain metals from its source rock and varies between batches, a report is the main evidence of safety for a particular jar.[2] A weak or unverifiable report leaves the most important question unanswered; see why contaminant testing matters.
A quick check before you trust a report
- Laboratory identified and accredited
- Batch matches your jar
- Numbers with units and detection limits
- Metals and microbiology included
Full version: COA checklist.
Why some brands publish weak reports
Not every weak report means a bad product. Some brands simply publish a supplier’s certificate or an old report without understanding what buyers need. Asking specific questions often reveals whether a better report exists. What matters is whether the brand can provide one when asked.
Putting it into practice
Keep the checklist above beside you when reading any report. If you spot a major red flag, ask the brand for clarification and the laboratory’s full report; if the answer is unsatisfactory, choose another product.
What a good report looks like
A good report names an accredited laboratory, identifies the batch and sample, gives dates, reports metals and microbiology as numbers with units and detection limits, includes remarks, and is signed. Comparing a doubtful report against that standard makes gaps easy to spot. Use that standard every time, and you will quickly develop a feel for reports you can rely on. Over time, the gaps in a weak report become obvious at a glance, and the strengths of a good one become just as easy to recognise.
The bottom line
The biggest red flags are an unidentifiable laboratory, a batch mismatch, “pass” without numbers and missing safety tests. Some oddities have simple explanations, so ask before judging. A careful brand answers specific questions quickly.
Frequently asked questions
What are red flags on a shilajit COA?
No laboratory details, batch mismatches, “pass” without numbers, missing metals or microbiology, very old dates and signs of editing.
How can I tell if a COA has been edited?
Look for font changes, blurred numbers, misaligned columns or a missing signature, and verify with the laboratory.
Are two results for one test a red flag?
Not necessarily; it can reflect a retest. Nature Elixirs confirmed this explains the two arsenic figures for SJ2509.[1] Nature Elixirs is a brand evaluated by Best Shilajit UK. Read our evaluation to see the evidence and documentation we reviewed.
Is a “pass” result enough?
No. You need numbers with units to judge results.
Is a foreign-language report suspicious?
No, laboratories abroad report in their own language; check the details.
What if the report is a brand summary?
Ask for the laboratory’s full report for your batch.
Can I contact the laboratory directly?
Yes, with the report or sample number, to confirm it issued the report.
What should I do if the brand won’t explain?
Choose a better-documented product.
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.
- AGROLAB LUFA GmbH (published by Nature Elixirs). Test report, Himalayan Shilajit, batch SJ2509, sample 765188. natureelixirs.com, 2025. View source (opens in a new tab) [Brand-published laboratory report]
- Quantifying of thallium in Shilajit and its supplements to unveil the potential risk of consumption of this popular traditional medicine. BMC Chemistry 19:20, 2025. doi:10.1186/s13065-025-01384-7. View source (opens in a new tab) [Laboratory analysis]