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This page collects all available Certificates of Analysis, third-party lab test results, and testing transparency information for Bossko The Way To The Top products in the ShilajitDB database. Data is sourced from publicly available brand documentation and independent research. We do not accept payment from brands and our assessments are not influenced by commercial relationships.
COA status
Public — directly accessible without contacting the brand. The strongest signal.
On request — available but requires asking; cannot be independently verified without effort.
None — no Certificate of Analysis is available.
Third-party lab
The named laboratory that performed testing. Only a named, independent, ISO 17025-accredited lab earns full credit in our grading. "In-house" or unnamed labs do not count as third-party.
Heavy metals
Confirmed — the COA shows actual numeric concentrations for lead, arsenic, mercury, and cadmium.
Claimed — the brand states testing was done but specific numeric values are not publicly available.
COA document review notes
COA from Shenzhen ZTS Testing Service Co., Ltd (not a recognized accredited lab). Heavy metals (Lead/Arsenic/Mercury/Cadmium) are all reported as '0%', which is not a standard or credible way to report heavy metal test results (expected: ppm or ND/<LOQ). Left as PUBLIC since a document exists, but flagged as low-confidence.
About this data
COA status is assessed based on publicly available documentation. A certificate is marked "Public" only when it is directly accessible (via a link or embedded on the brand's website) without needing to request it. Heavy metals are marked "Confirmed" only when the COA includes actual numeric concentrations (e.g., Pb: 0.15 ppm) rather than a pass/fail stamp. Testing laboratory names are recorded as stated in the COA document; we do not independently audit lab accreditation for every entry.