Ultra Premium — all six signals simultaneously: resin form, standalone public COA, named third-party lab, stated manufacturing country, GMP certified, and a patented process
Premium — public COA from a named third-party lab (any product form qualifies)
Average — some testing transparency (a COA of any kind, or a named lab) but does not meet all Premium criteria
Poor — no COA and no named independent testing lab
COA Status
Public — a downloadable or directly linkable Certificate of Analysis is publicly available (+2 pts)
Page-embedded — COA shown as an image on the product page but not independently downloadable (+1 pt)
On request — brand states a COA exists but you must contact them to receive it (+1 pt)
None / Unknown — no COA evidence found (+0 pts)
Other filters
Named lab — the brand publicly identifies the third-party testing laboratory (e.g. Eurofins, NSF) (+2 pts)
Heavy metals tested — tested for lead, mercury, arsenic, and cadmium. “Confirmed” = verifiable evidence; “Unverified” = brand states testing but no independent verification
Form — the physical format of the supplement; resin is least processed and scores highest (+4 pts)
US Made — brand claims US manufacturing, which carries FDA 21 CFR Part 111 oversight (+3 pts)