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Short answer: the only lab document Fristfei publishes for its product is issued by the brand or manufacturer, not an independent laboratory, so its purity and heavy metal claims can't be independently confirmed.
Fristfei has one shilajit gummy on ShilajitDB, graded D. Its COA is issued by the brand, not an independent laboratory, and reports heavy metals as pass/fail only.
Sort defaults to highest Transparency Grade, then highest Quality Tier.