Global buyers need more than a high protein percentage. A practical scorecard compares protein, microbiology, heavy metals, price, and traceability. In supplier reviews, the clearest evidence comes from recent, batch-specific documents. Protein results should state the test method, moisture basis, and sample lot. A number without context can mislead. Look for consistent results across several shipments, not one impressive certificate.
Microbiology records should identify testing for Salmonella, E. coli, yeast, and mold. Limits must match the buyer’s destination and product use. Ask for laboratory accreditation and report dates. Heavy metal testing should cover lead, cadmium, arsenic, and mercury. ICP-MS results are useful, but sampling still matters. A clean report cannot represent an untested warehouse pallet. Buyer verification remains essential.
Price needs a landed-cost view: protein concentration, packaging, freight, duties, testing, and rejected-lot risk. The cheapest quote may become expensive after moisture variation or delayed paperwork. Traceability should reach the farm region, harvest period, processor, and lot code. Request mock recall records and retain samples when possible. Some suppliers provide excellent files but weak answers during a live inquiry. That gap deserves a lower score. My scoring would leave room for uncertainty because performance can change after a new crop, laboratory, or processor.