Whey protein isolate

When sourcing WPI, the protein content should be at least 90% on a dry basis. Ensure the product undergoes cross-flow microfiltration (CFM) rather than ion exchange to preserve sensitive subfractions like immunoglobulins and lactoferrin. Additionally, check for low lactose (<1%) and fat content (<1%), which distinguishes Isolate from Concentrate.

Suppliers must provide HACCP and ISO 22000 certifications to ensure food safety management. For specific markets, look for FDA registration (USA), EFSA compliance (EU), and GMP (Good Manufacturing Practice). If targeting specific consumer groups, verify Halal, Kosher, or Non-GMO Project Verified certifications.

Request a Certificate of Analysis (COA) for every batch. It is critical to check for 'Protein Spiking' by reviewing the amino acid profile; ensure the BCAA (Branched-Chain Amino Acids) ratio is naturally occurring (typically 2:1:1 for Leucine, Isoleucine, and Valine). Conduct third-party lab testing (e.g., SGS or Eurofins) to test for heavy metals like Lead, Arsenic, and Mercury.

For beverage applications, the powder must have instantized properties, usually achieved through a small amount of soy or sunflower lecithin (<1.5%) to ensure it dissolves without clumping. The sensory profile should be neutral with no bitter aftertaste, allowing for flexible flavoring in end-products.

The primary risk is adulteration or nitrogen spiking, where suppliers add cheap nitrogen-rich compounds (like melamine or taurine) to fake higher protein readings. To mitigate this, use Made-in-China.com's Secured Trading services and insist on pre-shipment inspections. Another risk is shelf-life degradation; ensure the product has at least 18-24 months of remaining shelf life upon arrival.

WPI pricing is heavily influenced by global dairy commodity indexes. Negotiate based on volume-tiered pricing; for example, a 1-ton order vs. a 10-ton order can see a price difference of 10-15%. Ask for tiered MOQs if you are a new buyer, starting with a sample pallet (approx. 500kg) before committing to full container loads (FCL).

Whey protein is sensitive to heat and humidity. For long-distance sea freight, specify cool and dry storage conditions (below 25°C and 65% humidity). Ensure the packaging uses multi-wall kraft paper bags with a PE inner liner or heavy-duty plastic buckets to prevent moisture ingress and punctures during transit.

Always verify the supplier's Business License and Export Permit. Use Escrow-based payment terms where funds are only released after the Bill of Lading (B/L) is verified. Stay updated on import tariffs and HS Codes (typically 3502.20) to avoid unexpected customs duties or clearance delays in your destination country.