American WPC 80 has fallen 15.3 percent in a month on the Vesper Price Index, while MPC 85 rose 8.5 percent and MPI 90 5.1 percent. Over twelve months WPC 80 is still the largest riser in the American protein complex, up 87.5 percent.
More American spot production capacity is pushing product onto the market, manufacturers are looking for export sales, and buyers abroad are holding off in the hope of lower prices. Milk protein is tight by comparison: supply is available in the United States, but only at a significant price. WPI has held its ground, up 1.4 percent over the month.
At the commodity end, export demand for American dry whey has stayed very strong all year. In our newly published US Sports Nutrition Q4 2026 Market Outlook, our dairy analyst Jasper Endlich sets out where he expects each product to go, and how our AI forecast compares.
Download the US Sports Nutrition Q4 2026 Market Outlook
What our US Sports Nutrition Q4 2026 Market Outlook answers
The report covers dairy protein, eggs, cocoa and nuts. For US whey and milk protein, it answers:
- Will US whey protein prices keep falling in Q4 2026?
- What is the US WPC 80 price forecast for 2027?
- Where is the floor under US WPC 80 prices?
- How far can MPC 85 rise before buyers switch back to whey?
- Why is US WPI holding up better than WPC 80?
- What is the outlook for MPC 85 and MPI 90 prices in the US?
- Will sweet whey powder stay firm in the US into Q4?
- How much is US whey powder production growing?
- Why are US whey permeate prices so low against longer-term averages?
- Is whey protein demand still growing at today’s prices?
- Where does Vesper’s AI forecast see WPI, MPI 90 and lactose by Q2 2027?
