Proteins - Whey: Market Size & Forecast 2026

The global whey protein market sits at approximately USD 14.2 billion in 2025 (base year), held in a structurally tight balance between accelerating protein-fortification demand, a US-China tariff stack that adds ~40% landed cost on Chinese-origin whey, and a feedstock supply chain anchored in cheese-plant by-product economics. Our base case runs a 6.8% CAGR through 2032, carrying the market to roughly USD 22.5 billion [Claight estimate: segment-weighted across WPC 4.5%, WPI 7.5%, WPH 8.0%, demineralised whey 5.5%, permeate 4.0%]. > **Analyst Take.** Our view: the headline 6.8% CAGR is the central case; we lean closer to a 5.5-6.0% outcome in our conservative scenario because the tariff stack will suppress Chinese-import substitution that historically anchored global pricing. The real inflection for 2026-2027 is the spread between WPC-80 and WPI: it widened through 2025 on clinical-grade

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