European retailers are under increasing scrutiny for how they approach protein diversification – the balance between animal‑ and plant‑based offerings on their shelves. Unlike traditional sustainability assessments, Superlist Europe focuses specifically on protein strategy as a measurable indicator of retail climate leadership. It evaluates how chains integrate plant-based options into their product mix, set targets, report progress, and link these efforts to broader climate commitments. Across the eight markets surveyed, there is a clear variation in how deeply plant-based protein is embedded in commercial planning, supply chain decisions, and marketing strategies. While many retailers report on sustainability in broad terms, fewer have actionable metrics tied to protein balance.