Muscle Milk relaunches Pro lineup with cleaner protein shakes

Muscle Milk rolled out a complete reformulation of its protein shake lineup, putting ultra-filtered milk at the center of a relaunch that says as much about the category as it does about one legacy brand. The new Pro lineup delivers 26 to 42 grams of complete protein per serving and removes artificial sweeteners, artificial flavors and added colors, a combination aimed at shoppers who still want high protein but now expect a cleaner ingredient panel and a less engineered taste profile.

The change is a sharp reset for a brand whose launch materials describe it as the original ready-to-drink protein shake with nearly 30 years of nutrition expertise. PepsiCo and Gatorade said the reformulated line is now the only national ready-to-drink protein shake made with ultra-filtered milk and no artificial sweeteners, artificial flavors or added colors. That positioning matters in a crowded protein aisle where newer brands have won attention with simpler formulas, better flavor systems and branding that speaks to life outside the weight room.

Marissa Pines said Muscle Milk is working from a new blueprint built around clean ingredients, and said growth was softer than expected in 2025 as competition in protein beverages intensified. The relaunch shows how far the shake category has moved from its old bodybuilder-fuel identity. Muscle Milk is now selling a product that can fit more occasions, from post-workout recovery to an on-the-go breakfast or afternoon snack, while still promising the nutrient density that keeps protein drinks in shopping carts.

The timing also points to a broader reset beyond one bottle. Muscle Milk announced the overhaul on May 15, 2026, and PepsiCo said the powder line will follow later, with new packaging expected later this year and a cleaner-ingredients label planned for 2027. That makes this less like a routine line extension and more like a multiyear repositioning, one that trades on legacy recognition while updating the brand for a market that now rewards simplicity, convenience and trust as much as protein count.