Fairlife chocolate protein shake has one main ingredient. Filtered lowfat milk. Every other item on the list is under 1%.
The 26 grams of protein in the bottle comes from filtered milk, not from anything added. Regular lowfat milk is about 8 grams of protein a cup, so 14 ounces would give you around 14 grams. Ultrafiltration pushes the milk through membranes that hold the protein back and let the water and most of the lactose through, then the plant recombines it with more of the protein fraction. That's how you get to 26 with nothing on the list but milk.
The under 1% group is the taste and the texture. Four sweeteners, monk fruit, stevia, acesulfame potassium and sucralose. Each has its own aftertaste, and stacking them at low levels lets each one cover for the others. Then carrageenan, cellulose gel and cellulose gum, three thickeners that keep the cocoa from settling and give the shake some body.
It's about as clean as a protein shake gets.