Is whey protein keto?

Yes. Mostly protein with very few carbs. In a protein bar, the protein is rarely the carb problem.

Low-carb: count net. A low-carb ingredient. Count its (small) net carbs as usual.

Whey, milk, casein, soy, pea and egg-white proteins are mostly protein. Isolates have the least lactose or starch left; concentrates keep a little more.

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