Complex sentence: Skyr is a high protein, low-fat product, varying slightly between brands, unflavored skyr is roughly 12% protein, 3% carbohydrate, and 0.5% fat.
Split into simpler sentences: Skyr is a high protein, low-fat product, varying slightly between brands. Unflavored skyr is roughly 12% protein, 3% carbohydrate, and 0.5% fat.