A typical 1 oz serving of mozzarella (part-skim) contains 6.8 grams of protein (24.3 g per 100 g), which makes it a moderate source of protein. That covers roughly 14% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Protein accounts for roughly 38% of the calories in mozzarella (part-skim), making it very protein-dense. The rest comes from fat and carbohydrate, so it adds a solid amount of protein while still carrying real energy - useful when you are eating to a calorie target rather than under one.
Among the 81 dairy foods in the database, mozzarella (part-skim) ranks 43rd by protein per serving, and 394th out of all 796 foods on the site. Set against fruit yogurt (lowfat), another dairy food entry in the database, a serving carries about 0.6 g less protein (fruit yogurt (lowfat) has 7.4 g per 1 container).
It is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own. The serving above is measured by weight at 28 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
Source: USDA FoodData Central #170847 - "Cheese, mozzarella, part skim milk" (SR Legacy, published 4/1/2019). Values are the published reference figures for that record, not lab measurements for a specific brand or batch.
Quick answers
Mozzarella (part-skim) protein FAQ
How much protein is in mozzarella (part-skim) per 100 g?
Mozzarella (part-skim) has 24.3 g of protein per 100 g. A typical 1 oz serving (28 g) provides 6.8 g.
Is mozzarella (part-skim) a complete protein?
Yes. Mozzarella (part-skim) is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own.
How much of the Daily Value does a serving of mozzarella (part-skim) cover?
A 1 oz serving of mozzarella (part-skim) contains 6.8 g of protein, about 14% of the 50 g reference Daily Value.
Is mozzarella (part-skim) a good source of protein?
Mozzarella (part-skim) is a moderate source of protein, and about 38% of its calories come from protein, which makes it very protein-dense. Set against fruit yogurt (lowfat), another dairy food entry in the database, a serving carries about 0.6 g less protein (fruit yogurt (lowfat) has 7.4 g per 1 container).