Skim milk contains on average 3.7g of protein per 100mL, but this will vary slightly between brands.

All types of cow's milk are a source of high-quality protein, which means they contain all the essential amino acids required by the body.

Skim milk contains on average 3.7g of protein per 100mL or 9.2g in a cup (250mL). This is slightly higher than regular fat milk which contains 3.5g of protein per 100mL.

Protein content will vary slightly from brand to brand, and some products have been formulated to be higher in protein.

References

Food Standards Australia New Zealand. Australian Food Composition Database. 2019