Milk solids are the parts of milk that are left behind when all the water is removed, usually appearing as a dry powder used in many packaged foods and dairy products. They include fat, protein, lactose (milk sugar), and minerals such as calcium and phosphorus.

Quick Scoop

  • Milk is about 87% water and 13% solids , and that 13% is what people mean by ā€œmilk solidsā€.
  • On an ingredient list, ā€œmilk solidsā€ usually means milk (or skim) that has been dried into a powder and added back to the product.
  • These solids contain proteins (like casein), lactose, milk fat, and minerals, which affect taste, texture, and nutrition.

What milk solids actually are

  • Technically, milk solids are everything in milk except the water: fat, proteins, carbohydrates (lactose), vitamins, and minerals.
  • When milk is dried, that remaining powder is essentially ā€œmilk solidsā€ and is very similar to supermarket milk powder.

On food labels

  • On labels, ā€œmilk solidsā€ can refer to full-cream milk powder, skim milk powder, or broader dried milk ingredients like whey, casein, lactose, and milk fat.
  • Because the term is broad, two products both listing ā€œmilk solidsā€ can differ a lot nutritionally depending on whether more protein (whey/casein) or more lactose (sugar) is used.

Why manufacturers use them

  • Milk solids help improve creaminess, body, and mouthfeel in lowā€‘fat yogurts, milks, and ice creams without adding as much fat.
  • They are also used to boost protein, adjust sweetness via lactose, and stabilize texture in products like chocolate, baked goods, and coffee whiteners.

Vegan and dietary angle

  • For anyone avoiding dairy (vegans, people with milk allergy), ā€œmilk solidsā€ still count as milk and are not suitable.
  • People with lactose intolerance may react to products with milk solids, since they typically contain lactose unless specifically made lactoseā€‘free.

Information gathered from public forums or data available on the internet and portrayed here.