Milk powder is one of the most important raw materials in the food and dairy industries. It helps manufacturers use milk with a longer shelf life, easier transport and better control in formulations. However, not all types of milk powder behave in the same way.
Two of the most widely used products in this group are Whole Milk Powder (WMP) and Skim Milk Powder (SMP).
The main difference between the two is their fat content, but the difference is not limited to fat. Fat content can affect taste, energy value, solubility, stability, texture and even the final use of the milk powder.
So if you are looking for the right milk powder for a food product, understanding the difference between WMP and SMP is very important.
What is Whole Milk Powder?
Whole milk powder is made from fresh milk and keeps a large part of the natural milk fat. During production the water in the milk is removed and the milk solids are turned into powder.
For this reason, WMP usually has a taste and sensory profile closer to whole milk.
The fat gives whole milk powder a richer taste and a creamier texture. On the other hand, the same fat makes its storage and packaging conditions more important.
Whole milk powder is used in products where milk fat can contribute to taste, texture or nutritional value.
Common uses of WMP
Whole milk powder is used in many industries, including:
- Chocolate and cocoa products
- Ice cream and dairy desserts
- Bakery products and cakes
- Infant formula and powdered drinks
- Dairy products
- Some prepared and ready-made foods
- Products with a creamy taste and texture
In many of these products, the fat in WMP is part of the expected character of the final product.
What is Skim Milk Powder?
Skim Milk Powder (SMP) is made from skimmed milk, or milk from which most of the fat has been removed. Its fat content is therefore much lower than that of Whole Milk Powder.
In return, a significant part of the milk protein, lactose and minerals remains in it.
For this reason, SMP is not just a low-fat version of WMP; in many formulations it plays a different role because of its protein profile and low fat content.
SMP is used in the dairy, beverage and bakery industries and in many food formulations.
Common uses of SMP
Some common uses of skim milk powder are:
- Dairy drinks
- Dairy and fermented products
- Ice cream and desserts
- Bakery products
- Chocolate and confectionery
- Foods with controlled fat
- Protein formulations
- Food industry and milk processing
What is the difference between WMP and SMP?
The most important difference between the two products is fat content.
WMP keeps a significant amount of the natural milk fat, while most of the fat has been removed from SMP.
For a manufacturer, however, this difference can have several important effects.
1. Fat content
This is the first and most important difference.
In WMP, milk fat plays an important role in the composition of the product. This powder can therefore give the final product more energy, flavour and mouthfeel.
In SMP the fat content is much lower. As a result, the manufacturer can control the fat level of the formulation with other raw materials.
2. Protein
Both types of milk powder contain milk proteins, but the ratio of protein to total solids is higher in SMP, because much of the fat has been removed.
This makes SMP a good choice for many formulations that need milk solids and protein.
The exact protein content, of course, depends on the product specification and the production standard.
3. Taste and texture
Because of the milk fat, WMP usually gives a richer taste and a creamier mouthfeel.
SMP, in contrast, has a lighter taste and is suitable when the manufacturer does not want a lot of fat coming in through the milk powder.
So if the creamy taste and mouthfeel of the product are very important, WMP can be a good choice. For formulations where fat control matters more, SMP is used more.
4. Shelf life and storage conditions
Milk fat is sensitive to oxidation. For this reason, storing WMP requires close attention to packaging, temperature, humidity and contact with oxygen.
Because it contains far less fat, SMP is in a different position in this respect.
Even so, both types of milk powder must be stored in suitable conditions. Humidity, high temperature and unsuitable packaging can affect the quality of the powder.
So when buying milk powder, not only the type of product matters; packaging, transport and storage conditions matter too.
WMP or SMP: which one to choose?
The answer depends on your final product.
Neither powder can be considered suitable for all products in general. The right choice should be made based on the formulation, the expected characteristics of the product and the final cost.
Choose WMP if:
- You need milk fat in the final product.
- A rich, creamy taste is important.
- You want part of the fat required by the formulation to come from milk.
- Your product needs a richer mouthfeel and texture.
- In products such as chocolate, ice cream or some bakery products, you use the properties of milk fat.
Choose SMP if:
- You want to control the fat level of the formulation.
- You need milk solids and protein.
- You do not want a lot of fat in the product.
- The final product must be made with lower fat.
- You want more flexibility to adjust fat with other raw materials.
Is SMP only for low-fat products?
No.
This is one of the common misconceptions about Skim Milk Powder.
Although the fat content of SMP is low, its use is not limited to "low-fat" products. Manufacturers can use SMP in different formulations and, if needed, add the fat they want from other sources.
For example, a manufacturer may use SMP to supply protein and milk solids, and then adjust the fat level of the product with other raw materials.
For this reason, SMP is a flexible raw material for many food formulations.
Is WMP always more expensive than SMP?
The price of milk powder depends on many factors, and a decision about price cannot be made on the type of product alone.
Fat content, milk quality, production process, technical specifications, packaging, order volume, market conditions and transport cost can all affect the final price.
On the other hand, the purchase price is not the only important factor.
A cheaper milk powder may not suit your formulation and may end up costing more. It is therefore better to look at the price together with the technical specifications and performance of the product.
What specifications should we check when buying milk powder?
Choosing WMP or SMP is only the first step. After that you need to check the technical specifications of the product.
1. Fat content
Especially for WMP, fat content is one of the most important parameters.
2. Protein content
The amount of protein can affect how the product performs in different formulations.
3. Moisture
High moisture can affect the quality, stability and behaviour of the powder during storage.
4. Solubility
For products in which the powder must dissolve in water or other liquids, solubility is very important.
5. Heat treatment
The type of heat treatment can also affect the functional properties of milk powder.
For industrial uses, the choice between Low Heat, Medium Heat and High Heat should be made based on the final application.
6. Microbiology
Microbiological specifications must comply with the standard and the intended use.
7. COA
It is always best to check the product Certificate of Analysis (COA) before buying, so that the real specifications of each shipment match your needs.
WMP and SMP in the food industry
Both products play an important role in the food industry, but their uses are not the same.
For example, in chocolate production, milk fat can affect the taste and texture of the product. In such cases, WMP can cover part of the formulation need.
In contrast, in some beverages or dairy products the manufacturer may need milk protein and milk solids but not want a large amount of fat coming in through the milk powder. In this case SMP can be a good option.
In the bakery industry, too, both types of milk powder can be used depending on the formulation.
So the choice of milk powder should work backwards from the final product: first decide what characteristics the product must have, then choose the right raw material.
Conclusion
Whole Milk Powder (WMP) and Skim Milk Powder (SMP) are both important raw materials in the food industry, but because of the difference in fat content they do not have the same use or performance.
WMP keeps a significant part of the milk fat and can give a richer taste, more energy and a creamier mouthfeel. For this reason it is widely used in products such as chocolate, ice cream, desserts and some bakery products.
SMP, on the other hand, has much less fat and can be a good option for formulations that need protein and milk solids, especially when the manufacturer wants better control of the fat level.
In the end, the choice between WMP and SMP depends on the final use, the formulation, the technical specifications and the expected characteristics of the product.
For industrial purchasing, besides price, it is also best to check parameters such as fat, protein, moisture, solubility, heat treatment, microbiological specifications and COA.