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Difference Between Isolate and Hydrolyzed Whey Protein.
Both Whey Protein Isolate & Hydrolyzed Whey Protein (Hydro Whey) are types of whey protein. They are both high quality complete proteins. Before we compare their uses and benefits, let us look at how both are made and some basics.
Let us first understand what whey protein is.
Whey is a Dairy Protein derived from Cow’s Milk.
How is whey protein made?
Whey and Casein are separated through the cheese making process. Either enzymes, heat or acids are added to liquid milk to begin the coagulation process. Generally, Rennet is added to milk to allow Casein and Whey to separate. The Casein will begin to thicken, which allows the Proteins to divide. From there, the liquid Whey is then pasteurized, then dried.
Using different processing techniques, Whey can be made into these common forms of powder, which include Whey Protein Concentrate (WPC), Whey Protein Isolate (WPI) and Whey Protein Hydrolysate (WPH).
| Form | Description |
| Whey protein concentrate (WPC) | Ranges in protein content of 34 – 80% |
| Whey protein isolate (WPI) | • Contains up to 90% protein • Undergoes a filtration process, which removes some of the fat, cholesterol, carbohydrates and lactose |
| Hydrolyzed whey protein | • WPI that is broken down into smaller pieces for rapid absorption |
Whey Protein Isolate
Macronutrients
contains lower levels of carbohydrates and fat because they are filtered out to isolate the protein. It contains up to 90% protein by dry weight. And very less carbohydrates, fats and cholesterol, etc. In laymen term you can consider Isolates being purer or more refined.
Taste
Since most of the dairy notes are removed during the filtration process, whey protein isolate is often clearer in taste. It pairs well with fruity flavours. Not just that it is also used in many protein waters!
Absorption
All whey proteins are considered as fast absorbing (co pared to casein and plant proteins.).
Who should consider Whey Protein Isolate?
People with lactose sensitivity, people on more carb/fat restrictive diets.
Price
Whey Protein Isolate products tend to be more premium (when compared with WPC based or blended proteins.).
Whey Protein Hydrolysate
Is a broken down or partially digested form of whey protein which is quick absorbing. Hydro whey could be made by using either WPC or WPI.
Macronutrients
Depends on whether WPC or WPI was used to make the hydro whey. If WPC was used then the protein percentage could range anywhere from 35-80%, could have more of other things such as carbs, fats, minerals, etc. On the other hand, if made from hydrolysing WPI then it will have upto 90% protein and very little carbs, fats, etc.
Taste
Hydro whey as an ingredient, by itself, is bitter in taste. Typically, products that are 100% made with hydro whey will have unique recipes crafted to mask the bitterness of the protein source.
Absorption
Although all types of whey proteins are considered as fast digesting, hydro whey is even quicker digesting due to it already being hydrolysed/partially digested.
Who Should Consider Hydrolysed Whey Protein?
Active people or athletes who are looking for faster and more recovery.
Price
Hydro whey is technically most refined/processed form of whey protein. It is an expensive ingredient thus hydro whey protein powders tend to be even more premium than WPI powders.
Take Home Message
Both Whey Protein Isolate and Hydrolysed Whey Protein/Hydro whey are types of whey protein. They both are high quality complete proteins and will support your muscle recovery goals. However, depending on your goals, dietary restrictions and budget you may choose one over the other.
