Is there a difference between whey protein isolate, and whey protein?

Whey protein isolate and whey protein concentrate (often just referred to as "whey protein") differ primarily in their composition and processing.

1. Protein Content: Whey protein isolate typically contains more than 90% protein by weight, whereas whey protein concentrate contains about 70% to 80% protein. The isolate undergoes more processing to remove most of the fats and lactose, making it a purer protein source 1 2 3.

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2. Lactose and Fat: Whey protein concentrate contains more fat and lactose than isolate. This makes the isolate a better choice for those who are lactose intolerant or looking for a low-fat option 4 5.

3. Cost: Due to the additional processing, whey protein isolate is usually more expensive than concentrate 1.

4. Digestibility: Whey protein isolate, being more refined, is often easier to digest for people who are sensitive to lactose or other components of whey 2 6.

Both types effectively support muscle protein synthesis, but individual tolerance and dietary goals (such as fat or carbohydrate intake) should guide the choice between them 2 3.