Which protein source contains lactose and may therefore be unsuitable for individuals with lactose intolerance?

• A. Whey protein concentrate
• B. Egg white protein powder
• C. Beef protein isolate
• D. Pea protein isolate

Answer: (A)

Verified step by step guidance

1. Understand that lactose is a disaccharide sugar found primarily in milk and dairy products.
2. Recognize that protein sources derived from milk, such as whey protein concentrate, may contain lactose because they are not completely purified to remove all milk sugars.
3. Identify that egg white protein powder, beef protein isolate, and pea protein isolate come from non-dairy sources (eggs, meat, and plants respectively) and therefore do not contain lactose.
4. Conclude that among the given options, whey protein concentrate is the protein source that contains lactose and may be unsuitable for individuals with lactose intolerance.
5. Remember that lactose intolerance is the inability to digest lactose due to a deficiency in the enzyme lactase, so avoiding protein sources containing lactose is important for affected individuals.