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Can you have whey if allergic to casein?

If you are allergic to casein, you may still be able to consume whey, but it depends on the severity of your allergy and the specific type of whey product. Here's why:

  1. Different Proteins: Casein and whey are both proteins found in milk, but they are distinct in their structure and properties. A casein allergy does not automatically mean you are allergic to whey.
  2. Whey Types: Whey protein comes in several forms, such as whey concentrate, whey isolate, and whey hydrolysate. Whey isolate and hydrolysate undergo more processing, which can reduce the lactose and casein content.
  3. Trace Casein: Even in whey products, trace amounts of casein can sometimes be present. This is particularly true for whey concentrates, which are less processed.
  4. Severity of Allergy: For those with a severe casein allergy, even trace amounts of casein found in some whey products could trigger a reaction. In such cases, it's crucial to consult with a healthcare provider before trying whey.
  5. Testing Tolerance: If your allergy is not severe, you might be able to consume whey without any issues. It's essential to start with a small amount under medical supervision.
  6. Lactose Intolerance vs. Milk Protein Allergy: It's also important to distinguish between lactose intolerance and a milk protein allergy. Lactose intolerance is a reaction to the sugar in milk, not the protein, so whey, especially isolates and hydrolysates, might still be tolerable.

Always consult with a healthcare professional or an allergist before making changes to your diet, especially if you have known allergies. They can provide personalized advice and may conduct tests to determine your tolerance to whey protein.

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