ICONFIT Whey Protein 80 is made from whey protein concentrate (WPC-80), which retains the natural lactose found in whey — typically 3–5 g per 100 g of powder. If you have a diagnosed cow's milk allergy, you must avoid this product entirely because it contains milk proteins (both whey and trace casein) that trigger allergic reactions. For lactose intolerance, tolerance varies: many people can handle small portions spread through the day, especially when taken with other foods that slow digestion. If you are unsure, try a half serving (10–15 g) with a meal and monitor symptoms, or consult a dietitian or doctor for personalised guidance. Lactose-free alternatives (whey isolate, plant proteins) exist if this product causes discomfort.