Connection with food allergy and protein in urine

Patient: My fiend, a lady of 44 and obese went on to taking a weight loss supplement containing soy protein and whey protein and stopped about a month and a half ago.(she consumed only a months worth of it) recently after consuming some food from outside ( not home cooked) she came into a severe food allergy. now she claims that the cause was the protein supplement as protein in her urine was also detected. is this possible? she is also has hypertension,osteoarthritis and heart problems.