A British student revealed she could only eat about 25 foods without risking a life-threatening allergic reaction, as her body continued developing new allergies. Kate Hegan, 22, spent every day fearing it could be her last, after being diagnosed with the rare condition mast cell activation syndrome (MCAS). The condition causes her body to react unpredictably to food , smells, temperature changes and even her own hormones. The teaching student, from Somerset, said one thing had made the