An adverse reaction to a substance normally harmless to others is deemed allergic. Allergies are not limited to hives, hay fever and asthma. Individuals may develop an endless combination of mild to severe behavioural, emotional and physiological problems – exposure to chemicals, pollen, dust mould, food etc. Nutrition has deteriorated – we no longer have a strong immune system! MSM is extremely beneficial for allergies. Users repeatedly say that chronic allergies have improved immeasurably. These were frequently people for whom medication had provided only limited relief!