Some common environmental allergens are dust mites, molds, cigarette smoke. Antibiotics kills the good bacteria in the gut but does not affect the yeast leading to an excess of yeast which produces toxins. The symptoms are varied and include headaches, inability to concentrate, depression, mood swing, hyperactivity etc. These symptoms often overlap those of food allergies. Candida can be controlled through proper diet, which is sugar-free, yeast free and more.
Many good books are available on the subject.
Gives an all round approach to the problem. A high intake of refined carbohydrates will cause a sudden raise in blood sugar. Insulin is produced to counteract this. As the blood sugar drops, hormones like glucagon, cortisol and adrenalin are produced to bring the sugar level back to normal. This drop in blood sugar also produces a craving for food, esp.