Eating too many of the nuts over a long period of time may cause an overdose
of selenium. Early signs of selinium overdose include a garlicy smell on the breath, poor apetite, white spots on the skin or nails and sour taste in the mouth. If left untreated, further symptoms will occur, including hair loss, tooth decay, brittle nails, loss of feeling in the hands and feet, and discoloration of the skin. If you notice these symptoms, limit your intake of Brazil nuts.