Abstract
Every year, during the winter season, 2 out of 4 adults complain of upper
respiratory tract infections [1]. The β-glucan has a therapeutic effect on decreasing the
symptoms of upper respiratory symptoms of infections such as cold and flu. Talbott et
al. show that the healing effect of β-1,3/1,6-d-glucan on the psychological well-being
of people who are experiencing a moderate levels of physicological stress and upper
respiratory tract symptoms [2].