The present invention provides a method of stabilizing immunoglobulins in a solution having a pH below 4 by adding cereals or hydrolysed cereal products in an amount sufficient to prevent degradation. The present invention also provides a health drink or sports drink comprising immunoglobulins in a solution having a pH of 2.7 3.8 containing cereals or hydrolysed cereal products in an amount sufficient to prevent degradation of the immunoglobulins.