Mean ascorbic acid and total vitamin C concentrations found in the present study in the untreated milk samples were 4.56 and 5.56 mg/100 ml, respectively. These values lay between those re- ported by others (Buss, McGill, Darlow, & Winterbourn, 2001; Ro- meu-Nadal et al., 2008). When dealing with the vitamin C content of any kind of food, it is important to differentiate between total vitamin C and ascorbic acid contents. The former consists of the sum of ascorbic acid plus dehydroascorbic acid. Dehydroascorbic acid is the oxidation product of ascorbic acid,