Figure 1.

Effects of collagen‐peptide administration on humoral immune responses. BALB/c mice fed a diet with or without collagen peptides were intraperitoneally injected with 10 μg of OVA and Alum at weeks 1, 2, and 3. Serum was collected from each mouse, and total and OVA‐specific IgE and IgG were measured using ELISA. Values are means ± SEM (n = 16) obtained by two independent experiments. **P < 0.01.