Fig. 4. Comparison of corrected hydrogen responses to glucose and white, standard whole wheat, and fine whole wheat flour breads of methane-producers [subjects (P) with methane responses>10 ppm above fasting value (n=8) and those (N) who did not produce methane (n=18)]. Mixed procedure: Treatment p<0.005; Time p<0.0001; Treatment^*time p<0.002; Group NS.