Fig. 8

Thermal images pre- and post-ingestion of capsinoids. Representative images taken at baseline (a, b, c) and at 2.5 h (d, e, f) following ingestion of capsinoids, showing increase in the area and temperature of the thermally active region. The subject’s head was turned to his left in a and d, was facing forward in b and e, and was turned to his right in c and f. Green contour lines circumscribe the ROIs over the C-SCV regions, white pixels >37.4 °C, red pixels 36.8–37.4 °C, yellow pixels 36.5–36.8 °C. Color figure online