Figure 2.

(a) Normalized average Raman spectra from normal, overweight and obese patients. Highlighted regions are displayed in (c–e). (b) Difference spectra between measurements from normal and overweight patients and normal and obese patients. (c–e) Box plots showing regions of difference between patients with normal and overweight + obese BMI levels. Potential peak assignments: (c) phenylalanine, (d) lipid, (e) C = C bond. The box contains data between the 25th and 75th percentile, with the centerline representing the median. The error bars are ±1 S.D. about the mean. Outliers are represented by +.