Table 1. Peak Area Ratios of Various Metabolite Indices Measured by Proton Magnetic Resonance Spectroscopy (¹H-MRS).

Index	Peak Area Ratio	Frequency
Total lipid	(-CH2-)n/water	1.3/4.7 ppm
Total saturated fatty acid	3(-CH2-)/2(-CH3)	1.3/0.9 ppm
Total unsaturated fatty acid	3(-CH2-C = C-CH2-)/4(-CH3)	2.0/0.9 ppm
Total unsaturated bond	3(-CH = CH-)/2(-CH3)	5.3/0.9 ppm
Polyunsaturated bond	3 (= C-CH2-C =) /2(-CH3)	2.8/0.9 ppm