Journal of the American College of Nutrition -- Fung et al. 22 (6): 533 Figure 1

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Fig. 1. Geometric means of fasting insulin concentrations (µU/mL) by quartiles of magnesium intake according to BMI levels. Adjusted for age (5 categories), total energy (quintiles), physical activity (quintiles), alcohol intake (0g, 0.1–15g, 15.1–30g, >30g/day), smoking (never, past smoker, up to 14 cigarettes, 15+ cigarettes a day), family history of diabetes, and weekly hours of sitting down (5 categories). Q1 to Q4 = Quartiles of magnesium intake. ${blacksquare}$ BMI >25, p for trend = 0.02; ${diamondsuit}$ BMI $<=$ 25, p for trend = 0.2.