GSTM1 and Hypertension: Participants were significantly different in terms of age, sex, different ethnic composition, UA, family PIR, smoker, alcohol user, the complication of hypertension, BMI, TG, marital status, Manganese, mean energy intake, Hb, education level, BUN, Mercury, Scr, TC, HDL-C, and Selenium when grouping by vitamin D quartiles.