Abstract : Introduction: Numerous metabolic conditions, such as hypertension, diabetes, and cardiovascular diseases (CVD), result from changes in lifestyle varying from strenuous exercises to indulgences. This study investigated the effects of flaxseed powder on blood pressure and body mass index (BMI) with and without Lifestyle modification (LM). The NCEP ATP III criteria for metabolic syndrome (MetS) include a BMI >22.5 kg/m3 and systolic and diastolic blood pressures >130 mm and >85 mm of Hg, respectively. Flaxseed powder has been demonstrated to reduce blood pressure and increase BMI, but its dosage, duration of consumption, and effects on health parameters with or without LM are still unclear. This study provides insights into the extent of improvement in blood pressure and BMI upon consumption of flaxseed powder with and without LM. Method: In this study, 300 individuals were categorized into three groups The first MetS group was recommended 10, 20, or 30 g of flaxseed powder along with LM the second MetS group was recommended only LM and the third group constituted of a healthy individual (control). Baseline parameters were recorded before recommending flaxseed powder and/or LM, the blood pressure and BMI of all individuals were recorded at different time points. Result: Long-term consumption of flaxseed powder improved BMI and Systolic Blood Pressure (SBP). Conclusion: We observed a significant reduction in SBP and BMI of MetS patients who consumed 30 g of flaxseed powder with LM. Furthermore, the best results could be obtained when flaxseed powder is consumed for more than 4–5 months.