Human volunteers will be conditioned for a 8 wk intervention on 3 different test diets providing 30 % energy as fat, 15% energy as protein and 55% energy as carbohydrate according to parallel designed sequences. The test fats used for this study are palm oil, chemically interesterified palm oil and chemically interesterified fully hydrogenated soybean oil and soft oil blend in the form of margarine. Volunteers will be restricted to follow the dietary guidelines throughout the study. Blood collection sessions will held before and after every diet intervention. Outcome measures of the study are serum lipid profile, markers of inflammation, markers of obesity and insulin resistance.