In this randomized controlled clinical trial , the patients ( n = 54 ) were randomly allocated to the intervention group as ` high-onion ' ( raw red onions : 2 40-50 g/day if overweight and 2 50-60 g/day if obese ) or to the control group as ` low-onion ' ( raw red onions : 2 10-15 g/day ) along with limited liliaceous vegetables for 8 weeks .