The purpose of the randomized controlled study was to see what effect the green-MED diet will have on visceral fat tissue. The randomized controlled study, which lasted 18 months, involved 294 participants in all. Three groups of participants were created: the HDG (healthy dietary recommendations), the MED diet, and the green-MED diet. Participants in both MED groups consumed 440 mg of polyphenols and 28 g of walnuts daily. The green-MED group also ingested three to four cups of green tea daily, 100 g of frozen duckweed plant green smoothie, 800 mg of polyphenols daily, and less meat.