Dietetic food and substances adapted for medical or veterinary use in the field of preparations for the prevention and treatment of obesity, metabolic syndrome and overweight, namely, food supplements containing thylakoids and plant pigments, nutritional supplements containing thylakoids and plant pigments; dietetic food and substances adapted for medical or veterinary use, namely, food supplements consisting of ingredients from photosynthetic plants, vegetables, green leafy agricultural plants, kale, spinach, alfalfa, soy plants, sugar cane, beets, sugar beets, and onions; Food supplements; Plant and herb extracts for medicinal purposes