Unique blend of ingredients including caffeine, L-Carnitine, green tea extract and Pepper extractHelp support your energy and metabolism You work hard at looking good because it makes you feel good. Watching what you eat and exercising can be a lifestyle balancing act, and ON's new lean range is here to help. Opti-lean Fat Metaboliser capsules have a unique blend of ingredients including caffeine, L-Carnitine, green tea extract and Pepper extract that help support your energy and metabolism to help your conquer each busy day.