Black tea, is a type of tea that is more oxidized than oolong, yellow, white and green teas. Black tea is generally stronger in flavor than other teas. All five types are made from leaves of the shrub Camellia sinensis, though Camellia taliensis is also used rarely. Black tea has the highest amount of caffeine, which makes it weight-loss-friendly. More caffeine means an extra boost of energy that can help you burn more calories. A study conducted in 2014 found that drinking three cups of black tea regularly increased weight loss as well as reduced waist circumference. MOQ 14 MT Supplied from India, Sri Lanka, Kenya and Indonesia.