Because it does not have calories and aids in keeping the body at the appropriate level of hydration, water is the best beverage choice for people trying to lose weight. Other beverages that can assist in weight loss include coffee, green tea, vegetable juice, and smoothies. You can find all of these beverages. Because of the high number of calories and amount of sugar they contain, sugary drinks, such as soda and fruit juice, should be avoided by anyone aiming to reduce their body fat percentage.