Are you trying not to gain weight, and do you drink fruit smoothies, because you think they are healthy? Well, watch out!
Many fruit smoothies contain added sugars and high-fructose corn syrup and are so high in calories, that they sabotage your diet, than help you lose weight. The key here really is in the ingredients. Check if the fruit smoothie contains added sugar, or syrup. Many fruit flavourings added to smoothie are loaded with sugar, so they seem healthy, but they're really not. They syrups, flavouring and added sugar really pack on the calories and promote fat storage.
A healthy smoothie should be made from fresh seasonal fruit, instead of fruit concentrate (since that contains added sugar) and should contain plain yogurt instead of ice cream or frozen yogurt. Using actual fruit and plain yogurt will reduce the calories by half and don't forget will contain only naturally occurring sugar from fruit. A real fresh smoothie as described above is also packed with essential calcium, vitamin and antioxidants which truly make it good for health.