Gusto is a powdered vegetable drink mix. It is made with broccoli and malunggay, sweetened with stevia (a natural sweetener). What we tried is the variant flavored with Mango.
The mango taste is authentic but subtle. Equally subtle is the leafy flavor of the vegetable components. The ingredient that's notable is stevia. The plant-derived sugar substitute adds the sweet aftertaste that is also sticky to the throat. This effect is similar to that of sodas with artificial sweeteners.
Try it and judge for yourself.