Promelo concentrated extract is a dietary supplement designed to support the normal functioning of the immune system. Made from grapefruit seed extract and a dose of vitamin C, each serving of this product delivers bioflavonoids from the seeds and white parts of the grapefruit, which are known to contain up to ten times more bioflavonoids than the juice itself. This concentrated extract comes in a convenient 50 ml dropper bottle, making it easy to use and dose. It is recommended to take 30 drops (1 ml) three times a day, which can be mixed with water, juices, or infusions. Additionally, its liquid formulation allows for external applications, such as in moisturizers or shampoos.