Propolis is a resinous material produced by bees, it uses it to protect the hive from external aggression. Cranberry is a plant native to North America. Its high concentration of A2 type proanthocyanidins singularizes it compared to all plants in the wing family. The Propolis/Cranberry couple has been the subject of a scientific assessment recently published in an internationally renowned professional journal. Duab also contains zinc which contributes to the normal functioning of the immune system.
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