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Hei Chou/Qian Niu Zi (Hei Chou) is a traditional Chinese herb also known as Morning Glory Seed.
Concentrated powders of natural herbal products tend to absorb moisture from the air. Hence, it is necessary for the manufacturer to add a suitable amount of excipient to stabilize the concentrated herbal products. Non-GMO starch which contains maltodextrin, are used as excipients.