Costus (Saussurea costus) is an herb native to China and India. Its root and essential oil are used in traditional medicine systems such as Ayurveda and Unani.
Costus root contains chemicals that might kill parasites and slow down activity in the intestines.
People use costus for parasite infections in the intestines and other conditions, but there is no good scientific evidence to support these uses.
Is It Effective?
There is interest in using costus for a number of purposes, but there isn't enough reliable information to say whether it might be helpful.
Is it Safe?
When taken by mouth: Costus oil is commonly consumed in foods. But costus often contains a contaminant called aristolochic acid. Aristolochic acid damages the kidneys and causes cancer. Costus products that contain aristolochic acid are unsafe. Don't use a costus product unless lab tests prove it is free of aristolochic acid.
When applied to the skin: There isn't enough reliable information to know if costus is safe or what the side effects might be.
Special Precautions & Warnings:
Pregnancy and breast-feeding: There isn't enough reliable information to know if costus is safe to use when pregnant or breast-feeding. Stay on the safe side and avoid use.
Allergy to ragweed and related plants: Costus may cause an allergic reaction in people who are allergic to the Asteraceae/Compositae plant family. Members of this family include ragweed, chrysanthemums, marigolds, daisies, and many others.
It is not known if Costus interacts with any medicines. Before taking Costus, talk with your healthcare professional if you take any medications.
There are no known interactions with herbs and supplements.
There are no known interactions with foods.
There isn't enough reliable information to know what an appropriate dose of costus might be. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult a healthcare professional before using.
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