Known as Huang Qin Tang, the mix of plant extracts, roots and fruit has been used for hundreds of years to treat stomach upsets and nausea.
But now researchers have found that it not only does the same for patients on chemotherapy, it also increases the effectiveness of the treatment.
The strong drugs used in chemotherapy cause a number of toxic side effects because it kills healthy cells as well as cancerous ones.
This is particularly true in the digestive tract or intestines.
The team from Yale University found that in mice the use of the Huang Qin Tang mixture helped protect the intestine lining and helped it recover more quickly.
It also reduced inflammation and boosted the effectiveness of the chemotherapy to kill tumours.
The formula used in the experiment consists of four herbs
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