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Rhubarb can cause some side effects such as stomach and intestinal pain, watery diarrhea, and uterine contractions. Long-term use can result in muscular weakness, bone loss, potassium loss, and irregular heart rhythm.
There is a report of kidney failure in someone who took a rhubarb-containing product. But there is not enough information to know for sure if rhubarb was the actual cause of kidney failure.
Rhubarb might not be safe for children.
Do not use rhubarb if:
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