Sentences with phrase «of pyrrolizidine alkaloids»
Contraindications: The plant (but not the oil) contains small amounts of pyrrolizidine alkaloids that may cause toxicity in the liver, and Borage should never be taken in large doses (many times the recommended amount) or for a long period of time.
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Recently, reports of the toxic effects of pyrrolizidine alkaloids in comfrey have led some herbalists to be wary of using it internally.
«Our working group studies the evolution of pyrrolizidine alkaloids.
Not exact matches
It is shown repeatedly that the general public is largely unaware of important consumer health protection topics, such as pyrrolizidine alkaloids in teas and honey, or wrongly classifies them as being of no concern, such as food hygiene in private households.
«With regards to the warnings that comfrey can cause cancer and liver disease, most herbal practitioners point out that those results were from studies that isolated the pyrrolizidine alkaloids and fed or injected them into animal subjects in doses far higher than any typical usage of comfrey leaf, and that comfrey leaf has been regularly ingested by thousands of people around the world without reported ill effects.»