Dangers
In rare cases, yarrow can cause severe allergic skin rashes; prolonged use can increase the skin's photosensitivity. This can be triggered initially when wet skin comes into contact with cut grass and yarrow together.
In one study, aqueous extracts of yarrow impaired the sperm production of laboratory rats.
Read more about this topic: Achillea Millefolium
Famous quotes containing the word dangers:
“The chief reason warfare is still with us is neither a secret death-wish of the human species, nor an irrepressible instinct of aggression, nor, finally and more plausibly, the serious economic and social dangers inherent in disarmament, but the simple fact that no substitute for this final arbiter in international affairs has yet appeared on the political scene.”
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“Monarchs ought to put to death the authors and instigators of war, as their sworn enemies and as dangers to their states.”
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—Elizabeth Cady Stanton (1815–1902)