Assertion: poppy seed's level | /r/HasSubevent | serious adverse effects
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Source sentences:
text: While "Drugs.com" reports that poppy seeds are "generally recognized as safe when used as food," the Federal Institute for Risk Assessment, BfR, warns that some parents use home remedies containing poppy seeds to help their children sleep through the night and that varying levels of codeine and morphine within different types of seeds may lead to serious adverse effects.