Star of Bethlehem (Ornithogalum umbellatum) is a plant. Its bulb contains chemicals called toxic cardiac glycosides, which can lead to death when consumed.
The cardiac glycosides in star of Bethlehem affect the heart. These chemicals can slow the heart rate down.
People use star of Bethlehem for congestive heart failure (CHF), but there is no good scientific evidence to support this use. Using star of Bethlehem is unsafe.
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