Of the following, which are medical myths?

1. Sugar causes hyperactivity in children


2. Suicides increase over the holidays


3. Poinsettia plant ingestion is toxic


4. Nocturnal feasting makes you fat

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All are MYTHS. If you got this right, cheers for you! If not, don't feel so bad. Neither did I. My medical training and years of practice couldn't overturn the "truths" of conventional medical wisdom passed down for decades. To read more about these and other medical myths follow this link to a recent paper in the British Medical Journal.

Vreeman, R. MD. and Carroll, A. MD. "Festive medical myths." BMJ 2008; 337: a2769.