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What causes urea cycle disorders (UCDs)?

Urea cycle disorders (UCDs) are caused by a problem with some of the genes in the body. Genes are instructions for everything the body has to do. In a UCD, there is a mistake in the instructions for making some enzymes, which is why ammonia builds up.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.