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What are the risks of taking phenylalanine?

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People with certain conditions should avoid using phenylalanine, including those with schizophrenia (Tardive dyskinesia, a movement disorder, may develop). You should avoid the supplement if you have sensitivity to phenylalanine or a condition in which your body can't break down phenylalanine.

Also be careful taking phenylalanine if you have:

It is unknown whether this supplement is safe in women who are pregnant or breastfeeding.

  • High blood pressure
  • Trouble sleeping
  • Anxiety or other psychiatric problems

From: Phenylalanine WebMD Medical Reference

SOURCES:

Natural Standard Professional Monograph: "Phenylalanine."

AltCareDex, "Phenylalanine."

American Academy of Dermatology: "Vitiligo."

March of Dimes: "PKU (Phenylketonuria)."

Natural Standard Bottom Line Monograph: "Phenylalanine."

University of Maryland Medical Center: "Phenylalanine."

Reviewed by Carmen Patrick Mohan on May 18, 2017

SOURCES:

Natural Standard Professional Monograph: "Phenylalanine."

AltCareDex, "Phenylalanine."

American Academy of Dermatology: "Vitiligo."

March of Dimes: "PKU (Phenylketonuria)."

Natural Standard Bottom Line Monograph: "Phenylalanine."

University of Maryland Medical Center: "Phenylalanine."

Reviewed by Carmen Patrick Mohan on May 18, 2017

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What are possible interactions when taking phenylalanine?

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THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

    This tool does not provide medical advice. See additional information.