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L-Tryptophan

Is L-Tryptophan Safe?

At this time, it is not clear if L-tryptophan supplements are safe for the general public. There is some concern that it may be responsible for a serious condition known as eosinophilia-myalgia syndrome (EMS). Some people are more likely than others to experience problems. Therefore, you should talk with your healthcare provider before taking L-tryptophan if you have:
 
  • Liver disease, such as liver failure, cirrhosis, or hepatitis
  • Kidney disease, such as kidney failure (renal failure)
  • High levels of eosinophils in the blood (known as eosinophilia)
  • Any allergies, including allergies to foods, dyes, or preservatives.
     
Also, let your healthcare provider know if you are:
 
Make sure to tell your healthcare provider about any other medications you are taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.
 
(Click Precautions and Warnings With L-Tryptophan for more information, including any available warnings and precautions.)
 

Dosing Information

There is little reliable information available about a safe and effective dose of L-tryptophan supplements for medicinal purposes. Therefore, make sure to follow the specific instructions on your particular product.
 
(Click L-Tryptophan Dosage for more information.)
 
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L-Tryptophan Supplements

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