February 7, 2016


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What other names is L-tryptophan known by?

L-Triptofano, L-Trypt, L-2-amino-3-(indole-3-yl) propionic acid, L-Tryptophane, Tryptophan.

What is L-tryptophan?

L-tryptophan is a protein building block that can be found in many plant and animal proteins.

Possibly Effective for...

  • Treating premenstrual dysphoric disorder (PMDD).
  • Smoking cessation (helping people quit smoking).

Possibly Ineffective for...

  • Treating teeth grinding.
  • Treating facial pain.
  • Improving athletic ability.

Insufficient Evidence to Rate Effectiveness for...

  • Depression, anxiety, seasonal affective disorder, attention deficit-hyperactivity disorder (ADHD), treating sleep disorders, and other conditions.

Natural Medicines Comprehensive Database rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, and Insufficient Evidence to Rate (detailed description of each of the ratings).

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