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    Encourages Positive Mood* Promotes Restful Sleep* L-Tryptophan is an essential amino acid; therefore, it is not synthesized by the body and must be obtained from the diet.* L-Tryptophan is critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function.* Every lot of NOW  L-Tryptophan is tested to be free of Peak E and microbial contamination. Natural color variation may occur in this product.
   
  
    
      
    
  
  
 
  
  
Now Foods, L-Tryptophan 500 mg, 60 Veg Capsules
  
  
    $17.59
  
  
  
 
  