NOW L-Tryptophan 1000 mg, Double Strength, 60 Tablets Critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function. Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery Every lot of is tested to be free of peak E and microbial contamination. CLASSIFICATIONS/CERTIFICATIONS: Kosher, Vegan, Non-GMO NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods  NOW Double Strength L-Tryptophan has twice the L-tryptophan Suggested use Take 1 tablet 1 to 3 times daily on an empty stomach, with final dose at bedtime, or as directed by your physician.   NOW® Double Strength L-Tryptophan has twice the L-tryptophan  as in our regular strength product. Warnings For adults only. Consult physician if pregnant/nursing, taking medication, or have a medical condition. May cause drowsiness. Do not use with alcoholic beverages or while operating heavy machinery. Keep out of reach of children. Natural color variation may occur in this product. Store in a cool, dry place after opening. Warnings For adults only. Consult physician if pregnant/nursing, taking medication (especially antidepressants such as SSRIs and MAOIs), or have a medical condition. May cause drowsiness. Do not use with alcoholic beverages or while operating heavy machinery. Keep out of reach of children. Natural color variation may occur in this product. Store in a cool, dry place after opening. Disclaimer While cosmeclassy strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by cosmeclassy.