BIOS Brand is SOLD OUT TRYPTOPHAN - L-Tryptophan (500mg 120 Caps) - Source Naturals TryptoSNcaps$33.99 120: caps TRYPTOPURE - Life Extension L-Tryptophan tryptopureRetail Price: $32.00Sale Price: $29.99 90: vegetarian_capsules TRYPTOPURE PLUS - Life Extension Vegetarian Caps opttryptRetail Price: $40.00Sale Price: $32.99 90: vegetarian_caps FREE AIR MAIL SHIPPING IN THE UNITED STATES! The statements made here have not been evaluated by the FDA. The foregoing statements are based upon sound and reliable studies, and are meant for informational purposes. Consult with your medical practitioner to determine the underlying cause of your symptoms. Copyright 1997-2009 Life Extension Vitamin Supplies and Life Extension Institute, Inc. All rights reserved.