HIGHEST PURITY: Our products contain zero magnesium stearate?? dioxides?? anti-caking agents?? preservatives?? colors or flavors. There are zero unnatural potentially harmful artificial ingredients of any kind.</br>SAFE: Made in USA. Formulated?? developed and manufactured in USA in FDA registered and GMP compliant faciliites</br>BEST VALUE: Long lasting high dosage 500mg?? 120 Vegetable Capsules</br>100% NO QUESTIONS MONEY BACK GUARANTEE: If you are unsatisfied for any reason at all we stand by our Iron Clad 60 day no questions money back guarantee. Just contact us through Amazon for a full and prompt refund within 24 hours or less.</br></br>Product Description</br></br>"tophan is an amino acid that is converted in thebody to serotonin?? an important neurotransmitter that is critical to many functions in the brain. It is widely used in alternative and complementary medicine as a sleep aid to treat insomnia. As we age?? our bodies naturally produce less serotonin?? and L-Tryptophan can help maintain serotonin levels?? reducing fatigue and preventing weight gain. <br></br><br/>http://www.amazon.com/gp/product/B00TA7QNZUU>L-Ly