Ironflex L-Tryptophan is an effective support for your sleep. One tablet each day provides 1000mg of L-tryptophan, which helps maintain healthy serotonin levels and provides restful sleep. L-tryptophan, an essential amino acid for the body, is obtained through diet or as a dietary supplement. In more detail, L-Tryptophan from Ironflex offers: Maintaining healthy serotonin levels for restorative sleep and regulating the bodys circadian rhythm. Support in combating jet lag. 1000mg of an important amino acid for your body, every day! Dosage: Take one tablet with water 30-60 minutes before bedtime.