Trans-Resveratrol is an antioxidant supplement extracted from grapes. Everybody should take at least one antioxidant supplement. They protect brain-cells from "rusting" due to being exposed to oxygen - a process called oxidative stress.
L-Tryptophan is a naturally occurring amino acid which is used to create Serotonin, the "feel good" neurotransmitter. It is a gentler and slower-acting Serotonin precursor compared to 5-HTP, making it a better choice for sustained and long-term use.