L-tryptophan: An important amino acid that works with serotonin and melatonin that can help lower anxiety. L-tryptophan will not be made by a Pet's overall body so it may only be consumed as food stuff or treats. 'USDA Organic' treats are created with components that have been Accredited organic through https://emilianofntsi.blogginaway.com/34841857/the-smart-trick-of-glucosamine-dog-chews-that-nobody-is-discussing