At Natrol, the quality assurance program is extensive and industry leading. They are committed to ensuring you always get the highest quality, most efficacious and unquestionably pure and safe products. They perform rigorous quality checks throughout our process from exhaustive supplier qualification screening to the sourcing of the best ingredients. Their multiple quality checkpoints throughout the manufacturing process ensure diligent testing of finished products. They also go above and beyond by performing testing on all of our finished products to ensure all the ingredients are at levels that are efficacious for you all the way through the expiration date. They guarantee that with every product, what is stated on the label is in the bottle for the life of the product. Period. Natrol takes quality seriously and takes meticulous care in ensuring their products work to better your health and overall well being. Natrol...Quality Uncompromised.