Lief dedicates 25% of our staff to Quality Assurance & Quality Control. At Lief, your products are manufactured in accordance to the latest FDA cGMP guidelines and in compliance with 21CFR Part 111.

Lief partners with quality suppliers to receive only the best ingredients. We will only use suppliers that have been approved through our internal qualification process. In addition, Lief performs tests to certify and validate the nutrition facts and vitamin & mineral label claims are met and other hazardous elements, such as microorganisms, are not present. These tests are conducted on each raw material and all finished products. Testing is performed both internally and by reputable, qualified third party laboratories that have experience testing dietary supplements and understand our unique product requirements.

All of our products are made in the USA.