Optimum Nutrition, Inc. (ON) is part of Glanbia, a leading international cheese and nutritional ingredients group. ON owns and operates two premium sports nutrition brands, Optimum Nutrition and American Body Building (A.B.B.). Together, these brands provide active adults around the world with a comprehensive line of powdered, bar, tablet, capsule and ready to drink products.
Company Owned & Operated Manufacturing
With state-of-the-art production facilities in Aurora, Illinois; Walterboro, South Carolina and Sunrise, Florida, ON is one of the few sports nutrition companies to manufacture in every product category. From the very beginning in 1986, Optimum Nutrition has always taken a hands-on approach to maintaining the very highest standards of quality.
Before a single machine is turned on in our manufacturing facilities, ON procurement professionals carefully select the most premium raw materials. A Certificate of Analysis is required for every ingredient, which is then tested and retested for compliance. Quality assurance performs daily inspections of our current Good Manufacturing Practices (cGMPs) compliant facilities, which are Certified for Sport by NSF.
History of Innovation
In addition to making Gold Standard 100% Whey, the worlds’ best-selling whey protein, ON created the slowly digesting protein category with Gold Standard 100% Casein. ON also created the anytime energy category, which remains dominated by Essential Amino Energy.
ON’s strict ingredients selection, quality control, lab testing and manufacturing processes are all done for one reason: to provide you with the highest quality sports nutrition products available. Our company was founded with a mission to bring consistent quality to the marketplace, and we are constantly working on setting even higher standards.
Where You Can Find Us
Our products can be found throughout the United States in nearly 10,000 specialty retail stores, gyms and fitness centers as well as major grocery chains and drug stores. ON products are also distributed in over 70 countries worldwide.
For a complete listing of Optimum Nutrition products, visit the Products section of this website or request a free catalog.
Here at ON, we appreciate your feedback-whether something good or suggestions for improvement. Please feel free to give us a call at the number below or email us using the contact form to the right.
1-800-705-5226 We’re available from 8:30 am until 5:00pm Central Standard Time, Monday thru Friday.
- Emails sent during non-business hours will not be read until at least the next business day.
- Due to the volume of electronic mail that we receive, there are times when it may take a few days to receive a response from us. Your patience is appreciated.
Optimum Nutrition, Inc.
Attn: Consumer Affairs Dept
3500 Lacey Road
Downers Grove, IL 60515