Optimum Nutrition, Inc. (ON) is part of the Glanbia global nutrition group and has been setting the Gold Standard in sports nutrition for more than 30 years - helping performance focused athletes achieve their goals.


Company Owned & Operated Manufacturing

With state-of-the-art production facilities in Middlesbrough, UK, Optimum Nutrition 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.


Uncompromising Quality

Only raw materials of the highest quality are selected for Optimum Nutrition products, each one requiring certification to substantiate origin, biological make-up and conformance to food safety standards. Upon arrival at our manufacturing facility raw materials undergo further rigorous inspection & testing by our experienced quality assurance team to satisfy us that every ingredient meets our own exacting standards prior to release for production. Throughout the manufacturing process, our teams measure and record against multiple quality control points to deliver high standards of product quality & integrity at all times. Our Quality Assurance team add a further layer of independent inspection and auditing to assure Goods Manufacturing Practices (GMP) are sustained to provide end-to-end compliance with the Food Standards Agency (FSA) regulations and related legislation.

We’re proud to be a certified Informed Manufacturer, making us part of a global quality assurance program operated by LGC for facilities that manufacture and supply sports nutrition products and ingredients, developed to manage the risk of banned substance contamination.

It is for all of these reasons that Optimum Nutrition is the preferred Performance Nutrition supplier to Leinster Rugby and The Gaelic Players Association, as well as many more top flight sporting entities and athletes around the world. 


Driving Category Innovation

In addition to making Gold Standard 100% Whey the world’s best-selling whey protein powder, Optimum Nutrition created the slowly digesting protein category with Gold Standard 100% Casein. Optimum Nutrition also created the anytime energy category, which remains dominated by Essential Amino Energy, and launched the Optimum Protein Bar and the Protein Crisp Bar, the perfect on-the-go protein snacks.


Customer Satisfaction

Optimum Nutrition’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 Ireland in specialty retail stores, gyms and fitness centres as well as major grocery chains and online retailers and of course here direct from the brand you trust. Optimum Nutrition’s products are available across the globe.