While our products are safe and of the highest quality – they are formulated to be used by healthy and active individuals. We advise anyone who has a medica...

While our products are safe and of the highest quality – we advise anyone who is pregnant or breastfeeding to check with their healthcare professional befor...

If there is an outbreak in any dairy farm supplying Glanbia we are immediately notified by the Dairy inspectorate of the Department of Agriculture. There is...

Creatine monohydrate is is widely recognized as the most effective ergogenic nutritional supplement currently available to athletes in terms of increasing h...

Sweeteners are used in foods to provide zero to reduced calorie options to sweeten foods compared to sweetening with sugar or fructose. The EU Commission re...

Optimum Nutrition has more than 30 years’ experience of working with elite athletes and teams.  All of Optimun Nutrition’s powders, bars and supplement pro...

All of Optimum Nutrition’s powders, bars and supplement products are manufactured at our own Glanbia Performance Nutrition facility in Middlesbrough, Englan...

Yes, it is safe to take Serious Mass and Creatine together.

We would recommend that someone with any type of medical condition refer to their medical advisor before taking any of our supplements. 

There is currently no clear research in humans suggesting any of the negative health impacts, whilst there is some research suggesting positive health outco...