Optimum Nutrition (ON) is one of the most recognized sports nutrition brands worldwide, known for consistent quality and long-standing bestsellers—especially Gold Standard 100% Whey. ON highlights strict quality standards and in-house manufacturing control across its process, from sourcing to testing and packaging.

Among ON’s most popular products, Gold Standard 100% Whey is positioned as a flagship protein option (with protein isolate commonly listed as the first ingredient on certain versions/markets).
For weight gain/bulking, Serious Mass is a well-known gainer line, described as providing very high calories per serving with protein and carbohydrates.

On Qimia Oman, you can shop original Optimum Nutrition products online with clear product-page details (servings, directions, ingredients, and availability). Qimia also offers one of the largest online supplement catalogues in Oman (500+ products across many brands), plus fast delivery (business days) and free shipping available on qualifying orders depending on cart value and location.