Pro Complex Gainer by Optimum Nutriiton - High Protein Gainer!

Optimum Nutrition is the highest selling sports nutrition brand, in the WORLD. Marketing aside, there's a reason they sell more than everyone else; their products are legendary! Here at Genesis, we love the entire Optimum Nutriiton range; their Gold Standard and PRO lines set the benchmark for all products, and when it comes to putting on muscle, ON has got your back!


What is Pro Gainer by Optimum Nutrition?

Now stocked at Genesis Nutrition, Pro Gainer by Optimum Nutrition is a premium mass gaining formula which skips out on all of the junk! Unlike other gainers which generate calories through cheap filler compounds, Optimum Pro Gainer derives a high percentage of its calories from protein-7 premium sources. It also supplies complex carbohydrates, digestive enzymes, vitamins & minerals, fiber and medium chain triglycerides (MCTs), all in a single serve!


How does Optimum Nutrition Pro Gainer Work?

Pro Gainer contains 650 calories per serve, of which 60g are protein, 85g are carbohydrates and 6g are fat (double chocolate). The Genesis approved proteins in this product, including whey protein, casein and egg albumen, are highly bioavailable, allowing for rapid absorption and limited wastage. Rather than drawing its calories from simple sugars, Pro Gainer includes a high quality maltodextrin and contains an impressive amino acid profile which includes important vitamns and minerals.


What are the benefits of taking Pro Gainer?


  • Ultimate LEAN GAINER Formula 

  • Easy to Drink

  • Mixes Effortlessly with a Blender, Shaker, or Spoon

  • High Protein to Carb Ratio

  • 7 Superior Proteins Including Whey, Casein, and Egg

  • Few Sugars

  • 650 Calories


Our Thoughts:

Genesis recommend Optimum Nutrition Pro Gainer to a lot of our customers looking to put on muscle. Many mass gainers will help you get big, but will also get you fat. Pro Gainer is a cleaner alternative; low in sugar, low in fat and high in clean carbs and protein.


Where can I buy Pro Gainer by Optimum Nutrition?

Here at we stock the entire Optimum Nutrition range of products. Below we have included a list of items that include Pro Gainer and an assortment of other Optimum items available for purchase with us online.


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*PLEASE NOTE: There's no guarantee of specific results and the results can vary from individual to individual. All information provided by us on the Website or on or in respect of any Products is provided by us as general information and is not in the nature of advice. We reserve the right to update or otherwise change this information at any time. This website makes no representations, warranties, covenants or guarantees of any kind, express or implied, as to the quality, suitability, accuracy or completeness of any information, content, service, or merchandise provided through this website.To the full extent permissible by applicable law, Seller disclaims all express or implied conditions, representations and warranties, including but not limited to, any implied warranty of merchant-ability, non-infringement and suitability for a particular purpose.