The Pro range from Optimum Nutrition means that it is their most premium quality product.
So many mass gainers are cheap and nasty and often you get what you pay for with companies packing their mass gainers full of their lowest quality ingredients and fillers.
The ON Pro Complex Gainer is full of carbohydrates and calories so it can be used to put on muscle mass quickly when combined with a sensible diet and exercise.
If you struggle to put on muscle mass we recommend taking Pro Complex Gainer mixed with water twice a day or just take it mixed with water within 20minutes of finishing your workout to flush your muscles with much needed protein and carbohydrates.
Nutritional Panel: (Click to Enlarge)
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