Optimum Nutrition Pro Complex Gainer, Double Chocolate, 5.09 Pounds

Optimum Nutrition Pro Complex Gainer, Double Chocolate, 5.09 Pounds

Optimum Nutrition claims to have the ultimate lean gainer formula with their Pro Complex Gainer. This formula combines 7 proteins, including whey, casein, and egg, which delivers recovery to the body over a long duration (by using both fast-release and slow-release). Optimum Nutrition holds themselves to a standard of quality that ensures they deliver a gainer that’s made up of the best stuff possible so that consumers don’t just get fat, they get the muscle mass that they want. This is another all-in-one gainer along the lines of MHP’s Up Your Mass and Cyto Gainer.

Nutritional Info

A serving of Pro Complex Gainer is one heaping scoop (roughly 165g). In that serving, you get 650 calories that break down into 8g of total fat (4g saturated), 85g of carbohydrates (5g dietary fiber and 6g sugar), and 60g of protein (pulled from their 7 sources). This formula also includes a vast number of vitamins that range from 10%-50% of your recommended daily value. If taken twice a day, as recommended, this product would give you an extra 1300 calories a day alone, more if you mixed it with whole milk or peanut butter or other such foods.Optimum Nutrition draws attention to the fact that they supply complex carbohydrates, dietary fiber, medium chain triglycerides, digestive enzymes, vitamins, and essential minerals, all with great taste.Their ingredients include maltodextrin (the standard sugar sweetener for gainers, the very thing that Carbo Gain is selling in their product), the blend of seven proteins, and a lipid blend. One more ingredient to be aware of is sucralose. The levels of sodium and cholesterol remain low in this product, further attesting to its quality.


User reviews point to Optimal Nutrition having put forward a strong product that is highly effective. Other perks include that this gainer is easy to digest, mixes well, and tastes good. Ultimately, a lot of the reviews contribute to the idea of this product working particular well for skinny people who have trouble with putting on weight of any kind. A few concerns illustrate the fact that most people’s definition of a heaping scoop does not yield the full 165g, but that is easily remedied by using a food scale to simply measure out the 165g if you’re looking to keep precise track of calorie intake. Overall, however, the results cannot be disputed; this product will help you gain weight.

The Difference

Optimum Nutrition’s entry in the weight gainer category has more fat than Cyto Gainer, but less than Up Your Mass. The carbohydrate and protein content is similar, though only Optimum Nutrition works from seven different types of proteins. One benefit of using so many protein types is that some people see better results using one type rather than another, and including all of them means one is bound to work optimally in your body. Like Cyto Gainer, Optimum Nutrition also wears the NSF badge that assures consumers and athletes everywhere that their ingredients are certified and all legal for any professional sports. In more dedication to quality assurance, Optimum Nutrition has also established and put into effect a Hazard Analysis Critical Control Point program to diminish any chance of contaminants in the products, which should ease buyers’ minds.


Optimum Nutrition’s Pro Complex Gainer is the gainer for you if:

  • You need to increase your calorie intake.
  • You still want to take a separate multi-vitamin (the levels don’t go high enough to satisfy all the daily values which leaves room for further supplementation).
  • You want quality ingredients and impressive results and are willing to pay the price.

Pro Complex Gainer might not be for you if:

  • You want a gainer that will eliminate the need for multi-vitamins (MHP’s Up Your Mass will do that).
  • You want a supplement that includes creatine.
  • You’re trying to save money.

The Bottom Line

Maximum Nutrition’s gainer is another solid entry in the field of mass gaining formulas. Their standard of quality is as high as it gets. The fiber and easy-to-digest protein forms go down easily and don’t keep you too full, an important aspect when considering that you still need to eat all of your other meals in order to build mass! Unless you’re looking for other additives that this product doesn’t provide, there’s no good reason to pass up Pro Complex Gainer. It has an overall score of 4.4/5, making it the highest reviewed product on this list.