Pro Complex Gainer Review
4.4Overall Score
Reader Rating: (2 Votes)

Pro Complex

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Pro Complex Gainer by Optimum Nutrition is a weight gaining shake formula that contains close to 700 calories, 7 different kinds of protein, few sugars and an abundance of complex carbohydrates. This sets the stage for muscle growth and weight gain. Let’s dive in and see how Optimum Nutrition’s Pro Complex Gainer stacks up against its weight gain competition.


Taste and Mixability:

For being a high calorie meal replacement shake, the mixability is actually really good with Optimum Pro Complex Gainer. You will have no problem mixing Pro Complex Gainer with a blender, shaker, or spoon. This is one of the easiest mixing weight gain products available.

The taste is also very good with Optimum Pro Complex Gainer. You will have the option to select 4 delicious flavors: banana cream pie, double chocolate, strawberry cream and vanilla custard.

The double chocolate is by far the most popular flavor, and its taste closely resembles a chocolate milk shake. The banana cream pie flavor is also very popular.


Weight gain and meal replacement formulas with high quality ingredients can be some of the best value buys in the supplement industry. The cost per serving of this product is between $2-3/£2-3 depending on where you purchase it. With over 600 calories and 60 grams of protein per serving – this is actually good value. You will be getting 7 kinds of high quality protein, complex carbohydrates and lipids, micronutrients, and even added vitamins. All this for the cost of a cheap fast food meal. When you compare this to the cost of regular whole food that has less protein and muscle building ingredients, it is a great price.

The best price we found for a 5.08lb tub was $41.50 at



Pro Complex Gainer is a highly effective muscle and weight gain formula. One major benefit to taking Optimum Pro Complex Gainer is the 7 different kinds of protein in each serving. This will give your body an abundance and wide range of muscle building amino acids that will initiate protein synthesis and help you pack on rock solid mass. With 65 grams of protien per serving – this is a highly effective muscle builder.

Pro complex gainer also contains 85 grams of complex carbohydrates per serving. Most of the carbohydrates that make up this formula are slower digesting – so they won’t spike your blood sugar and effect insulin levels.

Another bonus that makes this formula so highly effective is the addition of 26 vitamins and minerals.

Just one scoop of Pro Complex Gainer and your body has an abundance of protein, carbohydrates and vitamins that will all help your body recover and build muscle mass.


Side Effects:

Since this is a very high calorie dairy based product – some users may experience stomach discomfort. These side effects are rare and should subside once your body adapts to the formula.

For For

  • Perfect high calorie anabolic formula
  • 4 delicious flavors
  • 7 different kinds of protein
  • 85g of slow digesting carbs
  • 650 calories per serving

Against Against

  • Large serving size
  • Can be hard on dairy sensitive stomachs


Pro Complex Gainer – Our Verdict:

If you are looking for a high quality mass building shake to create a calorie surplus and initiate protein synthesis – Optimum Pro Complex Gainer is a fantastic choice.

With over 600 calories, 65 grams of protein and 85 grams of slow digesting carbohydrates – this formula works! Pro Complex Gainer is one of the highest quality weight gain formulas in the market due to its 7 different kinds of protein and addition of 26 vitamins and minerals.

Remember to look at today’s best deals for Pro Complex Gainer before parting with any of your hard earned cash!

Per Serving (1 heaped scoop):

Calories 620 
Calories from Fat 60 
Total Fat 7 g 
Saturated Fat 3 g 
Trans Fat 0 g 
Cholesterol 50 mg 
Total Carbohydrate 85 g 
Dietary Fiber 5 g 
Sugars 6 g 
Protein 55 g 
Vitamin A 1005 IU 
Vitamin C 23 mg 
Vitamin E 11 IU 
Thiamin 0.3 mg 
Riboflavin 0.65 mg 
Niacin 4 mg 
Vitamin B6 0.39 mg 
Folic Acid 79 mcg 
Vitamin B12 1.2 mcg 
Biotin 58 mcg 
Pantothenic Acid 2 mg 
Calcium 540 mg 
Iron 7 mg 
Phosphorus 330 mg 
Iodine 70 mcg 
Magnesium 125 mg 
Zinc 3.7 mg 
Selenium 10 mcg 
Copper 0.77 mg 
Manganese 0.78 mg 
Chromium 36 mcg 
Molybdenum 20 mcg 
Chloride 200 mg 
Sodium 350 mg 
Potassium 730 mg 
Boron 387 mcg 
Aminogen 100 mg 
Carbogen 100 mg 
Lactase 1mg 
(Standardized to 100,000 FCC Units/g)

Other Ingredients: Maltodextrin, Protein Blend (Whey Protein Isolate, Whey Protein Concentrate, Calcium Caseinate, Egg Albumen, Hydrolyzed Whey Peptides), Cocoa (Processed with Alkali), Lipid Blend (Medium Chain Triglycerides, High Oleic Sunflower Oil), Partially Hydrolyzed Guar Gum, Natural and Artificial Flavors, Vitamin/Mineral Blend (Maltodextrin, Vitamin A Palmitate, Beta Carotene, Ascorbic Acid, d-alpha Tocopheryl Acetate, Thiamin Hydrochloride, Riboflavin, Niacinamide, Pyridoxine Hydrochloride, Folic Acid, Cyanocobalamin, Biotin, d-Calcium Pantothenate, Calcium Carbonate, Tricalcium Phosphate, diMagnesium Phosphate, Ferric Orthophosphate, Potassium Iodide, Zinc Oxide, Selenomethionine, Cupric Oxide, Manganese Sulfate, Chromium Polynicotinate, Molybdenum Amino Acid Chelate, Boron Amino Acid Chelate), Lecithin, Salt, Sucralose, Acesulfame Potassium. Ingredients vary slightly with each flavor.

Allergen Information: Contains Milk, Egg, Wheat, and Soy (Lecithin).

Pro Complex