Pro Gainer
Optimum Nutrition

Pro Gainer

Whey Protein Powder for Serious Muscle Gain*
Over 600 Calories and 60g of Protein and Complex Carbs to Get Big*
9.3  out of 10  (727 Reviews)
3 Sizes
10.19 Lbs.
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4 Flavors
Banana Cream Pie
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Price: $69.69  ($2.49 / Serving)
Flavor Rating: 9.0

Product Overview

Taste the Gains
Optimum Nutrition Pro Series
  • 60 Grams of High-Quality Protein to Help Kick-Start Recovery
  • 85 Grams of Carbohydrates to Help Restore Energy Levels
  • 650 Calories per Serving With Just 1 Gram of Added Sugar
  • 22 Vitamins & Minerals Because the Nutrient Needs of Very Active Individuals May be Greater Than Less Active People
Optimum Nutrition Pro Gainer
Pro Gainer At A Glance. What - Weight Gain Formula. Usage Occasion - After training or Between Meals. Training Support - Helps Build Muscle and Restore Energy Levels*

Ratings & Reviews

Overall Rating
727 Ratings
Verified Buyer Rating
410 Ratings
Average Flavor Rating
5 Flavors
Top Rated Flavor
Double Chocolate
By clicking the button above, you agree to entering the Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Dec 12, 2018
Verified Buyer
  • 10 Double Chocolate

Been using it for 3 years now mixed with 2 cups of 2% milk. I drink 3 a day and eat 2 real meals a day. Not sure if thats a healthy choice, but I dont get hungry often and Id rather drink my food, lol. When i first started taking it i was 135lbs 5'9'' 3 months later with everyday workouts i got up to 155lbs, abs still showing. a year after that 176lbs, abs kinda visible. Jan of this year, Stopped working out, still drinking the shakes, just 2 a day instead, since im no longer lifting everyday. Down to 161lbs. abs kinda visible.. I think its a good product, mixes well in a blender. Clumps in a shaker (maybe I had a crappy shaker?), clumps with the primitive spoon method. Would love if they came out with an everyday all day healthy meal replacement Id pay double!

Nov 02, 2018
Verified Buyer
  • 10 Double Chocolate

This is the second time I’ve used this product with great results. Last year during my bulking I used it for a few months and put on around 15 pounds. I just started my first bag this year and already have seen improvement and hope for similar results.

Sep 21, 2018
Verified Buyer
  • 10 Double Chocolate

Love the flavor Double Chocolate. Does not upset my stomach like some proteins do. Works great and is made in a great protien to carb ratio! Worth the extra money! Wish they made this in a Natural version!!

Sep 14, 2018
  • 9 Banana Cream Pie
  • 9 Double Chocolate

I'm very skinny,it helped me gain 11 kg in 3 months (from 49 to 60 kg).Great taste,high protein,low carb and pretty easy to mix with a spoon.

Aug 28, 2018
Verified Buyer
  • 10 Double Chocolate

This is my 2nd weight gainer i bought. The first one was serious mass. I honestly thought it was going to be thick like serious mass until i drank it and i was like omg, this is so smooth. I love how this weight gainer isn't thick and hard to swallow like serious mass. I would def order again.

Aug 16, 2018
Verified Buyer
  • 10 Double Chocolate

This stuff tastes great. Adds the calories you need after a workout and keeps you from getting hungry and cheating in the afternoon after my workout. It is a little hard to mix but really works.

Aug 11, 2018
Verified Buyer
  • 10 Vanilla Custard
  • 10 Double Chocolate

I tried Optimum's other mass gainer, the gold standard one, and it was way too sweet. This product tasted great. I also saw barely any progress while on the Gold Standard Mass Gainer but this one proved to be great. Amazing for hard gainers like me.

Jul 06, 2018
Verified Buyer
  • 10 Double Chocolate

Tastes very good, mix very good as well but waste 5kg bag and didn't gain any weight was 70kg still same. I was workout 4 days a week , didn't change my workout

Jun 21, 2018
  • 2 Vanilla Custard

6kg in a month!! i really loved it

May 23, 2018
Verified Buyer
  • 10 Banana Cream Pie
  • 10 Double Chocolate

My teenage sons (17/19) are hard gainers. They have had great success in making muscle gains and maintaining mass with the help of this product. We've used this before bedtime for over a year and will continue doing so. We mix on scoop with 10-12 oz water in a shaker...mixes all good have to be consistent with a good diet as well...this is a supplement if you're looking to gain mass.

May 17, 2018
Verified Buyer
  • 10 Banana Cream Pie

Tastes great, doesn't always mix well, but way better than other powders tried in the past. Banana cream pie tastes like artificial banana flavored milk when mixed with milk.Oh and takes longer to mix with a portable battery blender, or mixes even less with a hand shaker. I really like the strong artificial banana flavor so that's a plus to me.

Apr 27, 2018
  • 8 Strawberry Cream

Tastes alright, mixed relatively well given the large serving size. I was just disappointed in the amount of servings you get. I should have paid more attention to that, as 14 servings for $90 is a bit insane. That being said if you're willing to pay it I would recommend this. It's never been easier to take in 60 grams of protein.

Mar 28, 2018
  • 6 Vanilla Custard

very good product helps to put on mass tremendously but vanilla custard taste pretty bad I'm gonna buy a tub of double chocolate

Mar 15, 2018
Verified Buyer
  • 10 Double Chocolate
  • 9 Vanilla Custard

This is an excellent gainer that helped me quickly gain 20+ pounds of mass in a few months. It mixes in a shaker cup excellently. It’s a big scoop but one scoop and some milk and it doesn’t even come out overly thick. I don’t mix with anything just the powder and milk and take post workout or before bed depending on when I trained. I don’t eat like a bodybuilder and do not have a big appetite but this product helps me get 3500 cals a day in everyday with a minimal effort and I have put on a small amount of fat but the mass I’ve put on is quality and I credit this gainer for being the most beneficial thing I do along with counting cals/ macros on an app on my phone.

Mar 08, 2018
Verified Buyer
  • 10 Vanilla Custard

Every since i wanted to get bulky I read about pro gainer. But before that ON has never let me down so I tried to purchase it. Honestly vanilla is the way to go but i had gain gains as soon I killed the tub I purchased the bag. Sure feels like a rice bag. I totally recommend if your trying to get heavier on your weights as well weight but I got the serious mass too and it sure works good too. Keep doing well ON.

5.09 Lbs.
5.09 Lbs.
14 Servings | $2.96 Per Serving
9.1 Lbs.
9.1 Lbs.
25 Servings | $2.65 Per Serving
10.19 Lbs.
10.19 Lbs.
28 Servings | $2.49 Per Serving

What's in Optimum Nutrition Pro Gainer

10.16 Lbs. Banana Cream Pie
Serving Size 1 heaping scoop (165 g)
Servings Per Container28
Amount Per Serving
Calories 650       
% Daily Value *
Total Fat 8 g 10%
Saturated Fat 3.5 g 18%
Trans Fat 0 g       
Cholesterol 80 mg 27%
Sodium 390 mg 17%
Total Carbohydrate 85 g 31%
Dietary Fiber 5 g 18%
Total Sugars 6 g       
Includes 1g Added Sugars 2%
Protein 60 g 120%
Vitamin D 0 mcg 0%
Calcium 540 mg 40%
Iron 4.8 mg 25%
Potassium 350 mg 8%
Vitamin A 290 mcg 30%
Vitamin C 23 mg 25%
Vitamin E 5.3 mg 35%
Thiamin .3 mg 25%
Riboflavin .4 mg 30%
Niacin 4.2 mg 25%
Vitamin B6 .4 mg 25%
Folate 130 mcg 35%
Vitamin B12 1.1 mcg 45%
Biotin 58 mcg 190%
Pantothenic Acid 2 mg 40%
Phosphorus 330 mg 25%
Iodine 29 mcg 20%
Magnesium 125 mg 30%
Zinc 2.9 mg 25%
Selenium 12 mcg 20%
Copper .4 mg 45%
Manganese .8 mg 35%
Chromium 37 mcg 110%
Molybdenum 20 mcg 45%
Chloride 180 mg 8%
* The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
Maltodextrin, Protein Blend (Whey Protein Isolate, Whey Protein Concentrate, Calcium Caseinate, Egg Whites, Whey Peptides, Whey Glutamine Peptides), Lipid Blend (Medium Chain Triglycerides, High Oleic Sunflower Oil), Partially Hydrogenated Guar Gum, Natural And Artificial Flavor, Lecithin, Vitamin and Mineral Blend (Dimagnesium Phosphate, Calcium Carbonate, Tricalcium Phosphate, Maltodextrin, Ascorbic Acid, Ferric Orthophosphate, Molybdenum Amino Acid Chelate, D-Alpha Tocopheryl Acetate, Boron Amino Acid Chelate, Niacinamide, Zinc Oxide, Manganese Sulfate, D-Calcium Pantothenate, Selenomethionine
Pyridoxine Hydrochloride, Vitamin A Palmitate, Cupric Oxide, Chromium Polynicotinate, Thiamin Hydrochloride, Riboflavin, Beta Carotene, Folic Acid, Biotin, Potassium Iodide, Cyanocobalamin), Salt, Carbogen® Enzyme Blend (Maltodextrin, Amylase, Cellulase, Hemicellulase), Aminogen® Protease, Sucralose, Acesulfame Potassium, Lactase.
Contains: Milk, Egg, Soy, and Wheat.

Directions For Pro Gainer: Add 1 heaping scoop of PRO Gainer™ to 16 fluid ounces of cold water or milk in a shaker cup. Close tightly and shake until thoroughly mixed. TIP: By using an electric blender, you can stack this size supporting formula with fresh/frozen fruits, peanut butter, nuts, seeds and other nutrient-dense options. For best results, use in conjunction with a healthy, balanced diet and well-structured exercise program.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
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