Gold Standard Gainer
Optimum Nutrition

Gold Standard Gainer

Whey Protein Powder for Massive Muscle Gain*
Delivering 760 Calories With 55 Grams Of Protein, And The Perfect Balance Of Protein To Carbs
8.0  out of 10  (28 Reviews)
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Product Overview

Gain the gold standard advantage

Beyond the Basics:

  • 55 Grams of Protein - Primarily From Isolate Sources
  • 760 Calories from Quality Ingredients
  • 2:1 Ratio of Carbohydrates to Proteins
  • 110 Grams of Carbs with Oat, Pea & Potato
  • 11 Grams of Fats from Flaxseed, Chia and MCTs
  • Easy Mixability

Optimum nutrition true strength

True Strength is a journey. It never rests, it never quits. It's about overcoming obstacles, accomplishing goals, and recognizing achievements. And then it resets to achieve again. As your trusted sports nutrition partner in goal achievement, ON demonstrates that same passion while crafting our products. From the raw materials we source to our state-of-the-art manufacturing processes, no compromises are made. You set the bar higher after every workout, we set the bar higher to redefine the industry standards and ensure you realize optimum results.


Optimum Nutrition has been spotting the efforts of goal driven individuals since 1986. As one of the few companies to operate state-of-the-art manufacturing facilities that are GMP compliant, ON assures that every shake will mix up effortlessly because of its first-to-market instantization process. You also expect each shake to taste the same as the last and your next. That's the kind of consistency ON delivers.


Gold Standard Gainer takes ON’s legendary quality to another level with a weight gain powder formulated for athletes who can benefit from greater physical size and strength. A healthy, balanced diet of food is the key to building a dominating physique, supplementing sensible food choices with quality proteins, complex carbohydrates and good fats in the form of an easy-to-mix shake can help ambitious athletes attain the physical presence they need to succeed in competition. Whether the challenge awaits you on the gridiron, diamond, field, court, ring or gym, Gold Standard GainerTM can fuel your nutritional needs in a very big way.

History & Heritage

Optimum Nutrition is legendary for both quality and innovation. In addition to producing the world’s best-selling whey protein, ON’s Gold Standard 100% Casein introduced slow-digesting nighttime protein to the weight training world and ESSENTIAL AMIN.O. ENERGY created the anytime energy category in sports nutrition. When technology makes advancements possible, ON will be the company bringing it to your shaker cup.

Gold standard GAINER at a glance


Ratings & Reviews

Gold Standard Gainer
Overall Rating
28 Ratings
Verified Buyer Rating
17 Ratings
Average Flavor Rating
5 Flavors
Top Rated Flavor
Colossal 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.
Jan 15, 2019
  • 9 Vanilla Ice Cream

everybody is talking about taste, when you pay more money on this thing you need to care the results. For me, it is good enough.

Jan 02, 2019
Verified Buyer
  • 10 Cookies & Cream
  • 8 Colossal Chocolate

I use it with milk and a little water so its not as thick. It wont taste good if you only use water. Both are great flavors but cookies and cream is on another level. Great ingredients, decent price. One of the better quality gainers out there.

Nov 15, 2018
Verified Buyer

The product I got is nearly expired. I have to consume all of this 3.25 kg bag of protein in 5 month. Although I may be able to finish it all before its expiration, it is not appropriate to sell customer nearly-expire-products(and there is no discount for this). In addition, I have never bought any protein shakes that are this hard to dissolve in cold water (don't know if it's because it's near to expire). Bad experience overall.

Aug 02, 2018
  • 9 Colossal Chocolate
  • 8 Cookies & Cream

Truth be told i love it flavor wise. I usually make a brownie our of it in a microwave in 50 seconds. I like the profile. And isolate as main source with malto as least to enchance the absorption. However, i just finished mt 2nd 10lb bag and i was lean but ir didnt help me enough to put some pounds, sure maybe i was eating less than i need. BUT, iam perfectionist and precise when it comes to nutrients. Its pricey for its price. I figured. I can hit same amount of nutrients and calorie ratio with real food and less cheaper. But if we are talking about flavor and profile wise. I love it.

May 27, 2018
Verified Buyer
  • 10 Colossal Chocolate

Amazing product. Yes it is expensive but the ingredients are so clean compared to other mass gainers. I take 1 scoop post workout and can already feel the difference. The texture and taste of the Colossal Chocolate are both on point. I will definitely be ordering more again.

May 09, 2018
Verified Buyer
  • 10 Cookies & Cream

great flavor, not too sweet and not too creamy, great product.

Jan 05, 2018
  • 7 Colossal Chocolate

I started off using ON Pro Gainer and absolutely loved it. I ran out quick and didn't order more in time so I grabbed a bag of this at a well know nutrition joint. The bottomline is that you are getting the calories you need but you need two massive scoops to get what you get with ON Prog Gainer with just one scoop. This bridged me to my next bag of ON Pro Gainer that I just got from the other day. Again bottomline is you get what you need but you drop down in quality some what if you are used to using ON Pro Gainer and with this you can save a few $$. I would do it again if needed but I am in bed with ON Pro Gainer, love it.

Oct 16, 2017
Verified Buyer
  • 10 Colossal Chocolate
  • 9 Cookies & Cream

Disclaimer: I workout first thing in the morning, 5 days a week. On deployment so I eat whatever is being served. Also take Gold Standard Whey 3x a day, C4 Ultimate, and one serving of quadra lean. I ordered a bag of colossal chocolate along with a 45oz shaker. My biggest concern about starting a gainer was the mixability since I don't have a blender or anything out on deployment. I was pleasantly surprised that I was able to get everything broken down within my shaker (no blender ball). The taste took me by surprise. Rather than other chocolate shakes I've tried, this one tasted like chocolate cake batter or brownie batter, can't really complain about that. I just used an 18oz bottle of water so it was pretty thick and tough to put down. After 10lbs of this, I have noticed my physique has filled out a little more which I'm happy with. I've also been able to keep my body fat in check while on this. Unfortunately, I can't comment on my weight since we don't have a scale out here. I'll stick with this for a couple of months and see how I'm doing in terms of strength gains. I just started a bag of cookies and cream and it mixes way easier than the chocolate does, nowhere near as thick. The taste isn't as bold as the chocolate, but this is probably the closest cookies and cream flavor I have ever tasted in a supplement. I was a little bummed this is down 4g of fiber and a few other things that the chocolate has.

Oct 02, 2017
Verified Buyer
  • 2 Cookies & Cream

The cookies and cream taste ******* awful wtf. that was a waste of money on that ******* flavor other then that the product works.

Jul 01, 2017
Verified Buyer

This protein dissolves well in the shaker. And I have gone up about 10lbs in size since using this product.

May 11, 2017
Verified Buyer
  • 10 Colossal Chocolate

The best flavour I`ve have ever taste. Already tought all the chocolate flavours from optimum above average but this Colossal Chocolate is the best ever. Highly recommend the product, nice levels of Carbs, proteins and minerals, it`s a top weight gainer with a flavour that looks like u´re drinking some chocolate milk!

Apr 28, 2017
Verified Buyer

I have tried multiple mass gainers such as Serious Mass, Pro Gainer, and this Gold Standard Gainer. Yes this one was the hardest one for me to keep down. The Flavor Cinnamon Bun did not taste well. I drank it with just water on its own and I couldn't finish a whole serving so I tried mixing it with other protein powders which helped a little but I still did not like the taste. Would try again with another flavor to see if it's any better but would also recommend Pro Gainer instead.

Apr 10, 2017
Verified Buyer
  • 1 Vanilla Ice Cream

Very sweet, by far the worst one ive tried

Feb 23, 2017
Verified Buyer

I like the flavor, but holy cow is the serving scoop size huge. I have a 32 oz shaker bottle and it still was as thick as pudding. Going to split it up into two separate servings. Overall, tasted good and will allow me to get my extra protein/carbs in while on the go for breakfast.

Feb 17, 2017
Verified Buyer
  • 10 Colossal Chocolate

Taste recomend !

2 Sizes
5 Lbs.
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2 Flavors
Colossal Chocolate
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Price: $60.99  ($5.54 / Serving)
Flavor Rating: 9.6


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Delivering 760 Calories With 55 Grams Of Protein, And The Perfect Balance Of Protein To Carbs

What's in Optimum Nutrition Gold Standard Gainer

Serving Size: 2 Scoops (203g)
Servings Per Container: 11
Amount Per Serving % Daily Value **
Calories 760       
Calories from Fat 90       
Total Fat 10 g 15%
Saturated Fat 6 g 30%
Trans Fat 0 g       
Cholesterol 70 mg 23%
Sodium 480 mg 20%
Potassium 1,200 mg 34%
Total Carbohydrate 112 g 37%
Dietary Fiber 8 g 32%
Sugars 12 g       
Protein 55 g 110%
Vitamin A 0%
Vitamin C 0%
Calcium 50%
Iron 40%
** Percent Daily Values are based on a 2,000 calorie diet. Your Daily Values may be higher or lower depending on your calorie needs.
Protein Blend (Whey Protein Isolate, Whey Protein Concentrate, Milk Protein Isolate, Hydrolyzed Whey Protein Isolate), Carbohydrate Blend (Oat Flour, Pea Starch [Carb10®], Potato Starch), Maltodextrin, Cocoa (Processed With Alkali), Medium Chain Triglycerides, Natural And Artificial Flavor, Lecithin, Flaxseed Protein, Salt, Milled Chia Seed, Gum Arabic, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Sucralose.

Directions For Gold Standard Gainer:

BETWEEN MEALS: Mix up 1 scoop of Gold Standard Gainer between meals to help support a high calorie diet. 

POST WORKOUT: Mix 1-2 scoops of Gold Standard Gainer in 10 - 20 fl oz of milk or water 30 - 45 minutes following exercise to support maximum recovery. 

BEFORE BED: Mix up 1 scoop of Gold Standard Gainer about 45 - 60 minutes before bed to help muscles recover while you sleep. 

For healthy adults, consume enough protein to meet your daily protein requirements with a combination of high protein foods and protein supplements throughout the day as part of a balanced diet and 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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