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
8.3 out of 10 (23 Reviews)
2 Sizes
5 Lbs.
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4 Flavors
Cinnamon Bun
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Price: $47.99 ($4.36 / Serving)
Flavor Rating: 7.4

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

Overall Rating
23 Ratings
Verified Buyer Rating
13 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.
  • 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.

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.

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.

Verified Buyer
  • 9 Cinnamon Bun

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

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!

Verified Buyer
  • 1 Cinnamon Bun

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.

Verified Buyer
  • 1 Vanilla Ice Cream

Very sweet, by far the worst one ive tried

Verified Buyer
  • 8 Cinnamon Bun

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.

Verified Buyer
  • 10 Colossal Chocolate

Taste recomend !

Verified Buyer
  • 10 Cookies & Cream

Extremely impressed with yet another Gold Standard product! So happy to see them adding a mass gainer to their product line, not to mention their delicious Cookies & Cream taste and ease of mixability. I just went through my first bag and was happy with the results so far that I decided to order another two.I gained a few pounds within the the first few weeks of my strength training and can both see/feel the difference in my strength when compared to day one. I would highly recommend this product to anybody looking for a great mass gainer.

Verified Buyer
  • 9 Cinnamon Bun

I thought I'd leave a review of the Cinnamon Bun flavor since there aren't any here yet at the time of me writing this. I think the flavor is great, I'm a fan of anything cinnamon. This is one of the very few quality mass gainers available that use quality whey and complex carbohydrate sources as the primary ingredients of the gainer. The way you can tell what the primary ingredients of anything are by seeing what are the first couple of ingredients listed at the beginning of the product. Most gainers have maltodextrin listed as the first ingredient which spikes insulin levels in the body and really isnt the highest quality carb source to consume in a gainer. The only negative I have is that the serving size for this says 2 scoops, but one scoop is huge and probably the size of 2 scoops in of itself. 1 serving will not fit within a protein shaker cup you would have to take each scoop separately or put it into a blender. Kind of a small inconvenience but overall it's a good product. Mixes pretty well and doesn't clump too much if you shake it well.

  • 6 Colossal Chocolate
  • 9 Cookies & Cream

its pretty chunky when mixing in a blender bottle. Chocolate was the worst for me, but cookies and cream is really good.

  • 9 Vanilla Ice Cream

This was my first mass gainer and it's been the best. I tried a few after this (ON Pro Gainer, BSN True Mass 1200) but they haven't tasted as good as this one. This one has a slightly grainy, slightly oaty texture, and I love it – as opposed to the straight melted ice cream texture of the other two, which is kind of gross to slam that all at once. It's got quality ingredients and I feel the best when I take this after my workout. I usually do half a serving immediately after a workout and then another half serving a little later in the day (but let's be honest, 2 scoops for this is nothing compared some others where it's 4-6 scoops just for ONE serving), and that's been working out just fine for me. I can't speak for the individual power of this one specifically since I've been using it in conjunction with the two aforementioned gainers, but since I've started these (and upped my caloric intake admittedly), I've gained a solid 10 pounds at least, mostly of muscle too. I'd definitely recommend this for both taste and quality.

Verified Buyer
  • 10 Colossal Chocolate
Verified Buyer
  • 10 Colossal Chocolate

What's in Optimum Nutrition Gold Standard Gainer

Serving Size: 2 Scoops (203g)
Servings Per Container: 11
Amount Per Serving % Daily Value **
Calories 770       
Calories from Fat 100       
Total Fat 11 g 17%
Saturated Fat 5 g 25%
Trans Fat 0 g       
Cholesterol 70 mg 23%
Sodium 550 mg 23%
Potassium 600 mg 17%
Total Carbohydrate 112 g 37%
Dietary Fiber 6 g 24%
Sugars 12 g       
Protein 55 g 110%
Vitamin A 0%
Vitamin C 0%
Calcium 50%
Iron 10%
** 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, Natural And Artificial Flavor, Medium Chain Triglycerides, Creamer (Sunflower Oil, Corn Syrup Solids, Sodium Caseinate, Mono & Diglycerides, Dipotassium Phosphate, Tricalcium Phosphate, Soy Lecithin, Tocopherols), Lecithin, Ground Cinnamon, Flaxseed Protein, Salt, Milled Chia Seed, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Gum Arabic, 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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