









💥 Bulk smarter, recover faster, and never miss a gain!
Optimum Nutrition GS Pro Gainer is a premium weight gainer protein powder delivering 650 calories, 60g of multi-source protein, and 85g of carbohydrates per serving. Enhanced with 32 vitamins and minerals including immune-supporting Vitamin C and Zinc, it’s designed for active adults aiming to build lean muscle mass efficiently. Available in a convenient 5.09-pound tub, it mixes effortlessly and supports post-workout recovery or high-protein meals between sessions.






















| ASIN | B0015R3A1S |
| Age Range Description | Adult |
| Allergen Information | Milk, Soy |
| Best Sellers Rank | #11,222 in Health & Household ( See Top 100 in Health & Household ) #9 in Sports Nutrition Weight Gainers #1,167 in Sales & Deals |
| Brand | Optimum Nutrition |
| Brand Name | Optimum Nutrition |
| Color | No Color |
| Container Type | Bag |
| Customer Reviews | 4.6 out of 5 stars 4,008 Reviews |
| Diet Type | Kosher |
| Dosage Form | Powder |
| Flavor | Double Chocolate |
| Global Trade Identification Number | 00748927029710 |
| Item Dimensions | 8.06 x 8.06 x 11.18 inches |
| Item Form | Powder |
| Item Height | 11.18 inches |
| Item Weight | 5.09 Pounds |
| Manufacturer | Optimum Nutrition - NutWell |
| Material Features | Sugar Free |
| Model Name | GS - Pro-Gainers Weight Gainer - Protein Powder |
| Number of Items | 1 |
| Primary Supplement Type | Vitamin C |
| Product Benefits | Muscle Growth, Weight Gain |
| Total Servings Per Container | 14 |
| UPC | 748927029710 |
| Unit Count | 81.44 Ounce |
D**N
High quality calorie gainer / meal replacement
As an amateur/hobby bodybuilder, this single product has become a staple in my diet over the past 3 years. When I started getting serious about lifting again out of college, I had dropped to 145lbs from my previous high of 175lbs. My metabolism is fast, and I simply had trouble keeping up for a number of reasons: time, money, and the difficulty eating the calories I needed in solid foods. I then found this product, which has helped all three of those issues. VALUE - At approximately $2.25 a serving (when using subscribe and save), this is one of the cheapest quality 650 calorie meals you can provide your body with. I found this to be much more cost effective than trying to put together my own meal. Thanks to Amazon's subscribe and save, the prices compete with the other bigger online supplement retailers and I don't have to worry about re-ordering. PERFORMANCE - I can drink an entire serving in 2-5 minutes without feeling bloated/sick (taste ranges from acceptable to good - banana cream and vanilla are must tries). I have one serving every morning, and one at some point after my workout and before bed. This accounts for 1300 of my 3500 daily calorie intake. For me, without the aid of liquid weight gainers - it would be impossible to achieve my calorie goals and gain lean mass. I especially would struggle in the morning -- I often don't have time to prepare a good meal, and have trouble eating too many solid foods first thing in the morning. Also - understand that while 60 grams of protein a serving may seem like too much, this is not 60 grams of pure whey protein that is metabolized very quickly. It is packed with 7 sources of protein (faster and slower metabolized proteins) so it takes several hours for your body to metabolize the protein. RESULTS - When used with a high quality, high calorie diet and proper lifting routine - this product can help you achieve your daily calorie requirements and consequently gains in lean mass. I have used this product to raise my weight from 145lbs to 187lbs while keeping body fat under 8%. Highly recommend this product over cheaper gainers with more sugars/poorer quality calories. FYI - If you have the time, I recommend following the blending instructions provided. However, if you are short on time - a shaker bottle is best. The blender mixes the product so well, that it will take you 2-3x longer to drink since the volume of product is increased just due to being "frothy" from the blender. While the blender taste cannot be beat (and less water can be used to get good mixing results), a high quality shaker bottle does work well for this stuff as well with 20-40 seconds of shaking and the correct amount of water. You sacrifice taste for a shake that takes less time to drink.
B**G
Great product
Excellent protein powder that’s helped me put on extra pounds to build muscle. I use it daily and really enjoy the taste. One container lasts a little over a month, making it a solid value. Recommended
K**T
SO GOODD!
Usually never do reviews but this weight gainer is pretty good. I'm 5'7 and started at 149lbs and now I'm at 155/156lbs Pros: -Saw about 8lbs of weight gain over almost a month which is good if you want a lean bulk, if you want to gain weight fast this is not the protein powder for you. -I'm a lot less sore from my workouts. I train as a power lifter and I've noticed significantly decreased DOMS. -minimal bloating and discomfort -The taste is really good. I prefer the vanilla though because it is easier to mix with other flavors. Cons: - Slow weight gain (again not meant to bulk you up fast but slow ,steady, and lean which in the long run is better so you have less fat to cut) -You should weigh your portions, the cup they provide will definitely not get you the serving size.
J**H
Gains are great!!
BEST gainer ever!! I really recommend it!! Flavor is great and gains are awesome!dissolves easily ,energy Level is great..I combine it with monohydrate creatine by ON,it’s a great combination and of course with a good diet,works for me,but every body is different,Try to buy specific from the ON store,it is more secure that you going to get what u pay for.
P**Y
Awesome Product
I have been using Optimum Nutrition Pro Gainer for a few months now, and I must say, it has exceeded my expectations as a muscle-building supplement. This review is based on my personal experience, and I believe it deserves a solid four-star rating. I’ve managed to with workouts to increase my weight from 195lbs to 220lbs. First and foremost, the taste of this protein powder is outstanding. I have tried various flavors, and each one has been delicious. Whether it's chocolate, vanilla, or strawberry, the Pro Gainer always delivers a satisfying and enjoyable experience. I appreciate that Optimum Nutrition pays attention to the taste, as it can often be a struggle to consume protein shakes consistently. With Pro Gainer, it is easier than the standard protein shake. The nutritional profile of Pro Gainer is impressive. Packed with high-quality proteins, complex carbohydrates, and healthy fats, it provides a balanced blend of macronutrients that are essential for muscle recovery and growth. I found that this supplement helped me meet my daily caloric and protein intake goals, making it easier to fuel my workouts and promote muscle gains. The added vitamins and minerals are also a bonus, contributing to overall health and well-being. Mixability is another area where Pro Gainer shines. Unlike some other protein powders I've tried in the past, this one dissolves easily and smoothly in both water and milk. No clumps, no gritty texture—just a creamy and consistent shake every time. This is especially important for me when I'm on the go and need a quick and hassle-free option. I’d rate its dissolvability as average to above average in a shaker, but have been using a turbo mixer for better results and consistency. The only reason I deducted one star is the price. Optimum Nutrition Pro Gainer is definitely on the pricier side compared to other mass gainers on the market. However, considering the quality of the ingredients and the results I've seen, I believe it's worth the investment. The cost might be a deterrent for some, but if you prioritize quality and effectiveness, Pro Gainer delivers on its promises. In summary, Optimum Nutrition Pro Gainer is an excellent choice for anyone looking to build lean muscle mass and support their fitness goals. With its fantastic taste, impressive nutritional profile, and superior mixability, it stands out among its competitors. While it might be a bit more expensive, the results make it worth every penny. I highly recommend giving it a try and experiencing the benefits first-hand.
J**S
Excellent Protein for Clean Bulking
Once again, Optimum Nutrition has a winner. To give you an idea of my lifestyle so you can make a comparison, my style of weight-lifting, eating, etc. is more of a "clean-bulking" program. Many will say the concept of the clean bulk is a myth, but I've done it. Is it perfect? Nah, but it works for me. I watch my diet all the time but am no calorie-counting zealot. I exercise every day of the week with five weight lifting sessions and three half-hour interval training cardio sessions (one day is combined of course). I am 5'6" and weigh 138 lbs with about 7% body fat. I am no expert on fitness but I've made it to where I am and I'm proud of it. So this review won't be the most scientific post on Amazon. First off, this is a GAINER protein. I will say that again because it merits repeating. GAINER. Despite it being visible in gigantic green letters on the package, and in the name, and in the description, I am sure some people managed to glaze over this. This is a higher calorie protein while being lower in fat, sugars, etc. so lean mass can be put on. You will put on some great muscle growth if used appropriately with exercise and proper diet. Despite the fact it's a lean gainer, some loss in definition is inevitable. Not all of those calories will go straight towards building muscle mass alone. I have been using this protein since November 2013 and I have seen some great improvements in my muscle gains and my strength shot through the roof. I am sure having the extra calories from the protein to increase muscle growth attributed to those results. Now I did experience some minor loss in definition with this protein since it is after all a GAINER; even with my constant clean diet not all of the calories went straight to my muscles some of it inevitably went to my fat reserves, particularly around the mid-section of course, but the loss in tone was minor. All in all I am thrilled with the results that this protein gave me and how much it bulked up my muscles with such little change to my "aesthetics" so to speak. The protein tastes fine. I am so sick of seeing "THIS PROTEIN DOESN'T TASTE LIKE CANDY. ONE STAR. THIS IS GROSS DO NOT BUY." If you want a candy like taste then go eat chocolate. This is a protein. If it has all the sugars and flavor additives then guess what? It defeats the purpose. Is it the best tasting one I've had? No, but I don't really care. It did it's job and that's what matters. I highly recommend this protein if you're looking to increase muscle mass without adding as much "other mass" AKA lean mass. The price is also a steal for 10 lbs. Pro Tip: If you open the box they ship it in with a knife, be careful. I learned the hard way.
B**N
Great Product! Gained 4lbs in first 2 weeks.
OVERVIEW: I've always been at a constant weight for the past 5 years hanging around 150lbs. Before I started taking this about 2 weeks ago, I weighed 150lbs. I was doing one of those Kris Gethin muscle mass workouts for about 2 weeks in as well taking pretty much just Whey as my supplemental protein. I began taking the Pro Complex Gainer twice a day with 1 shake right in the morning and 1 before bed. I found this has helped buffer my entire day with constant protein intake. This is where it helped me the most. I had a hard time hitting those ridiculous 3000 calorie marks while trying to eat just brown rice and chicken, but adding in 2 shakes brought me almost half way there. I ate normally throughout the day as this stuff doesn't sit heavy in your stomach. I found this a huge plus since I hate that bloated sluggish feeling. So that left me with 1800 calories to get to which isn't terribly difficult as I'm eating yogurt, brown rice, nuts, and chicken throughout the day. And on training days, I'll have 1 pre-workout shake and 1 post-workout shake containing protein so I would surely hit my protein marks by this time. TASTE: This is by far the tastiest of the protein drinks I've had without having to mix in fruits and yogurt and what not into it. Double Chocolate flavor is a must. PERFORMANCE: I'm at 154lbs in just 2 weeks and mostly in muscle gains so I'm excited to see where this takes me. COST: This stuff can get costly since I noticed that you supposedly need about 5 regular scoops of what you use from the Whey Protein tub to make up just 1 serving of this stuff! The scoop for this protein is like a SHOVEL. I don't even understand how you can scoop this stuff out and pour it into any cup. So I end up using the extra plastic scoop from my other whey protein to get this stuff into my bottle. Given the large serving size, I'm 3/4 done with my tub so I will likely need to buy the 10lb bag next time.
Y**A
Proteína
Muy buena, great taste
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