Review Graph
Top Rated Flavors
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Most Recent
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Most Helpful
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All Reviews (665)
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Verified Buyers (632)
Kelly
Verified Buyer
One of the best mass gainers on the market. Definitely up there. Very trustworthy and efficient*
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Kelly
Verified Buyer
One of the best mass gainers on the market. Definitely up there. Very trustworthy and efficient*
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Sean Y
Build Muscle
Verified Buyer
Really like flavor mixes great. Delivery time was on point. We definitely be ordering again from Muscle and Strength. Thank you..*
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Tony A
Build Muscle
Verified Buyer
Excellent brand, great sale highly recommended for extra calories to gain weight. *
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fritzson E
Burn Fat
Verified Buyer
"I’ve been using Optimum Nutrition Serious Mass and it’s been a game changer. Great for bulking up with solid calorie and protein content. Tastes good, mixes well, and helps with recovery. I gained weight steadily without feeling bloated. Definitely a top pick for hard gainers!"*
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Mariya M
Build Muscle
Verified Buyer
I love this product, Banana or Vanilla are my go to flavors due to being able to mix them with multiple things.*
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Q user
Verified Buyer
I got the vanilla flavor. There is a little artificial aftertaste.*
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Jerrt1
Build Muscle
Verified Buyer
Mixes well, great taste and quick delivery. Site is easy to navigate.*
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Mike
Increase Strength
Verified Buyer
I always chooses this flavor and this particular mass gainer for it is very easy to mix and consume. No lumps etc.*
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Amady samba S
Build Muscle
Verified Buyer
Gained mass. Awesome. Tastes good and easy to drink. I ordered again*
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Mike
Increase Strength
Verified Buyer
This one is my favorite. Been using it ever since the first time buying it.*
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Scott W
Build Muscle
Verified Buyer
Great product, I take it as a protein by using a standard protein scoop (2scoops), (not the huge laundry scoop included). It has the perfect protein to carb ratio for building lean muscle, I mix with water, ice and a dab of PB Fit powder peanut butter and a teaspoon of instant coffee grounds. Taste amazing!!!*
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Sagnik S
Build Muscle
Verified Buyer
It is really an amazing product. As a working class individual hitting the gym everyday, it is a must product for the proper protein intake day in and day out.*
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Reda S
Build Muscle
Verified Buyer
One of the Best Mas gainers with no doubt good stuff and great Quality for anyone who wants to gain mass*
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Mike
Increase Strength
Verified Buyer
Easy to mix and easy to consume in my point of view. The Flavour is amazing.*
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rock
Build Muscle
Verified Buyer
Good experience with serious mass gainers; gained about 8 pounds in two weeks.*
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Ali D
Verified Buyer
Best brand best quality. I can see the changes. I git 3 kgs in a month and a half*
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ELIT FITNESS
Verified Buyer
Between the others articles that I Bought, it is the best one*
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Kurt F
Verified Buyer
Great mass gainer for those who struggle to put on weight. I do half serving with oatmeal banana and peanut butter and milk. Works great.*
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Orrion B
Verified Buyer
This has been one of the most beneficial gainers I’ve tried. Very flavorful.*
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Ricardo P
Build Muscle
Verified Buyer
It is a classic classic from a leading brand. I love Optimum Nutrition*
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Ricardo P
Build Muscle
Verified Buyer
I take it daily, it is a friend to keep you at the desired weight*
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Ricardo P
Build Muscle
Verified Buyer
I love Optimum Nutrition. This product is the best in mass gainer*
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Bodybuilder Mami
Increase Strength
Verified Buyer
Looking to put on size quickly, this is a great item. Mixes well with water or almond milk *
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Kevaughan G
Verified Buyer
great tasting whey protein that mixes easily in water or the beverage of your choice. *
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Mike
Increase Strength
Verified Buyer
Very tasty and easy to consume. I really do like this product and I would recommend it to anyone who is looking to gain mass.*
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Orrion B
Verified Buyer
I truly wish I’d have started using this long ago. Perfect if you need to put on some weight.*
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Wade H
Verified Buyer
Amazingly delicious. Want weight? Take Serious Mass! Worth every penny *
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Kelly
Verified Buyer
One of the best mass gainers on the market. Definitely up there. Very trustworthy and efficient*
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Kelly
Verified Buyer
One of the best mass gainers on the market. Definitely up there. Very trustworthy and efficient*
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Kurt F
Verified Buyer
One of the best weight gainers on the market. Packed with carbs for that hard gainer type person.*
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Orrion B
Verified Buyer
Tried this one out about 3 months ago and swear by it. Solid product..*
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Ravi B
Verified Buyer
One of the oldest mass gainer out there... First time I used this I felt gains*
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Bodybuilder Mami
Increase Strength
Verified Buyer
My female client went from 117 to 137lbs in a year. This along with her strength and conditioning program really transformed her body.*
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Orrion B
Verified Buyer
Perfect flavor. I subscribed to Optimum Nutrition recently and I’m sold.*
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Kelly
Verified Buyer
One of the best mass gainers on the market. Definitely up there. Very trustworthy and efficient*
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DenM
Verified Buyer
I use this product mainly for making homemade protein bars. As a shake it's good, but can be thick with the reccomend scoops.*
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Ravi B
Verified Buyer
A mass gainer that never lets down.... pack on that additional weight thats neededl...*
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Samuel H
Verified Buyer
One of my all-time high favorite favors of serious mass gainers. I can literally drink it all day!*
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Jean Paul F
Transformation
Verified Buyer
The Strawberry flavor is the best I have ever had. When it comes to the product, having to do 2 big scoops every time is not really what I was looking for. It can be a bit too much for your stomach to handle. However, that is the whole point of a mass gainer. Just not for me. But I recommend it if you do a lot of exercise and eat a healthy diet.*
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Patrick G
Verified Buyer
It works well the results are good,but not so much the flavor*
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ZACHARIAH T
Verified Buyer
ON is my go to as it's not chunky and the peanut butter chocolate is my favorite*
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Mahmoud Z
Build Muscle
It's so far away from strawberry flavor besides it doesn't isolate well. May be it's near expired*
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Hassan S
Verified Buyer
It’s as expired product
Please check before you sell anything *
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Giovanni E
Verified Buyer
Great product and mixes really well with anything. I personally hate vanilla and did not realize until it arrived.*
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Tariq A
Build Muscle
Verified Buyer
I love this product.
It was delivered fast, perfect product.*
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Joe C
Verified Buyer
Smooth and delicious shakes! As I’ve cream for extra weight gain*
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Chloe
Verified Buyer
Optimum nutrition has good reputation and quality. Banana is the best*
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Robert E
Build Muscle
Verified Buyer
Closest stuff to steroids you will fine, best tasting too!*
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Rickey C
Verified Buyer
This product really works but it also requires you to keep a routine schedule and stick with it to get better results.*
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* Muscle & Strength does not imply any medical claims from this review. There are no
guarantees of specific results and results may vary.
* 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.
