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🚀 Bulk up smarter, not harder with Serious Mass!
Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering 1,260 calories, 50g of blended protein, and over 250g of carbs per serving. Enhanced with creatine, glutamine, and 25 vitamins and minerals, it’s designed to maximize muscle growth and recovery for adults committed to serious weight gain and fitness goals.






















| ASIN | B000GIPJ02 |
| Age Range Description | Adult |
| Allergen Information | Milk, Soy |
| Best Sellers Rank | #1,785 in Health & Household ( See Top 100 in Health & Household ) #2 in Sports Nutrition Weight Gainers #283 in Sales & Deals |
| Brand | Optimum Nutrition |
| Brand Name | Optimum Nutrition |
| Customer Reviews | 4.5 out of 5 stars 20,053 Reviews |
| Diet Type | Vegetarian |
| Flavor | Vanilla |
| Item Dimensions | 15.35 x 11.42 x 5.51 inches |
| Item Highlight | Weight Gainer Protein Powder, Mass Gainer with Whey Protein, Creatine, Glutamine, BCAAs, Vitamins & Minerals, Easy Mixing |
| Item Weight | 12 pounds |
| Manufacturer | Glanbia Performance Nutrition |
| Manufacturer Part Number | 1031920 |
| Material Type Free | Caffeine Free |
| Model Name | Optimum Nutrition Serious Mass Weight Gainer Protein Powder Vitamin C Zinc and Vitamin D for Immune Support |
| Model Number | 1031920 |
| Net Content Volume | 13.88 liters |
| Number of Items | 1 |
| Package Type Name | Canister |
| Product Benefits | Muscle Growth, Weight Gain |
| Protein | 50 g |
| Protein Source | Casein, Egg, Whey |
| Recommended Uses For Product | Post-Workout |
| Servings per Container | 16 |
| Supplement Formulation | Multi-Supplement |
| Total Servings Per Container | 16 |
| UPC | 748927023824 |
| Unit Count | 192 Ounce |
| Vitamins And Minerals | 0.9, 3.0, 30.0, 5.0, 700.0 milligrams |
R**O
Excellent
I’ve been using this mass gainer for a while, and I’m really happy with the results. The vanilla flavor tastes great, it mixes well with milk, and it’s easy to drink. It helps me reach my daily calorie and protein goals, especially since I’m trying to gain weight. It keeps me feeling full for a long time, and the quality is excellent. I would definitely buy it again and recommend it to anyone looking for a reliable mass gainer.”
R**.
It works, wish it was cheaper
It really works if you're consistent at the gym and keep your regular diet up. I use it with milk instead of water so the taste is great. I actually prefer the chocolate over the vanilla because the vanilla is quite sweet. You do have to blend it for a while; otherwise, it can be very clumpy. Note that it also has CREATINE, so take that into account if you're also taking it separately. I hope they can reduce the price because it's a great product but can take a toll on your wallet.
T**N
Great mass gainer
really like this mass gainer. It mixes well, tastes good, and is easy to add to my daily routine. I’ve been enjoying it as an extra source of calories and protein. So far, I’m happy with the quality and would recommend it to anyone looking for a convenient mass gainer.
A**N
Effective Weight Gainer with a Few Reservations
Optimum Nutrition Serious Mass Weight Gainer has been an integral part of my journey to gain weight and build muscle. With its high protein and calorie content, it's undeniably effective in helping achieve those goals. While I'm quite satisfied with the results, there are a few aspects that give me pause. First and foremost, the impact of Serious Mass on my weight gain has been noticeable. The combination of high protein and calorie levels has definitely contributed to my muscle growth and overall mass gain. It's reassuring to have a product that delivers on its promise and aids in achieving the desired results. However, my enthusiasm is tempered by the ingredient list. While Serious Mass contains the necessary nutrients for muscle building, the sheer number of ingredients listed makes it difficult to discern exactly what I'm consuming. This lack of transparency raises some concerns about potential additives or fillers that may not align with my nutritional preferences. Taste-wise, Serious Mass is quite palatable, especially considering its nutritional profile. The variety of flavors available allows for some diversity in my shakes, which is a definite plus. Mixing the powder can sometimes be a bit challenging, and clumps can form, but with a little patience and a good blender, this can be managed. In terms of value, Serious Mass offers a substantial amount of product for its price, which is commendable given its effectiveness as a weight gainer. It's a cost-effective solution for individuals looking to bulk up without breaking the bank. In conclusion, Optimum Nutrition Serious Mass Weight Gainer deserves a solid four stars from me. It has undeniably helped me achieve my weight gain goals by providing the necessary protein and calories for muscle growth. While I'm somewhat uncertain about the extensive list of ingredients, the overall benefits and results have outweighed my reservations. For those seeking a reliable weight gain supplement, Serious Mass is worth considering – just be prepared to overlook some ambiguity in its ingredient composition.
M**Y
The best mass gainer
This is my fourth door fifth time purchasing this and I will see that I have gained at least 1 to 2 pounds every single week of muscle. I do like that it requires two scoops even though they are pretty big. I have had no issues with it being mixed or any digestive issues. I love this product and will continue to buy it every single time I run out.
L**E
Tastes GREAT
Excellent product. Taste is AMAZING
E**L
I truly like it 🥰
I’ve been using this mass gainer for a few weeks and I’m very satisfied with it. The taste is good, it mixes well, and it helps me reach my daily calorie and protein goals. I’ve noticed steady weight gain and improved energy during my workouts. That’s exactly what I was looking for to support muscle growth. Great value for the money, and I would buy it again.
U**H
Hilariously large scooper and serving size but otherwise okay
Protein shakes these days are hilarious with their massive serving sizes for the nutritional value they provide... My preferred protein shake brand from 10ish years ago is no longer made, only required 3 small scoops to get the same nutritional numbers this one has, making it easy to mix in an 18oz bottle, and tasted great. I think the 6 lb tubs of that gave me like 40-50 servings. Optimum Nutrition here however has a serving size of 2 scoops...with a MASSIVE scooper, for just EIGHT total servings per container... So...depending on if you drink this every day, or only after workouts, this is gonna last you 1-2 weeks at the most. Not a great deal in my opinion. I used 1 scoop, because even if I tried to use 2 scoops, it'd fill my 24oz bottle to the 16oz line and make it impossible to fill and then mix with water. I'd be drinking straight, chunky powder. Even 1 scoop is a bit much with my bottle though as this stuff mixes okay but it gets super foamy - 2 scoops definitely would not have worked without a bigger bottle. As for taste, this is a very strong "vanilla" flavor, almost too strong, and too sweet. I feel like I'm drinking a melted McFlurry from McDonalds, or milk from Rice Crispy Treat cereal. Two scoops of this stuff would have been overbearing on the flavor side of things too. Nutritionally it seems okay. It's got everything you need, except creatine. I prefer MuscleTech Mass Gainer these days, though it too has a pretty big multi-scoop serving size (not as much as this one though), it has everything this has + creatine, mixes wayyyyy better than this, and doesn't taste like an overloaded sugar desert. Sadly, they were out of stock so I went with this.
D**R
A helpful tool in gaining weight/muscle
With weight training and a very physical job I need a ton of calories (around 4000 a day) this mass gainer definitely helps, I find it tastes better with semi skimmed milk than water, and totals more calories consumed with 2 servings. The scoop is quite bigger, larger than what you'd used you put detergent in your washing machine, and the dose is 2 a day, you could just have one after a workout, but I have one at work around 10-11am which helps feel a gap well and being a shame is easier than food or snacks. I got the vanilla one, it tastes a tad different to the normal whey protein by ON, sweeter maybe but after a first few tries it's fairly nice, I don't use a blender just a shaker ball, and about 600ml of milk, it does a clump a bit and needs several shakes between a few swigs. Put the milk or water in first (this is common knowledge) but try and shake it hard/drink quick after dropping the powder in as the longer it fits the more it'll clump at the bottom and it's not fun trying to consume the gloop at the bottom, messy. Or just don't be lazy like my and blend it, might come out better.
J**R
El mejor con diferencia
Buen gusto, buena disolución, buenisima relación calidad/precio. Dos años y seguimos, es muy completo.
K**G
Zou het product langzr moeten testen om het echt goed te weten
Het is alsinds lekker en zeker effectief aangezien ik toch wat extra kilo’s erbij heb gekregen
K**L
Much better quality thanks to Amazon for giving me the real deal.
Good
F**L
Optimum Nutrition Serious Mass hochkalorisches Proteinpulver
Inhaltsstoffe und Nährwert: Das Proteinpulver bietet eine umfassende Mischung für den Masseaufbau. Jede Portion enthält eine hohe Anzahl von Kalorien, was besonders für den gezielten Masseaufbau wichtig ist. Zusätzlich sind 25 Vitamine und Mineralien enthalten, die zur allgemeinen Gesundheit und Unterstützung während intensiver Trainingsphasen beitragen. Das Pulver enthält sowohl Kreatin als auch Glutamin, die die Muskelregeneration und das Muskelwachstum fördern. Geschmack: Der Vanillegeschmack des Pulvers ist angenehm und nicht zu süß. Es ist unkompliziert zu mischen und ergibt einen cremigen Shake, der gut schmeckt und sich leicht trinken lässt. Für diejenigen, die häufiger Proteinshakes konsumieren, ist der Geschmack besonders wichtig, und Serious Mass enttäuscht hier nicht. Anwendung und Dosierung: Die Packung enthält ausreichend Pulver für 8 Portionen, was bei regelmäßiger Anwendung für eine gute Weile reicht. Die Dosierungsanweisungen sind klar und einfach zu befolgen. Ich finde es besonders praktisch, dass das Pulver sich leicht in Wasser oder Milch auflösen lässt und keine Klumpen bildet. Wirkung: Ich habe festgestellt, dass die regelmäßige Einnahme von Serious Mass positive Auswirkungen auf meinen Masseaufbau hat. Durch die hohe Kalorienanzahl pro Portion konnte ich mein Kalorienziel leichter erreichen und die zusätzlichen Vitamine und Mineralien haben meine allgemeine Gesundheit unterstützt. Kreatin und Glutamin haben zur besseren Muskelregeneration beigetragen, sodass ich mich schneller von intensiven Trainings erholen konnte. Verpackung: Die Verpackung des Proteinpulvers ist robust und praktisch. Sie lässt sich gut verschließen, um das Pulver frisch zu halten. Die Informationen auf der Verpackung sind übersichtlich und gut verständlich. Fazit: Optimum Nutrition Serious Mass ist eine hervorragende Wahl für alle, die gezielt Masse aufbauen möchten. Die hochkalorische Mischung mit 25 Vitaminen und Mineralien sowie Kreatin und Glutamin bietet eine umfassende Unterstützung für intensives Training und Masseaufbau. Der angenehme Vanillegeschmack und die einfache Anwendung machen dieses Produkt besonders empfehlenswert. Ich bin sehr zufrieden mit diesem Proteinpulver und kann es jedem uneingeschränkt empfehlen, der auf der Suche nach einem wirksamen und schmackhaften Masseaufbauprodukt ist.
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