

🚀 Serious Mass, Serious Gains: Elevate your muscle game with every scoop!
Optimum Nutrition Serious Mass is a high-calorie mass gainer designed for athletes and fitness enthusiasts aiming for rapid muscle growth and recovery. Each serving delivers over 1250 calories, 50 grams of protein, 3 grams of creatine monohydrate, and 25 essential vitamins and minerals, all with less than 5 grams of fat. Available in six delicious flavors, this formula supports intense training regimens and helps you pack on quality mass efficiently.














| - Saturates | 1.0 g |
| ASIN | B002DYIZPS |
| ASIN | B002DYIZPS |
| Age Range Description | Adult |
| Allergen Information | Contains: Hazelnuts, Milk, Peanuts, Wheat |
| Best Sellers Rank | 1,008 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 20 in Whey Nutrition Protein |
| Brand | Optimum Nutrition |
| Carbohydrate | 75.0 g |
| Country of origin | United Kingdom |
| Country of origin | United Kingdom |
| Customer Reviews | 4.4 4.4 out of 5 stars (30,363) |
| Customer reviews | 4.4 4.4 out of 5 stars (30,363) |
| Date First Available | 10 Aug. 2009 |
| Format | Granule |
| Is discontinued by manufacturer | Yes |
| Item model number | 1101533 |
| Manufacturer | OPTIG |
| Manufacturer contact | 4 Waterside, Dublin 24, Ireland |
| Product Dimensions | 29.21 x 13.97 x 40.64 cm; 5.45 kg |
| Serving Size | 334 g |
| Storage Instructions | In a cool, dry place |
| Units | 5450.0 gram |
| Weight | 5.44 kg |
T**S
Good
It's helping me put on weight. I added a tablespoon of peanut butter and a banana, tastes really good with the strawberry one. This seems to be the best mass gainer, I've looked around and this is always said to be the best with approved ingredients. It is sweet tasting but if you add some peanut butter it will tone down the sweetness. I'm just doing pushups, ab crutches, planks and dumbbells. I don't go to a gym. With noticeable growth to my arms and chest, just started working on abs to balance it out. I only started to see results after drinking this stuff. Good price on this bigger bag so I think I'll get this one again in the future.
L**G
It’s a must buy ! Best & high quality mass gainer! Imo the best out there
I only use this brand of mass gainer… reason being it sits will in my digestive system, it definitely does what it supposed to do. I have used other brands, cheaper brands but they do not pack the punch this do 💪 I have literally been buying this for over 10 years now & will never use other cheaper products. Yes it’s expensive but quality costs money simple! It mix fairly well. The ingredients are of high quality. In my opinion you will not be disappointed & like I said you will definitely be getting the performance you want. I packed on good quality weight… 2st in 3 months but that’s training 5 days a week keeping meals healthy. Hope you find this review helpful.
B**N
Excellent for Weight and Mass Gain
This protein powder is an excellent for anyone serious about gaining mass. The large size offers fantastic value, and the mix is effective and potent. It mixes well, taste good and is essential for hitting those high-calorie and high-protein goals. Highly recommended for fast, reliable results!
A**L
Eh not amazing
Tastes actually quite nice for a mass gainer, MASSIVE scoop so won’t fit for loads of shaker bottles. Also can still be slightly clumpy without a blender but not too bad.
S**S
STRUGGLE TO EAT
I don’t use this protein for the gym I use it cos I struggle to eat normal food and so this sometimes becomes my only source of food and with 1250 calories per shake I know if I drink 2 a day I’ll get all the nutrients I need infact probably more then I’d get from everyday food, I’ve tried loads of different powders and this is by far the best one for taste , filling me up and keeps me looking well, ITS WELL WORTH THE MONEY IF LIKE ME YOU STRUGGLE TO EAT!!!?
J**O
Effective product for underweight people
I've always been slim/athletic but after a serious illness I went under nine stone and stayed there (I'm five foot ten). I have a fast metabolism and eating the required amount of food to healthily gain weight was extremely difficult to sustain. I tried eating junky high calorie snacks but realised it was a stupid way of trying to gain weight. So after buying this product I went straight in and tried to drink a full serving - mistake! I managed it but felt quite ill afterwards. I highly recommend you start with half or even a quarter serving to begin with, just until your stomach adapts. It's now two weeks later and with trial and error I've found that splitting a full serving into three is best for me. One in the morning, one after lunch, one in the evening. I use full fat milk, ice cream and a banana to boost the calories per full serving to over 2000, and I find a blender works great to give a nice semi-thick smooth shake. When I started a fortnight ago I weighed 8 stone 12, I now weight 9 stone 8, so I've gained roughly 10 pounds in two weeks, with fluctuations along the way. I've just bought another 5.4kg bag and plan to continue to steadily gain until I reach around 11 stone. I bought some weights and with some advice I've started a light exercise programme with the aim of turning the energy to muscle and shaping my body a bit. I have more modest aims than many who take this supplement, I'm not looking to build huge muscles and train super hard, but if you're like me - underweight and a bit unfit - then I recommend this product along with some sort of exercise programme so it doesn't just go straight to your belly. It really does promote weight gain, I've been very pleasantly surprised with the results, and will continue to use the product as needed in order to achieve and maintain my target weight. The chocolate flavour is very pleasant, if a little sweet, and I now have no problem ingesting what I need to in order to gain weight. It may seem expensive, but at £2.50 a day it works out an easy, reliable and cost effective way to supplement your diet without resorting to less healthy alternatives. It works for skinny old me, and I don't see any reason why it shouldn't work for skinny old you! :) Edit - it's now 22 days after I first used the product and I'm now just over ten stone, so that's 16lb in 22 days. People are commenting on the difference and it's done wonders for my energy levels and appetite. So all in all I can't recommend this product any more highly, it genuinely works. Can't say fairer than that! Last update - I'm now at my target weight of 11st, it's taken 54 days for me to put on 30lbs - two stone two pounds in just under two months. That's beyond what I expected. If I could give a final note it would be to watch your body fat as without exercise this product will raise it quite easily. I'm now going to reduce my servings to maintain this weight, with my new increased appetite it's possible that I soon won't need a supplement at all. So that's me signing off, a bit heavier and a lot happier!
N**H
Good
M**D
منتج ممتازة وخدمة ممتازة من البائع ظهر الفرق خلال 3 أيام مع التمرين بس للتوضيح اهم حاجة الاستمرار
M**E
muy bien
K**S
Optimum Nutrition Serious Mass is a great choice for anyone looking to gain weight, build muscle, or increase overall calorie intake. The Chocolate flavor mixes smoothly—especially if you use a blender—and has a rich, dessert-like taste without being overly sweet. Each serving delivers a very high amount of calories, protein, and carbs, which makes it ideal for people with fast metabolisms or those who struggle to eat enough throughout the day. It also includes added vitamins, minerals, and creatine for extra support. The bag is large and lasts a good amount of time depending on how much you use. The powder is heavy, so mixing by hand can be a bit difficult, but blending solves that problem easily. Overall, Serious Mass is effective for healthy weight gain and muscle-building goals. If you need a calorie boost and don’t mind a thick shake, it’s a solid and reliable product.
A**N
Ottimi effetti e gusto davvero piacevole. Richiede un po’ più tempo per sciogliersi in acqua, ma le porzioni sono abbondanti e soddisfacenti.
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