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🚀 Bulk up smarter, not harder with Serious Mass!
Optimum Nutrition Serious Mass is a high-calorie mass gainer designed for serious athletes and professionals aiming to maximize 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 in a low-fat, no added sugar formula. Available in six delicious flavors, this protein powder is your go-to for convenient, nutrient-dense post-workout shakes or meal supplements that support intense training and muscle repair.














| ASIN | B002DYIZPS |
| Age Range Description | Adult |
| Allergen Information | Contains: Hazelnuts, Milk, Peanuts, Wheat |
| Benefits | Muscle Growth |
| Best Sellers Rank | 1,087 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 21 in Whey Nutrition Protein |
| Brand | Optimum Nutrition |
| Brand Name | Optimum Nutrition |
| Country Of Origin | United Kingdom |
| Customer Reviews | 4.5 out of 5 stars 3,222 Reviews |
| Diet Type | Vegetarian |
| Diet type | Vegetarian |
| Flavour | Banana |
| Global Trade Identification Number | 00748927028874 |
| Item Dimensions | 29.2 x 14 x 40.6 centimetres |
| Item Weight | 5.45 Kilograms |
| Item weight | 5.45 Kilograms |
| Manufacturer | OPTIG |
| Manufacturer Contact Information | 4 Waterside, Dublin 24, Ireland |
| Manufacturer Part Number | 1101533 |
| Material Type Free | Sugar Free |
| Model Name | Serious Mass 5.45kg |
| Model Number | 1101533 |
| Net Content Volume | 13.88 Litres |
| Number of Items | 1 |
| Package Type Name | Tub |
| Protein | 15 g |
| Recommended Uses For Product | Post-Workout, Pre-Workout |
| Servings per container | 16.0 |
| Total Servings Per Container | 16.0 |
| UPC | 748927028874 |
| Unit Count | 5450.0 gram |
| Vitamins And Minerals | 0.4 g |
K**I
Great
Great stuff, love the flavour of the banana but it makes your urine look like a high vis Jacket lol so for this reason alone i choose the strawberry which still tastes really good. Kinda expensive compared to other shakes available but trust me your paying for quality and this is worth the extra costs as this is the best you can get. Will not buy anything else!
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!!!?
D**C
The best after trying multiple mass gainers over the years
Is my fav mass gainer. 1 thing though lol does come out the same colour it goes in when you urinate haha almost like chemical waste😂😭 but I love it all the same. Also read on for mixing tips if you need/want I take half the serving size (to save money and its an addition to my diet not a main meal). So 180-200g with 250ml of milk or 200ml of water for a thick shake. If you go to 300ml it will be more watery regardless of the 200g of powder. So for thick 200ml water/250ml milk. For more runnier shake 300ml water or milk. Also peanut butter/ice will help thicken your shake. Enjoy
A**A
Great for hard gainers
This product is great. Exactly what you would expect in a weight gainer; high calories, high carbs, quite high in protein. It is perfect for people trying to gain weight, who have a hard time struggling to get those extra calories from solid food. If you are a hard gainer this is a must. I gave this 4 stars, and not 5 for two reasons. First the taste is ok, but since you have to drink so much of it one go, it will kinda make you feel a little sick, and the after taste is not that nice either. Second if you are thinking about taking this in between meals think again. Lets say you take this after breakfast as a snack. Unless you have a super fast metabolism then you would have to wait a lonnng time till you are hungry enough to have lunch, which if you are a hard gainer is not a good thing. Even after a hard workout, where I was obviously hungry I still could not eat for at least 2 hours after taking this. So If you are thinking of taking this only once a day I would suggest taking it right before bed on your rest days, and once straight after your workout on your lifting days(which you should be doing if you a hard gainer). You should always eat solid food, before turning to supplements and if you skip lunch or dinner after taking this then it would be a meal replacement rather than a supplement.
C**N
Good but not cheap
Buy this for son a lot. He likes it but I think it’s very expensive
Y**V
Yummy banana flavour)
Gain muscle and weight in months very tadty vanana flavour
A**M
Doesn't quite work for me
I have a shaker with a part inside but it still doesnt mix well. looks chemically colured before drinking. Taste is ok but it gives me a sore stomach if i have the whole shake so i tend to have one scoop rather than two and have tat twice a day but if im honest i dont know if ill be able to keep taking im hoping the sore stomach stops its like it goes right through me
J**N
Worth The Money
Twice as much as the tubs so it will actually last longer, make sure you have a Serious Mass Tub to refill and these are absolutely perfect!
C**E
Bon produit
BIEN
K**A
Hervorragendes Proteinpulver für Masseaufbau
Ich bin sehr zufrieden mit dem Optimum Nutrition Serious Mass hochkalorischen Proteinpulver. Ich benutze es immer wieder und habe festgestellt, dass es mir am besten hilft, meine Masseaufbauziele zu erreichen. Ich habe auch andere Marken ausprobiert, aber keine hatte den gleichen Effekt wie Optimum Nutrition. Der Geschmack ist angenehm und es lässt sich gut mischen. Insgesamt ein großartiges Produkt für alle, die ernsthaft Masse aufbauen möchten.
D**O
Ottimo prodotto
Allora sta da premettere che ovviamente non sono prodotti miracolosi ma ci sono vari fattori (allenamento, alimentazione e costanza) però un idea mia e che questo prodotto serve per chi era magro che assume poche calorie quindi diciamo che è un buon sostituto. Si miscelano bene e hanno un buon sapore soprattutto la banana
M**C
Great to reach your calorie intake
Perfect if you are trying to gain weight ( half scoop if you are a woman twice day) great flavor. You won't feel full so keep a record of what you are eating.
M**K
Couldn’t Be Happier
Everything about this product is fantastic. Five stars from me!
Trustpilot
1 week ago
2 weeks ago