🚀 Elevate your muscle game with Serious Mass — because average gains are so last season!
Optimum Nutrition Serious Mass is a high-calorie mass gainer powder delivering over 1250 calories, 50g of protein, and 3g of creatine per serving. Enriched with 25 essential vitamins and minerals and low in fat, it supports muscle growth, recovery, and performance. Available in six delicious flavors, it’s designed for athletes and fitness enthusiasts aiming for serious size and strength gains.














| - Saturates | 0.5 g |
| - Sugars | 7.8 g |
| ASIN | B0015R36XU |
| ASIN | B0015R36XU |
| Age Range Description | Adult |
| Best Sellers Rank | 579 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 33 in Whey Nutrition Protein |
| Brand | Optimum Nutrition |
| Carbohydrate | 77 g |
| Country of origin | United Kingdom |
| Country of origin | United Kingdom |
| Customer Reviews | 4.4 4.4 out of 5 stars (42,660) |
| Customer reviews | 4.4 4.4 out of 5 stars (42,660) |
| Date First Available | 4 Sept. 2008 |
| Energy (kcal) | 380.01 kcal |
| Fat | 1.4 g |
| Format | Powder |
| Is discontinued by manufacturer | No |
| Item model number | 1031919 |
| Manufacturer | OPTIG |
| Manufacturer contact | 4 Waterside, Dublin 24, Ireland |
| Product Dimensions | 20.32 x 20.32 x 25.7 cm; 2.72 kg |
| Protein | 15 g |
| Salt | 0.47 g |
| Serving Recommendation | 2 Scoops |
| Serving Size | 100 g, 334 g |
| Storage Instructions | Store in a cool and dry place |
| Units | 2730.0 gram |
| Weight | 3.18 kg |
K**L
good taste, every day use, not waste of money
protein good quality, valuable, seal pack, mixability,
F**N
Superb
I never expected this to be so huge. Even the spoon is too huge 😭. Tastes great I take it with water. Just got now. Bought it during black Friday sale. Best decision
M**A
Low protein per hundred grams?
Lovely taste & great texture but I do wonder if only 15gs of protein per 100gs is a bit low? Apart from that it's good stuff.
T**S
Nice stuff
I mix mine with milk and some times with ice cream as well, it is really good. I've tried them all in the past, strawberry is the best tasting and dissolves the best. It is really sweet though. I don't know what people are complaining about, the scoop is half the diameter of the lid.
L**E
Works great
Big calorie boost and perfect for anyone trying to put on weight. The taste is good, mixes well, and it’s very filling. I’ve noticed real progress in training since adding this to my routine.
S**S
Good price
Does what it says,on the tub . Standard price . Good stuff.
P**O
Protein shakes
Did not fill any different
T**S
Very good - I recommend
This stuff is good. I defo notice a difference in weight gain when I drink these shakes, and the powder dissolves so easily and creates a nice smooth easy to drink protein shake. It’s not thick like other shake powders
ア**M
増量にはこれ。 同じブランドの他のプロテインも使用していましたが筋肉を大きく作るにはやはりこの高カロリーバージョンですね 混ざりづらいのでミキサーを使うといいですね。
M**H
I usually buy a chocolate flavor, so it’s the first time to taste a strawberry, And it was delicious
K**Y
Good
E**N
I bought this to gain weight. The gin master told me to drink this. It tastes like chocolate. It's good. I plan to buy more when I lose weight.😋👍👍👍👍
S**O
Puedo decir que sí funciona para lo que promete: ganar masa y peso rápidamente. Cada batido tiene muchísimas calorías (más de 1 200 si usas los dos cacitos completos), así que es ideal para quienes les cuesta subir de peso o tienen un metabolismo muy rápido como en mi caso, Se nota el aumento de energía y masa corporal en pocas semanas si lo combinas con entrenamiento. El sabor está bastante bien, aunque es algo dulce. Puede causar pesadez, gases o molestias digestivas si no estás acostumbrado o si lo tomas muy rápido. En fin, lo recomiendo si estás enfocado en ganar peso de forma rápida y no te importa tanto la limpieza de los ingredientes. En mi caso ha sido una buena ayuda para subir de peso de forma controlada. 👍
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