









🚀 Bulk Up, Power On: The Ultimate Muscle Fuel You Can’t Afford to Miss!
Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering 1,250 calories and 50 grams of blended protein per serving, enriched with 25 essential vitamins and minerals plus performance boosters like creatine. Designed for adults aiming to build muscle mass efficiently, it supports recovery and immune health with zero added sugar carbs, making it the go-to formula for serious muscle builders and fitness pros.






| ASIN | B000GIPJ02 |
| ASIN | B000GIPJ02 |
| Age Range Description | Adult |
| Allergen Information | Eggs, Milk, Soy, Wheat |
| Best Sellers Rank | #1,252 in Health ( See Top 100 in Health ) #636 in Multiple Vitamin-Mineral Combination Supplements |
| Brand | Optimum Nutrition |
| Customer Reviews | 4.2 4.2 out of 5 stars (48,098) |
| Customer reviews | 4.2 4.2 out of 5 stars (48,098) |
| Date First Available | 7 August 2012 |
| Department | GNC|ALL|ALL|NUTRITIONAL SUPPLEMENTS |
| Format | Powder |
| Is Discontinued By Manufacturer | Yes |
| Item model number | 1031920 |
| Manufacturer | Glanbia Performance Nutrition |
| Product Dimensions | 29.21 x 13.97 x 40.64 cm; 5.44 kg |
| Serving Recommendation | One Scoop |
| Serving Size | 2 scoops, 2 scoops |
| Units | 5440 Grams |
| Use By Recommendation | Between Meals, After Weight Training & Before Bed |
| Weight | 12 Pounds |
H**L
this good
this good
R**L
Works well for what it is
I bought this mass gainer two months so I can gain weight and put on muscle mass. Let me tell you it worksssss! Over the two months I’ve been taking it I’ve noticed noticeable size gains across my entire body. Though one thing if you were to take this and not train with intensity you’ll gain fat but me since I train five days a week with high intensity per session this mass gainer works very well as my post workout shake and helped significantly to put on muscle mass as well.
M**.
Will recommend
It works superbly
K**F
Highly recommended
Awesome product
M**M
Vanilla tastes awful
I bought the vanilla flavor and it’s one of the worse mass gainers I have drank, the after taste is very bad makes me gag. I have the full bottle and I can’t even return it
A**N
Loved it
Buy it
B**E
Fast delivery
Not sweet if you are someone who like tasty things though for me i don't use sugar so i prefer the taste cause before i was using other brand and i had to really dilute to reduce the sweetness, just received it today so lets see if it does what is written
W**M
Exceeded
Exceeded expectations, beautiful test, now the gains begin in-shaa-Allah
D**R
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.
N**H
Good
N**N
Comme la plupart ici, j'ai du mal à prendre du poids. Après lecture des avis ici et sur le net, je me décide à tester ce produit ! 52 kilos pour 172 à l'origine, j'ai gagné 3 kilos en 1 mois ! Voir la balance afficher une hausse de poids donne vraiment un sentiment de satisfaction ! Mon alimentation reste toujours la même, à savoir, 3 repas par jour, petit déjeuner, déjeuner et dîner. Je répartis la prise en deux parties, une dose pleine le matin en même temps que le petit déjeuner (ça me donne également de l'énergie pour la journée) et une dose pleine dans l'après-midi ou la soirée après une séance de musculation. Ma séance de musculation ne dure par plus de 30 minutes, je fais de courtes séries mais privilégie des poids lourds. Pas de prises de bide à déclarer, pensez à faire une activité physique pour éviter cela ! Produit à conseiller pour ceux qui ont vraiment du mal à prendre du poids.
A**E
using this one for years now. for me it works perfect. am even mixing it sometime with fresh fruits to make a smoothy.
K**G
Het is alsinds lekker en zeker effectief aangezien ik toch wat extra kilo’s erbij heb gekregen
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