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🚀 Bulk smarter, not harder with Serious Mass!
Serious Mass by Optimum Nutrition is a high-calorie weight gainer delivering over 1,200 calories, 50g of blended whey protein, and 250g+ carbohydrates per 2-scoop serving. Enhanced with 20+ vitamins and minerals including immune-boosting Vitamin C and Zinc, plus creatine for muscle support, it’s designed for adults aiming to increase muscle mass and overall weight. Ideal for post-workout or between meals, this chocolate-flavored powder blends best with a blender and offers versatile mix-in options to maximize your calorie intake and muscle growth.













| ASIN | B000GIPJ0M |
| ASIN | B000GIPJ0M |
| Age Range Description | Adult |
| Allergen Information | Milk, Soy |
| Best Sellers Rank | #1,251 in Health & Household ( See Top 100 in Health & Household ) #1 in Sports Nutrition Weight Gainers #138 in Sales & Deals |
| Brand Name | Optimum Nutrition |
| Customer Reviews | 4.5 4.5 out of 5 stars (34,318) |
| Date First Available | September 16, 2003 |
| Department | unisex-adult |
| Diet Type | Vegetarian |
| Flavor | Chocolate |
| Global Trade Identification Number | 00748927023800 |
| Is Discontinued By Manufacturer | No |
| Item Dimensions | 11.5 x 5.5 x 16 inches |
| Item Weight | 12 Pounds |
| Item model number | 1101529 |
| Manufacturer | Glanbia Performance Nutrition |
| Manufacturer | Glanbia Performance Nutrition |
| Manufacturer Part Number | 1101529 |
| Material Type Free | Caffeine Free |
| Model Name | ON SERIOUS MASS CHOCOLATE 12LB |
| Model Number | 1101529 |
| Net Content Volume | 13.88 Liters |
| Number of Items | 1 |
| Package Type Name | Tub |
| Product Benefits | Immune Support, Muscle Growth, Weight Gain |
| Product Dimensions | 11.5 x 5.5 x 16 inches; 12 Pounds |
| Protein | 50 Grams |
| Protein Source | Whey |
| Recommended Uses For Product | Calorie Increase, Muscle Growth, Post-Workout, Weight Gain |
| Supplement Formulation | Multi-Supplement |
| Total Servings Per Container | 16 |
| UPC | 748927023800 748927063592 |
| Unit Count | 192.0 Ounce |
| Vitamins And Minerals | 0.9, 3.7, 30, 5, 700 Milligrams, 100, 100, 1560, 410, 44, 59, 80 Percent Daily Value |
K**S
It helps a lot
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
Solid weight gainer – works great and tastes good!
I’ve been using Serious Mass for a few weeks now, and it's been super helpful for adding extra calories to my day. I’ve always had a hard time gaining weight, and this makes it way easier to get in the calories and protein I need without feeling like I’m constantly eating. The chocolate flavor is actually really good—especially when you blend it with milk, peanut butter, or a banana. Just a heads-up, the serving size is huge (like, 2 giant scoops), so a blender is a must. Don’t even try mixing it with a shaker bottle. I also like that it includes creatine and some vitamins, which saves me from buying those separately. Only downside is it can feel a little heavy if you’re not used to big shakes, so I started with half a serving and worked my way up. But overall, it’s been awesome for helping me bulk up. I’m already seeing some gains.
M**N
The serious mass is worth it
True to size and the chocolate flavor taste so gooodd
R**4
Great addition to a well balanced bulking diet plan
I have been bulking/ cutting for over 20 years and like to use this Mass gain as a meal replacement when bulking. Am I a professional? Hell no, I have to work and do not have the luxury of eating, sleeping, and 2 hour workouts With that said…I am 5’ 11 and 230 with bodyfat percentage depending on whether I am bulking or not. Know your body and what your caloric intake should be. With my body weight and eating 6 meals a day—my bulking caloric intake is 680 calories a meal- 1/2 serving of powder is plenty when mixed with almond milk. If you lose weight while using this like some posts state—-it isn’t the powders fault- this doesn’t work miracles, there are many other aspects to gaining/ maintaining mass Pros: -Contains creatine -Massive amount of calories/carbs/proteins- more than the normal body can process at once when using the serving size of 2 scoops-One scoop provides plenty of calories to repair muscle while you sleep, making this 32 servings instead of 16 -Powder makes it easier to quickly add a meal to your plan when you are tired of eating chicken and rice 5 times a day -mixes very well -It works because it contains a great balance of calories/carbs/protein *** drinking this powder only adds a good calorie ratio to your diet plan, it will not lift the weights for you or eliminate the need to eat 4-5 other meals a day -It is a quality supplement, ranked #4 bulking supplement in 2021 Cons: -It tastes ok…it is a supplement, not a candy bar -Price per serving is mid-range -If using as recommended (2 scoops per serving) it will only last 16 days - I prefer my supplements in contains over bags, this is an easy fix though if you are anal like me Overall, great product I’ve been using for years. This will not turn you into a beast if you are counting on it to work miracles…you still need to have a sufficient diet plan and work you butt off to gain mass. Note- if you are looking to just gain weight this product will definitely work! Take one serving daily and sit on the couch. Do your homework if debating on using a different brand, powders that contain arsenic is something to be very wary of. Good luck in your bulking adventure
T**J
Will keep this updated
Received the chocolate flavor Sept 15th and have been taking for a week and I will continuously update my results here. How does it taste? Not horribly bad but like others have said its very sweet and leaves a sweet after taste in your mouth that lasts like all day. I also feel a bit bloated at times but I feel its worth the potential gains. I'd recommend starting with 1 scoop like the bag says for your first few days to get your body used to it then bump it up to two scoops. If you can't take the two scoops cause this stuff is seriously thick do 1 scoop in the morning and 1 scoop after your workout or before bed. What tastes good with this stuff? I've found that the chocolate mixes well with peanut butter and taste pretty good plus it adds on more calories. I tried adding granola for additional calories but it just ends up either clumping together in my ball whisk or even worse you have to chew it up while its in the shake and all your taste buds can take with this stuff is drink and instantly swallow. I'll try mixing with bananas next week. The only negative things I can say about this stuff so far is that its packed with sugar, like so much sugar that I've cut out sweets from my diet while taking it no soda pop no candy, or cakes nothing sweet really. The other thing is if you work you'll have to start timing your bathroom use, I work first shift so by drinking this in the a.m I'm dropping a deuce immediately after work, I tried it at night before bed but it was very hard to concentrate on not running to the bathroom and also not fart my co-workers out of the office. Lastly and most important from what I've been reading be kind to your kidneys and drink lots of water all through out the day.
M**A
Big and good
Amazing
M**I
Già acquistato in passato Prodotto conosciuto e di qualità
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.
M**T
Sehr gutes Produkt! Löst sich gut auf, schmeckt angenehm und hilft beim Zunehmen und Muskelaufbau. Klare Empfehlung für alle, die Masse aufbauen möchten.
M**N
Good quality but result after 20/25 days know
A**ー
やっぱりいいです❕ 量を変えたら糖尿病の心配もないです❕ 私にはすごくあっていて 元気が出ます。 炭水化物も多く含まれるため トレーニングの後のはりもいい気がします また購入したいです❕
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