









Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.
Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.
🚀 Bulk Up, Power On, and Own Your Gains!
Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering 1,260 calories, 50g of whey protein, and over 250g of carbohydrates per serving. Enhanced with 25 vitamins and minerals including immune-supporting Vitamin C, Zinc, and Vitamin D, it’s designed for adults aiming to increase muscle mass and overall weight. Ideal for post-workout recovery and daily calorie surplus, this vanilla-flavored powder blends easily and supports serious bulking goals with trusted quality.






















| ASIN | B000GIPJ02 |
| Age Range Description | Adult |
| Allergen Information | Milk, Soy |
| Best Sellers Rank | #1,538 in Health & Household ( See Top 100 in Health & Household ) #1 in Sports Nutrition Weight Gainers #192 in Sales & Deals |
| Brand | Optimum Nutrition |
| Brand Name | Optimum Nutrition |
| Caffeine Content Description | Caffeine Free |
| Customer Reviews | 4.5 out of 5 stars 18,668 Reviews |
| Diet Type | Vegetarian |
| Flavor | Vanilla |
| Item Dimensions | 11.5 x 5.5 x 16 inches |
| Item Weight | 192 Ounces |
| Manufacturer | Glanbia Performance Nutrition |
| Manufacturer Part Number | 1031920 |
| Material Type Free | Caffeine Free |
| Model Name | Optimum Nutrition Serious Mass Weight Gainer Protein Powder Vitamin C Zinc and Vitamin D for Immune Support |
| Model Number | 1031920 |
| Net Content Volume | 13.88 Liters |
| Number of Items | 1 |
| Package Type Name | Tub |
| Product Benefits | Immune Support, Muscle Growth, Weight Gain |
| Protein | 50 Grams |
| Protein Source | Whey |
| Recommended Uses For Product | Calorie Increase, Muscle Growth, Post-Workout, Weight Gain |
| Servings per Container | 16.0 |
| Supplement Formulation | Multi-Supplement |
| Total Servings Per Container | 16.0 |
| UPC | 748927023824 |
| Unit Count | 192.0 Ounce |
| Vitamins And Minerals | 0.9, 3.0, 30.0, 5.0, 700.0 Milligrams, 100, 100, 28, 63, 80 Percent Daily Value |
C**Y
Highly recommend for anyone looking to bulk up effectively! 💪
This is my 5th time buying Optimum Nutrition Serious Mass, and it continues to deliver great results. It has really helped me maintain a steady calorie surplus and support my weight gain goals. The taste is consistent, it blends well (especially in a smoothie), and I like that it includes added vitamins like Vitamin C and Zinc. I’ve seen noticeable improvements in my weight and muscle size when using it consistently with workouts.
J**U
Tastes better than expected and mixes easily
I've been using this protein shake for about a couple of weeks now, and overall I’m really satisfied with it. I usually take it after workouts or sometimes as a quick meal replacement, and it’s been working well for me.
W**E
Pea Protein Mass – Plant-Based Muscle & Weight Gain Support
Pea Protein Mass is a great plant-based supplement that helps build muscle and gain healthy weight. It’s easy to digest, supports recovery, and is perfect for anyone looking for a dairy-free option to boost strength and energy
A**N
Effective Weight Gainer with a Few Reservations
Optimum Nutrition Serious Mass Weight Gainer has been an integral part of my journey to gain weight and build muscle. With its high protein and calorie content, it's undeniably effective in helping achieve those goals. While I'm quite satisfied with the results, there are a few aspects that give me pause. First and foremost, the impact of Serious Mass on my weight gain has been noticeable. The combination of high protein and calorie levels has definitely contributed to my muscle growth and overall mass gain. It's reassuring to have a product that delivers on its promise and aids in achieving the desired results. However, my enthusiasm is tempered by the ingredient list. While Serious Mass contains the necessary nutrients for muscle building, the sheer number of ingredients listed makes it difficult to discern exactly what I'm consuming. This lack of transparency raises some concerns about potential additives or fillers that may not align with my nutritional preferences. Taste-wise, Serious Mass is quite palatable, especially considering its nutritional profile. The variety of flavors available allows for some diversity in my shakes, which is a definite plus. Mixing the powder can sometimes be a bit challenging, and clumps can form, but with a little patience and a good blender, this can be managed. In terms of value, Serious Mass offers a substantial amount of product for its price, which is commendable given its effectiveness as a weight gainer. It's a cost-effective solution for individuals looking to bulk up without breaking the bank. In conclusion, Optimum Nutrition Serious Mass Weight Gainer deserves a solid four stars from me. It has undeniably helped me achieve my weight gain goals by providing the necessary protein and calories for muscle growth. While I'm somewhat uncertain about the extensive list of ingredients, the overall benefits and results have outweighed my reservations. For those seeking a reliable weight gain supplement, Serious Mass is worth considering – just be prepared to overlook some ambiguity in its ingredient composition.
A**A
Great Weight Gainer, Quality Product.
I purchased this item for my father, as he was looking to gain weight. We've used this brand before, and he's liked the taste, as well as the overall feel of it, so we decided to give it a shot. This powder is easy to use and incorporate into a daily diet. It's also packed with vitamins and protein, which is a nice bonus. The quality is also excellent. It dissolved easily in a shake, and also digests well. The texture is a little rough, though balanced and not too chunky when thoroughly incorporated, and overall, it is great. At $50 for 6 pounds, it's a bit pricey, but quality doesn't come cheap. I would recommend this product.
R**L
Have used this since 2021
I’ve been using this protein for years. Overall, with powerlifting and this, I’ve put on about 50 lbs. Recently I’ve lost 5 lbs due to nursing school (exhausted, less money, very busy). I have been trying different protein powders which I also liked, but after seeing the weight on the scale today, I’m back. I prefer the vanilla, because it can go in more smoothies or you can buy multiple coffee syrup flavors and add them to change it up. This time I’ll be having vanilla and brown sugar cinnamon. Excited to be working towards my goal of 150 lbs again now that I’m about to get my life back lol
M**T
Bad packaging
Love the product been using it daily for about 5 years now. I hate how they changed the packaging and now it just spills everywhere when transferring from bag to jar
V**P
Optimum Nutrition
I'm try to gain weight so seen many positive reviews. But everyone is different in body chemistry. I took the advice of several reviews and started with 1/2 a portion, I put the milk in a large glass then poured the powder in & used my blender stick. It was very smooth & tasted like a melted vanilla milkshake & was so sweet, I had to force myself just to drink the half mixture. It is very sweet & filling. Tried it for 3 days & was so filling it was difficult to eat any food. So I stopped & took a break & will try 1/4 a recipe until I can stretch my stomach. I cant possible imagine drinking a full recipe without throwing up. It is supper sweet.
A**E
tastes good and doesn’t have too much sugar
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
Zou het product langzr moeten testen om het echt goed te weten
Het is alsinds lekker en zeker effectief aangezien ik toch wat extra kilo’s erbij heb gekregen
C**O
Super proteine! 🔝
Che dire? Dopo aver provato molti prodotti di diverse marche, mi sono convinto che era arrivato il momento di testare le 'Serious Mass' della Optimum Nutrition. Mi alleno 6g su 7 la settimana, le prendo tutti i giorni perché a livello calorico ti riempiono la giornata e ti permettono di allenarti nella maniera più consona. Il gusto vaniglia è perfetto se lo si mischia con il latte, o facendo dei frullati, inoltre dentro la scatola si trova il misurino per dosare bene il contenuto. Subito dopo la prima settimana si vedevano i risultati prefissati, aumento di massa muscolare ben visibile, il mio corpo aveva ripreso brillantezza. Al momento il miglior prodotto che offre il mercato.
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.
L**A
رائع
شهادتي فيه مجروحه ساعدني كثير فمرحلة زيادة وزني وبناء العضل
Trustpilot
1 month ago
5 days ago