Search  for anything...

Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Strawberry, 6 Pound (Packaging May Vary)

  • Based on 70,331 reviews
Condition: New
Checking for product changes

Buy Now, Pay Later


As low as $8.72 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

Non-returnable due to Food safety reasons

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Sunday, Jun 1
Order within 4 hours and 35 minutes
Available payment plans shown during checkout

Flavor Name: Strawberry


Size: 8 Servings (Pack of 1)


Features

  • HIGH CALORIE WEIGHT GAINER: More than 1,200 calories per 2-scoop serving
  • 50 grams of blended protein per 2-scoop serving
  • Over 250 grams of carbohydrates per 2-scoop serving
  • With over 20 vitamins and minerals including Vitamin C and Zinc to provide immune support
  • MORE VERSATILITY: Using an electric blender, add fresh or frozen fruits, peanut butter, nuts, and other calorie dense foods to boost your weight gain potential

Description

More calories. More protein. More carbs. SERIOUS MASS by Optimum Nutrition serves over 1,200 calories, 50g of blended protein, and over 249g of carbohydrates per 2-scoop serving to help you maximize your daily caloric intake – the ideal post-workout and between meals shake for sizing up your goals. SERIOUS MASS provides you with more tools to help you pack on pounds, when taken in addition to normal calorie intake and over time with regular resistance training.

Brand: Optimum Nutrition


Flavor: Strawberry


Servings per Container: 8


Item Weight: 6 Pounds


Material Type Free: Caffeine Free


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 8 x 8 x 10.12 inches; 6 Pounds


Item model number ‏ : ‎ 1031919


Department ‏ : ‎ unisex-adult


Date First Available ‏ : ‎ November 22, 2004


Manufacturer ‏ : ‎ Optimum Nutrition


Country of Origin ‏ : ‎ USA


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Jun 1

This item is non-returnable:

Non-returnable due to Food safety reasons

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • I gained about 10 pounds
Flavor Name: Strawberry Size: 16 Servings (Pack of 1)
I gained about 10 pounds so far since I bought this. I take 1 scoop with milk per day every other day in my 24oz electric shaker and drink it as I do my lifts. Still on the first bag but I am already 10 pounds heavier and it looks like it didn't all just go to my gut either. This stuff works good if you are skinny like me and pair it with other sources of protein (real food and protein snacks). I am 6 foot tall and went from 135lb to 152lb, I started taking this at around 140lb and still have a decent amount of the first bag left since I only take half portions every other day with milk. The taste is pretty good its like strawberry milk but I will say you have to turn your electric shaker or blender on a bit longer because its so much powder otherwise you will get chunks. I don't have chunking issues with other powders in this electric shaker but I think its just the sheer amount of powder thats the problem and you will get that with any of these mass gainer products. ... show more
Reviewed in the United States on January 3, 2025 by Somebody That You Used To Know

  • A cost efficient weight gainer that works!
Flavor Name: Chocolate Size: 16 Servings (Pack of 1)
This is the first and only weight gainer I've tried since I decided to add a few pounds and start lifting weights. To keep it short and to the point, this stuff works great if you stick with it. CONSISTENCY IS KEY. If you want to put on pounds, you must create a calorie surplus, and this shake helps you fill the gaps in your diet. It's not a complicated concept, but it takes dedication to achieve your goals. This is not some miracle product--if you have no motivation, no shake will help you. The shake tastes pretty good and is not too sweet. It's not as good as regular chocolate milk, but it's close. Consistency is thick and a bit sticky (with milk). I take 1 scoop, twice a day. I don't see how it's possible to drink 2 scoops at a time given how large the scoops are (1 cup), but then again, I'm not a heavy eater to begin with. I drink it with WHOLE/Vitamin D MILK (important) and a tablespoon of peanut butter. Unless you're allergic to milk/peanuts, there's no sense in using water if you want to add mass. You can also add some olive oil for extra calories as it gets diluted. 2 scoops with whole milk and peanut butter will add 1600+ calories to your diet. If you eat your 3 main meals and snacks on top of that, getting to 3000+ calories is fairly easy. As far as results...I went from 6'0 155 to 6'0 165 in 6 weeks in conjunction with eating more in general and lifting weights. In a month, I'll be over 170. The key to being successful in gaining weight (and losing weight, for that matter) is consistency. Hit your calorie target every day, no exceptions (I personally aim for 3500+ calories per day, use MyFitnessPal to track them). Us skinny guys tend to think we're eating more than we actually are, and thus we stay skinny and get frustrated. Keep track of your intake, eat (a lot of) healthy foods, and add this shake to your diet and you'll be putting on lbs in no time. One final note: You may experience some bloating in the first month or so of drinking these. I got to the point where I wanted to vomit at times. Push through it and your stomach will adjust. P.S. Use Subscribe and Save and you get this at under $40 shipped for 12 lbs. Talk about bang for the buck. ... show more
Reviewed in the United States on April 14, 2011 by SSH85

  • Taste Great!
Flavor Name: Chocolate Size: 8 Servings (Pack of 1)
I finally received my package, saying finally because there was a huge mixup with delivery and it ended up being with a neighbor I do not know for days. Since my building does not have a secure gate, my neighbor took it in with the intention of delivering by morning, as it was about 4 am or so when delivery driver dropped off. I have only been able to try 1x and the taste is absolutely doable! I mix it in with my coffee and it is clumpy at first, but dissolve within minutes. I also drink ensure plus throughout the day. The reviews have been great and I am expecting great results! Will update in a few weeks, I am currently at 140 pounds but wanting to get to 180. ... show more
Reviewed in the United States on January 13, 2025 by Jay

  • Taste and quality.
Flavor Name: Vanilla Size: 16 Servings (Pack of 1)
This product has a good quality and perfectly homogeneous mixture. However, it’s very sweet which makes people unwilling to drink it. It’s very expensive nutrition for gaining weight even though it gives a good amount of energy and feels effective.
Reviewed in the United States on December 1, 2024 by Mr. IU

Can't find a product?

Find it on Amazon first, then paste the link below.