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Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Chocolate Peanut Butter, 12 Pound (Packaging May Vary)

  • Based on 52,238 reviews
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Availability: In Stock.
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Arrives Tuesday, May 20
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Flavor Name: Chocolate Peanut Butter


Size: 16 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
  • 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: Chocolate Peanut Butter


Servings per Container: 16


Item Weight: 12 Pounds


Material Type Free: Caffeine Free


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 11.5 x 5.5 x 16 inches; 12 Pounds


Item model number ‏ : ‎ 1056371


Date First Available ‏ : ‎ December 18, 2013


Manufacturer ‏ : ‎ Glanbia Performance Nutrition


Country of Origin ‏ : ‎ USA


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, May 20

This item is non-returnable:

Non-returnable due to Food safety reasons

View our full returns policy here.

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Top Amazon Reviews


  • Great! Best results with exercise.
Flavor Name: Chocolate Size: 16 Servings (Pack of 1)
I gained 15-20 pounds in a month. No signs of slowing down. I am male, 5’10” and have floated around 160-165 pounds for years because of a fast metabolism and an inconsistent appetite. That weight gain came after using about one bag of protein powder + regular meals. I use one serving (2 scoops) per day (with a few missed days bc…life), but I use very scant scoops (helps it lasts longer). I *highly* recommend using a blender to mix this thoroughly. I use my simple Nutri Ninja Pro. When you’re done blending, pour the shake in a cup and clean the blender immediately every time to make your life easier tomorrow. It’s much tastier blended with ice (about 1/2 cup) to dissipate the sweetness – it’s also more refreshing with little pockets of cold. I use whole milk instead of water, about 3/4 cup. Blend in more milk until the consistency is acceptable to you, like a milkshake rather than like pudding (eck). It’s kind of a heavy drink and sometimes makes it difficult to eat other food, so I usually try to drink just 1/2 in the morning, stick the rest in the fridge, and drink 1/2 at night. ~~ I’m noticing full body gains, but most prominently in my legs (thighs and glutes) and arms. It seems to be mostly muscle. I highly recommend adopting a regular exercise routine, including weights, for the best results with this. I think working out helps ensure your gains are in line with the physique you want, if you have physique goals. I started doing StrongLifts 5x5, which only requires 3 workouts per week. Takes about 45 minutes and it’s 3 basic compound movements/lifts per workout, done every other day. I swim laps on 3 of my “off” days with one completely off day. So, I’m always getting a full body workout, although SL 5x5 has you squat in every workout, and that really develops the lower body – and, conveniently, working your lower body enhances the rest of your body’s growth. Do whatever you want, but it’s nice to keep it simple and consistent. ~~ That’s about it. Drink plenty of water (it can dehydrate you in the beginning) and get enough sleep. This stuff works well. ... show more
Reviewed in the United States on August 27, 2022 by Robert B.

  • Great taste, would recommend
Flavor Name: Vanilla Size: 8 Servings (Pack of 1)
It tastes like melted ice cream in my opinion. It mixes well, and the value is great comparatively.
Reviewed in the United States on October 19, 2024 by Nick McCarty

  • Great base for a smoothie
Flavor Name: Vanilla Size: 8 Servings (Pack of 1)
Its mild vanilla flavor goes well in the smoothies I make. Due to the long Covid I contracted, I've had difficulty eating solid foods, and the smoothies add the calories I need to maintain my weight. I just received my third order.
Reviewed in the United States on November 8, 2024 by John H. Terrell

  • I did gain
Flavor Name: Strawberry Size: 16 Servings (Pack of 1)
First of all I tried the vanilla and the chocolate flavor. Please do yourself a favor and only get the chocolate flavor. Listen, the chocolate flavor is the same in every other brand protein shake or mass gainer because they all use cocoa powder. So if you like chocolate you will not be surprise when you taste it. Compared to the vanilla one which has a very unique taste that I did not like. Just get the chocolate one. Also, the servings say two scoops but if you have not seen the scoop it is the same size as a detergent scoop. It is even hard to take it out of the bottle. One scoop is enough for one serving (625 calories). If you do decide to take two scoops space them out throughout the day. I do not recommend this though since you should be getting the rest of your calories and nutrients from real food. One scoop every day is fine though. Ok, so how did I mix it? I used a electrical blender. I have used a shaker bottle with the metal spring ball thing before since I did not have a electrical blender in my college dorm. But it taste much better if you blend it with an electrical blender because you will not have large clumps. Also, you can add other ingredients if you like such as peanut butter (chocolate flavor + pb taste freaking good just like reeses cup). Peanut butter adds more calories and protein to your shake. Do not take this mass gainer if you are not working out at least 3 times a week. You will simply gain a gut around your stomach area unless you are anorexic. Even if you are anorexic, you should still work out. And if you are like me and are still looking to add calories to your serving, add in 1 tablespoon of olive oil (120 calories), and you will not taste as long as you drink fast enough so the olive oil does not float up after you blend it. So my shake usually is 1 scoop (625 calories, 24g protein), 12fl oz of milk (225 calories, 12g protein), 2 tbsp of peanut butter (190 calories, 7g protein), 1 tbsp of olive oil (120 calories). Total of 1160 calories, 43g of protein (hopefully my math is correct). With all of that being said, I recommend to buy Optimum Nutrition 100% Whey Protein (Extreme Milk Chocolate flavor) instead of serious mass because this gainer has a ton of carbs. The first ingredient is Maltodextrin which is normally found in soda and candy. You save a lot of money also since the whey one has more servings. Last advice, use MyFitnessPal app if you have trouble gaining weight. Make sure you are actually hitting your calories goal. I used to think that I had a fast metabolism because I ate so much. But in reality after I calculated the calories, I was far away from hitting 3000 calories. I gave it 5 stars because it worked for me. I went from 145lbs to 160lbs in three months. Yes I gained fat but also muscle because I worked out. I no longer take this after finding ON 100% Whey. Much cheaper per serving, a better selection of flavors, and a lot less carbs. Yes, it might not have the calories but you can definitely create your own mass protein shake by using the correct ingredients. Google svunt shake if you need an idea of creating your mass gainer with whey protein (it has 1659 calories and 95g of protein). Have fun gaining. ... show more
Reviewed in the United States on January 4, 2024 by Heidi walls

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