SKU: 42020739424

Optimum Nutrition Serious Mass 12lbs

Sale price$15750.00 Regular price$17500.00
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Description

Optimum Nutrition Serious Mass 12lbsOptimum Nutrition Serious Mass 12lbs Optimum Nutrition Serious Mass 12lbs is a premium high calorie mass gainer specially designed for hard gainers, athletes, and bodybuilders who struggle to gain size and muscle. With over 1250 calories and 50g of protein per serving, this powerful gainer provides everything your body needs to stay in a calorie surplus, build lean muscle, and recover faster after intense workouts. Packed with complex carbohydrates,

Optimum Nutrition Serious Mass 12lbs

Optimum Nutrition Serious Mass 12lbs is a premium high-calorie mass gainer specially designed for hard gainers, athletes, and bodybuilders who struggle to gain size and muscle. With over 1250 calories and 50g of protein per serving, this powerful gainer provides everything your body needs to stay in a calorie surplus, build lean muscle, and recover faster after intense workouts.

Packed with complex carbohydrates, essential vitamins, minerals, creatine, and glutamine, Serious Mass is the ultimate solution for anyone looking to bulk up effectively.


Key Features of Optimum Nutrition Serious Mass 12lbs

  • Over 1250 calories per serving

  • 50g of high-quality protein blend (whey, casein & egg protein)

  • More than 250g of complex carbs per serving

  • Enriched with 25+ vitamins and minerals

  • Includes creatine, glutamine & glutamic acid

  • Supports maximum size, strength, and recovery

  • 12lbs bag offers long-lasting supply for serious bulkers

  • Delicious flavors with easy mixability


Benefits of Optimum Nutrition Serious Mass 12lbs

1. High-Calorie Formula for Rapid Size Gains

With more than 1250 calories per serving, Serious Mass ensures you get the calorie surplus required for muscle growth and mass gain.

2. Advanced Protein Support

Each serving delivers 50g of protein from a high-quality blend, supporting lean muscle development, faster recovery, and increased strength.

3. Energy From Complex Carbohydrates

Over 250g of complex carbs fuel your body with sustained energy while replenishing glycogen stores after intense training sessions.

4. Enhanced Recovery & Performance

Infused with creatine and glutamine, Serious Mass helps reduce muscle soreness, improve recovery, and boost training performance.

5. Complete Nutritional Profile

Serious Mass contains 25+ vitamins and minerals to support overall health, metabolism, and energy production.


Nutritional Information (Per Serving – May Vary by Flavor)

  • Calories: 1250+

  • Protein: 50g

  • Carbohydrates: 252g

  • Fats: 4.5g

  • Creatine, Glutamine & Glutamic Acid included

  • 25+ Essential vitamins & minerals


How to Use Optimum Nutrition Serious Mass 12lbs

Mix 2 heaping scoops (approx. 334g) with 24–32 oz of water or milk. Blend until smooth and creamy. Consume 1–2 servings daily, depending on your calorie needs.

Best times to use:

  • Post-workout (for recovery & growth)

  • Between meals (to maintain calorie surplus)

  • Before bed (to fuel overnight recovery)


Who Should Use Optimum Nutrition Serious Mass 12lbs?

  • Hard gainers who struggle to put on size

  • Athletes in bulking cycles

  • Bodybuilders targeting rapid mass gain

  • Fitness enthusiasts needing extra calories & protein


Why Choose Optimum Nutrition Serious Mass 12lbs?

Optimum Nutrition is a globally trusted brand known for producing high-quality, science-backed supplements. Serious Mass is their flagship gainer formula, offering unmatched calorie, protein, and carbohydrate content in one shake. The 12lbs pack provides excellent value and is ideal for long-term bulking goals.


FAQs

Q1: How many servings are in Optimum Nutrition Serious Mass 12lbs?
The 12lbs bag provides approximately 16–18 servings.

Q2: Can beginners use Serious Mass?
Yes, it’s suitable for beginners and advanced athletes alike.

Q3: Can I take Serious Mass every day?
Yes, daily use is safe as part of a balanced diet and workout plan.

Q4: Can I use it as a meal replacement?
Yes, but for best results, combine it with whole foods for complete nutrition.

Q5: Does Serious Mass contain creatine?
Yes, it includes creatine, glutamine, and glutamic acid to enhance performance and recovery.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 42020739424

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4.0 ★★★★★
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Verified Purchase
Nyfan1
Bozeman, US
★★★★★ 5
Soft, Breathable Sheets That Feel Great to Sleep On
Size: Twin, Color: White
This Amazon Basics jersey sheet set was a really good purchase. The cotton material is soft, stretchy, and breathable — it feels like sleeping in a comfortable T‑shirt. The fitted sheet has a nice snug fit that stays in place, and the flat sheet is lightweight without feeling flimsy. The fabric washes well, doesn’t pill, and stays soft after multiple loads. It’s a great everyday sheet set for anyone who likes that cozy, relaxed jersey feel. Overall, comfortable, easy to care for, and great value for the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
C
Verified Purchase
Christopher
Chelsea, US
★★★★★ 5
The Perfect Sheets To Lie On While Writing Amazon Reviews
Size: Full, Color: Light Gray
As I write this, I am laying on an adjustable full sized bed by Hofish and a 10.5" comfort foam mattress by Classic Brands. I know I sound like I am an Amazon plant, but I swear I am not. I'm not even a stockholder anymore. This is the most awesome bed stylings combination I have had in many, many years. In fact, it is the best I have ever owned and it is beat only by some ritzy resort I stayed at on vacation like 20 years ago, though I admit I was pretty drunk the entire time so my memory might not be the most accurate. But getting back to today... these sheets are great. I washed them twice - I'm not a neat freak, I am just amazingly disorganized and easily distracted while doing laundry, so tonight they went though two wash cycles and one dry. And then I put them on the bed. While these sheets are not deep pocket sheets, they don't need to be with this mattress. There is enough room and border for them to tuck and wrap with the elastic to give a strong grip under the mattress, which is important as the adjustable frame continually put the sheets and mattress though its repeated adjustable calesthenics-type positioning. The other two sheet sets I have used since I got this bed have struggled poorly with this. In the day or so and at least a dozen position changes, these sheets stay in place with no popped corners to exposing the bowl as the head and feet rise. Of course, till will tell if it lasts, but so far they are the best of the batch of sheets in my closet. As for texture, they are awesome. I'm a dude. I don't really know what thread count or knit or whatever really means. But these sheets feel like a well-washed favorite, quality rock & roll concert t-shirt. And not one of these glitter puff stupid new groups, like a real rock band from the 80s that now charges $250 for a concert ticket and $60 for a t-shirt...but that group you saw back then, paid $10 for the shirt and you STILL have it and love to wear it because it is perfectly molded to your body, soft and reliable. The kind of shirt you will wear under your suit at work and just grin not just for mental middle finger to corporate dress codes, but because the t-shirt is just that great of a feeling. Well, that is what these sheets feel like. And now you get to sleep in it. It is that awesome. In LA right now we are having a nasty heat wave, but these sheets don't seem to bake me even with my stuttering AC. The flannel sheets I love seem to trigger the butt sweats as soon as I lay down in this heat, but no such problem with these. So really, I'm absolutely happy with these things. I am going to order more in other colors as soon as Amazon gets them back in stock. Great price, great quality, great comfort, great fit, great deal. It is that simple.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 3, 2017
M
Verified Purchase
Marellen Coley
Alexandria, US
★★★★★ 5
Soft smooth and wrinkle free!
Size: King, Color: White
The most comfortable sheets I’ve had in years! Soft and don’t wrinkle up in the bed. Some reviews said they are thin but I think they’re perfect! I don’t want super thick sheets as we are hot sleepers. These are the perfect feel. They also stretch very well to fit on my mattress all the way around and I have a thick mattress! My precious sheets were a struggle to get over the corners but these fit perfectly. Would buy 10 times over! Such a good value as well!
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Reviewed in the United States on April 14, 2026
J
Verified Purchase
Justice
Boise, US
★★★★★ 4
Soft Material, but Color Not as Expected
Size: Queen, Color: Oatmeal, Size: Queen, Color: Oatmeal
I did not open or use this sheet set because the color wasn’t suitable for the occasion I intended. I prefer to return items in unused condition so they can be resold as new, so I cannot comment on the exact fit. From a price point, it's value for money. From touching the fabric through the packaging, the material feels soft and of fair quality. There is no unpleasant smell, and the overall functionality seems fine based on its construction. My only disappointment is the oatmeal color—it looks somewhat dull and gives off an aged or slightly used appearance. I was hoping for a brighter, creamier tone. Aside from the color issue, the product appears to be well made and comfortable, which is why I’m giving it four stars.
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Reviewed in the United States on December 6, 2025
A
Verified Purchase
Anonymous
Battle Creek, US
★★★★★ 5
Nice and soft
Size: Queen, Color: Chambray
Update: I’m very happy with this sheet set! I’m currently only using the fitted sheet as I don’t have a need for the top sheet or pillow cases right now. It hasn’t popped off the mattress at all like the previous cheep sheet I had. Original post: The sheet set arrived today. Haven’t actually tried it yet because I need to wash it first. From I can see, looks great. Once it’s washed and on my bed, and can figure out how to update my review I will do so accordingly. It’s soft like most people have said and the color is nice, though they didn’t have my favorite color purple in a shade I like so I got the ‘fancy blue’ (don’t remember the actual name of the color) because I desperately needed a new sheet of quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 1, 2026

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