Serious Mass - Chocolate Peanut ButterChocolate Peanut Butter | GNC

Optimum Nutrition Serious Mass


Item # 352140

Product Information



Serious weight gain requires serious calories. However, those who need the extra calories most often have the toughest time consuming enough of them. For many aspiring to be bigger, highly-active metabolisms, weaker appetites, and on-the-run lifestyles make consuming sufficient calories through whole foods alone a real challenge. With Serious Mass, you’ve got nothing to lose and lots to gain. We’ve consolidated over 1,250 calories, 50 grams of protein, 250-plus grams of carbohydrates, and 25 vitamins & minerals with added glutamine and creatine into every serving. It’s time to stop thinking small; get serious – Serious Mass.


  • 1,250 calories per serving in water; 1,630-plus calories when made with low fat milk.
  • 50 grams of protein from a combination of faster and slower digesting sources including Whey, Casein,and Egg.
  • 250-plus grams of carbohydrates to support fueling of intense workouts and aid in the replenishment of glycogen stores - with NO ADDED SUGAR.
  • Enhanced with Creatine, L-Glutamine & Glutamine. Peptides, Choline, Inositol, PABA, and MCTs.
  • 25 Vitamins & Essential Minerals with an emphasis on B-Vitamins and Antioxidants.


Nutrition Facts
Serving Size  2 Scoop(s)
Servings Per Container  16

Amount Per Serving     % DV

  Calories from Fat 70  

Cholesterol 95mg   32%
Sodium 430mg   18%
Potassium 1300mg   37%
Total Carbohydrate 249g   83%
Protein 50g   100%
Phosphorus 650mg   65%
Calories 1270  
Sugars 26g  
Total Fat 7g   11%
Saturated Fat 4g   20%
Iodine 175mcg   117%
Magnesium 170mg   42%
Zinc 18mg   120%
Selenium 70mcg   100%
Copper 1.2mg   60%
Manganese 2mg   100%
Chromium 200mcg   167%
Molybdenum 75mcg   100%
Vitamin A 5000IU   100%
Vitamin C 60mg   100%
Vitamin D 200IU   50%
Vitamin E 30IU   100%
Riboflavin 4mg   235%
Niacin 50mg   250%
Vitamin B6 5mg   250%
Folic Acid 400mcg   100%
Vitamin B12 10mcg   167%
Biotin 300mcg   100%
Pantothenic Acid 25mg   250%
Calcium 600mg   60%
Iron 8mg   44%

Creatine Monohydrate  1 g   **
L-Glutamine  500 mg   **
Glutamine Peptides  500 mg   **
Choline (as choline bitartrate)  250 mg   **
Inositol  250 mg   **
PABA (para-aminobenzoic acid)  5 mg   **

** Daily Value (DV) not established.
Other Ingredients
Maltodextrin, Protein Blend (Whey Protein Concentrate, Calcium Caseinate, Egg Albumen, Sweet Dairy Whey), Natural and Artificial Flavors, Vitamin and Mineral Blend Serious Mass™, Medium Chain Triglycerides, Lecithin, Acesulfame Potassium
Contains Milk, Egg, Wheat (Glutamine Peptides) and Soy (Lecithin) Ingredients.
Label (click image to enlarge)

How To Use

Add two (2) heaping scoops (scoop included) of Serious Mass to a large blender
filled with 24 fl. oz. of cold water or milk.
If desired, add ice and other ingredients (see side panel for suggestions);
cover and blend on high speed for 45-60 seconds - or until thoroughly mixed.
NOTE: New users may find it beneficial to begin with one half (1/2)
of a serving daily for the first week, gradually increasing
to one or more full servings several times a day.
Not for use by those with pre-existing medical conditions or taking any medications, those under the age of 18 or women that are pregnant or nursing.
Manufactured BY OPTIMUM NUTRITION, INC. 975 Meridian Lake Dr., Aurora, IL 60504


4.6 / 5.0
91 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
It's pretty good quality for the price.
Mixes well. I did have a little ? and stomach rumbling at first, but as you utilize the product this will subside. It's a little too early to give you my take on the results, but I'll be sure to let you know.
December 16, 2018
3 weeks ago
Great product, arrived earlier than expected
December 7, 2018
1 month ago
Wouldn’t drink any thing else. My son loves this. Has bee drink this for four years. Tried other drinks but goes back to this every time
December 3, 2018
1 month ago
Serious product
This product lives up to its name.
So if your not trying to gain mass or weight then use it for the protiens and vitamins.
December 1, 2018
1 month ago
Heaven sent
can’t remember how I found out about this product but I’m glad I did when I started taking this I couldn’t keep my weight over 100 pounds started working out and drinking two shakes a day and weigh about 115 I love this powder I mix mines with lactose free milk and fruits and it tastes really good. I wouldn’t switch to another powder this stuff is great
November 23, 2018
I like the product!!!!
I be using this product for about a month not consistently but I’m gained 12lbs. From 128 to 140! Ordering another supply soon
November 19, 2018
Really loving it so far, I use low fat milk instead of water for a thicker shake. I recommend milk instead and also drink it in the morning AND before you go to bed
November 14, 2018
1 month ago
So Far So Good
I just started taking the Serious Mass and 2 weeks ago and I’ve already seen results. I’m up 3 pounds so far and can’t wait to see how much more I’m able to gain. The vanilla flavor tastes great. I usually throw in a few strawberries or a banana, but it tastes great plain.
November 9, 2018
2 months ago
Best supplement I've used
No need to buy protein shakes or powder. This has everything I need
October 21, 2018
2 months ago
The best!
I love this products. Super delicious! I drink 2 shakes with whole milk and two scoops of peanut butter a day (morning and night) for extra calories and went from 102 to 114 in 3 weeks.
October 21, 2018
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 59 questions Browse 59 questions and 63 answers
Why did you choose this?
GNC Store
BEST TASTING PROTIEN I'VE HAD, works great I only take half of the recommened serving.
j c on Apr 9, 2015
BEST TASTING PROTIEN I'VE HAD, works great I only take half of the recommened serving.
j c on Apr 9, 2015
I am 16 years old, 134 lbs. I workout 3-5 days per week, I want to increase to at least 150 pounds by the end of August. When and how often should I drink this?
marcocast10 on Jun 7, 2018
BEST ANSWER: One serving everyday along with your meals
Does this help you get thick as well ?
Maymay on May 19, 2018
BEST ANSWER: No it didn't
Can I mix serious mass with GNC whey protein for getting better result?
A shopper on Mar 22, 2016
BEST ANSWER: I would not do that
okay, i just bought on serious mass, and i was wondering, how should i use it?

I workout 3x a week(Wednesday,Friday,Sunday) Should i only use it on the workout days? should i take it everyday?

And how many servings should i use ?(twice in the morning, twice after working out?)/

need help
A shopper on Mar 27, 2014
BEST ANSWER: You could start using it by adding two heaping scoops of Serious Mass to a blender filled with 24 oz. of water. Blend for 45-60 seconds. Then add a few ice cubes and, if desired, other calorie-contributing ingredients (see “Supercharge Your Serious Mass” below) and blend for an additional 30-45 seconds.

On the workout sessions; you can use it during post-workout, begin drinking ½ -1 serving of Serious Mass 30-45 minutes following exercise to support maximum recovery.

For best results use Serious Mass combined with intense weight training (3-5 times per week) and a sensible whole foods diet. Also, keep in mind that sufficient recovery. New users may find it beneficial to begin with ½ of a serving daily for the first week and then gradually increase to 1 or more full servings several times a day.

You can take it between meals, drink ½ -1 serving of Serious Mass between meals to maintain positive nitrogen balance and support a high-calorie diet, and before bedtime, drink ½ -1 serving of Serious Mass about 45-60 minutes before bed to provide nutrients to recovering muscle throughout the night.
Can this product be used by females who are looking to put on some extra mass?
A shopper on Oct 25, 2013
BEST ANSWER: Yes, this product can be used by females.
hi im 18 years old im 6 in height and i weigh about 155 would you recommend this product to gain weight
A shopper on Aug 4, 2013
BEST ANSWER: This product delivers a lot of calories in a healthy form for those looking to bulk up but not looking for fat.

I want to know that Serious Mass Contains Lactose Or other Digestive Enzymes or not.?
A shopper on Sep 30, 2013
BEST ANSWER: Sorry, I do not see lactose or digestive enzymes on the label for this product.
How well will it digest in the body from felling so full?
Phyllis R on Mar 16, 2018
BEST ANSWER: I feel full immediately afterwards, but usually within 2-3 hours I feel normal and get my appetite back. Everyone’s different, you can also adjust the amount of powder you use or split it into two separate shakes to drink at different times of the day rather than one big filling one.
How many calories is in one scoop?
youuloveang on Apr 3, 2018
BEST ANSWER: 635 in One Scoop
Is it possible to bulk up using mass gainer while you’re 13 yr old?
BashdiBALDI on Jun 1, 2018
BEST ANSWER: If by mass gainer you mean some sort of protein like whey‚ then yes you can bulk up. However since you are only 13 your body is still growing and your metabolism is still very high. You'll have to make sure to have a good healthy diet which is high in protein along with the mass gainer to make sure it works to its fullest potential. Foods such as nuts‚ fruits‚ berries‚ eggs‚ wild salmon not farm raised‚ leafy greens and chicken will be a great start for a healthy diet.
I am 108 trying put on 20 pounds will this be the right product for me ?
A shopper on Oct 23, 2018
BEST ANSWER: If you have a high matabolism then yes. But don't just use this product and think that's all you need. Just keep eating and eating.. you need more intake than outtake to gain weight.
How much protein and how many calories would be present per serving if used with whole milk?
A shopper on Aug 6, 2014
BEST ANSWER: It would contain 82 grams of protein and 1688 calories.
My husband cannot have vitamin K. Is there any in this product?
A shopper on Sep 19, 2013
BEST ANSWER: There is no vitamin K listed for this product.
Hi, i was wondering if this product actually works.... if so would you recommend it to a friend?? (im a skinny 15 yrs old) i want to gain weight. plzz any1 help.....
A shopper on Apr 15, 2010
BEST ANSWER: yes man this things works like crazy i was taken it for a month and gaining weight like with every weight gainer you release more..meaning ull have to sh$ to over come that ull have to take it reguarly and dont drink alot like that containor says...i just too it n the mornin and after my workouts everyday....with u bein 15 u might not go to the gym like i do b/c im n the military so honestly its best if you just take it a night will have to s#*t n the mornin but with ur body resting for 8hrs that plenty of time for it to work,,,like a said once ..u will have to use the bathroom but once ur body gets use to it ull luv it....
Does it taste better with milk or water?
A shopper on Nov 2, 2018
BEST ANSWER: I make mine with milk to give it more power. I also didn't enjoy the taste of it with water. So definitely milk.
What flavor do you recommend?
A shopper on Jun 18, 2018
BEST ANSWER: Natural Vanilla
Does the mass gainer affect facial problem such as acne and does it affect growth?
BashdiBALDI on Jun 1, 2018
BEST ANSWER: I imagine the large amount of sugar would have a negative effect on your acne.
What's the best way to mix it? Like should I use a blender, or maybe a blender bottle?
Akshay S on May 30, 2018
BEST ANSWER: I use a blender bottle. Unless I'm adding ice cream or frozen bananas and ice, then I use a blender.
I have two blender bottles so I use both shakers/balls in whichever cup I'm using to help mix it better!
I dont like the taste of the chocolate flavour, is there anything i can do to disguise the taste?
A shopper on Mar 12, 2018
BEST ANSWER: Use milk not water! It makes it creamier! You can add whatever you'd like. Ice cream, honey, peanut butter, fruit(bananas).. Which also adds more calories.. Hope this helps!
How many times a day was the best to take this?,and what is the best time?
A shopper on Mar 3, 2018
BEST ANSWER: In the morning with a meal and after a workout.
How many times a day is it suppose to be taken?
Crystal S on Oct 3, 2018
BEST ANSWER: Begin taking it one time and then two times a day
Where can I got this product?
Teklit W on Sep 9, 2018
Would you recommend this for diabetics?
Berge on Aug 25, 2018
BEST ANSWER: Probably no the main reason why is the high level of sugar that’s in this product. I would recommend you speaking to your doctor before buying any supplement product because the negative impact it can have on your health.
Can I take only 1 scoop since I casually work out? will it work as good?
A shopper on Aug 16, 2018
BEST ANSWER: I’d say yes, I did and i still put in a great amount of weight fast.
Can I add sugar to the mix and still come out with the same results?
Tanek on Aug 5, 2018
BEST ANSWER: To me its already sweet putting sugar in it in my opinion will be too sweet
Can you be under 18 to consume this?
Gianny V on Aug 4, 2018
BEST ANSWER: Its not recommended for people under 18
Is product safe for animals? (Dogs)
A shopper on Aug 2, 2018
Can a 13 yr old use this and I want to bulk up for competition??plss helppp
BashdiBALDI on Jun 2, 2018
BEST ANSWER: I would highly suggest against it. The product recommends 18 and older for a reason. If you want to bulk up for a competition, stick to natural proteins and high calorie diets.
Does using this affect any acne when u are 13 yr old??pls help
BashdiBALDI on Jun 2, 2018
BEST ANSWER: This product is not recommend for people under 18
What can you take to avoid s
tomach pains darts issues?
A shopper on Apr 17, 2016
BEST ANSWER: If you're having stomach pains, you should probably adjust your diet, it can also be caused by dehydration.