Last Chance! MEMORIAL DAY FLASH DEALS! It’s the final hours to shop exclusive buy 1 get 1 free deals and more!
7 Day Customer Support
  • Live Chat
  • 1-800-537-9910
USD
Serious Mass

Optimum Nutrition Serious Mass

An Product
High Quality Mass Gainer with 50g of Protein
  • 25 vitamins & essential minerals
  • 50g protein blend for feeding muscles
  • Supports growth and recovery with creatine and amino acids
  • Over 250g carbs to help fuel workouts
M&S Rewards Logo
Muscle & Strength Rewards

Earn 2 points for every dollar you spend at Muscle & Strength! Spend your points on order discounts, fitness gear and exclusive products.

M&S Promos and Deals Logo
Unbeatable Deals

We run the best deals and discounts on the biggest nutrition and fitness brands!

M&S Delivery Truck
Free Shipping on $99+ Orders*

Spend $99 to get FREE shipping in addition to our unbeatable deals! Plus, 100% money-back guarantee on every product we sell.

*USA Only. Excludes: AK, HI, orders above 25lbs and bulk orders.

Credit Card Logo for Refunds
60 Day Guarantee

Not happy with your purchase? No problem. Simply return it to us within 60 days and we'll replace it, credit your account, or give you a full refund.

Mobile Phone Logo
Contact Us

If you have any questions about products please call us on 1-800-537-9910 or email support@muscleandstrength.com

Buying Options
$49.99 49.9900
6lbs
8 Servings | $6.25 Per Serving
+
$89.99 89.9900
12lbs
16 Servings | $5.62 Per Serving
+
 
Secure Transaction
Nutrition Info

6lbs Banana

Serving Size: 2 Heaping Scoops (340g)
Servings Per Container: 8
Amount Per Serving
Amt
%%DV
Calories
1260
Total Fat
5g
6%*
Saturated Fat
3g
15%*
Cholesterol
200mg
63%
Total Carbohydrate
253g
92%*
Total Sugars
31g
Includes 10g Added Sugars
20%
Protein
50g
100%*
Vitamin C (as ascorbic acid)
60mg
67%
Vitamin D (as cholecalciferol)
5mcg
25%
Vitamin E (as d-alpha tocopheryl succinate)
20mg
133%
Thiamin (as thiamin mononitrate)
4.8mg
400%
Riboflavin
4mg
308%
Niacin (as niacinamide)
50mg
313%
Vitamin B6 (as pyridoxine hydrochloride)
5mg
294%
Folate (as folic acid)(400mcg folic acid)
680mcg DFE
170%
Vitamin B12 (as cyanocobalamin)
10mcg
417%
Biotin (as d-biotin)
300mcg
1000%
Pantothenic Acid (as d-calcium pantothenate)
25mg
500%
Calcium (as calcium citrate, dicalcium phosphate)
550mg
42%
Iron (as ferrous fumarate)
6mg
33%
Phosphorus (as dicalcium phosphate, dipotassium phosphate)
500mg
40%
Iodine (as potassium iodide)
52mcg
35%
Magnesium (as magnesium aspartate)
125mg
30%
Zinc (as zinc citrate)
15mg
136%
Selenium (as selenomethionine)
70mcg
127%
Copper (as copper gluconate)
1mg
111%
Manganese (as manganese amino acid chelate)
2mg
87%
Chromium (as chromium polynicotinate)
120mcg
343%
Sodium
670mg
29%
Potassium
1280mg
27%
Creatine Monohydrate
3g
* % Daily Value is based on a 2,000 calorie diet. Your daily values may be higher or lower based on your calorie needs.
† Daily Value (DV) not established.
Ingredients
Other Ingredients: Maltodextrin, Whey Protein Concentrate, Natural and Artificial Flavor, Sunflower and/or Soy Lecithin, Malic Acid, Acesulfame Potassium, Sucralose, Yellow 5.
Allergen Warning
Contains Milk and Soy (Lecithin) Ingredients.

Mix 2 scoops of the powder into 24 fluid ounces of cold water or milk using an electric blender. This allows to you add in fruits, peanut butter and other calorie-contributing foods.

TIP: New users should start with a 1-scoop half serving. Use post-workout and/or between meals to add calories, carbs and protein to your healthy, balanced diet.

Keep out of reach of children. Do not take this product if you are pregnant or nursing a baby. Check with a qualified health care professional before using this product if you are under 18 years of age or if you have any known or suspected medical condition(s) including diabetes, hypoglycemia, and/or if you are taking any prescription or OTC medication(s).

Directions
Warnings
Expand Info
Product Information

Serious Mass Banner showing man sitting outside on grass holding containter - For Muscle Building & Weight Gain*

Optimum Serious Mass

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.

Serious Mass Features:

  • Adding Calories has Never Been this Easy or Tasted So Good
  • 1,250 High Quality Calories per Serve
  • 50g of Blended Protein
  • Over 250g of Carbohydrates to Help Fuel Workouts
  • Enhanced with Creatine and Amino Acids
  • 25 Vitamins and Essential Minerals

We've consolidated over 1,250 calories, 50 grams of protein, 250-plus grams of carbohydrates, and 25 vitamins & minerals with added aminos and creatine into every serving. Serious Mass provides you with the tools you need to pack on the pounds and - when coupled with serious weight room effort – develop your physique to the fullest. It's time to stop thinking small; get serious - Serious Mass!*

Serious Mass at a Glance - What: 1,250 Calories
Reviews
Overall Rating
4.7 out of 5 stars
Reviews (632)
Verified Buyers (599)
Review Graph
  • 5 star
    79%

  • 4 star
    17%

  • 3 star
    2%

  • 2 star
    1%

  • 1 star
    1%

Top Rated Flavors
  • Chocolate (4.8/5 )
  • Banana (4.7/5 )
  • Vanilla (4.6/5 )
  • Chocolate Peanut Butter (4.6/5 )
  • Cookies & Cream (4.6/5 )
  • Strawberry (4.5/5 )
  • Show More +
    Show Less -
Overall Rating
  • Vanilla
  • Show More +
    Show Less -
User Image
FOCUSED FITNESS 242
Increase Strength
Verified Buyer
My female client went from 117 to 137lbs in a year. This along with her strength and conditioning program really transformed her body.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-05-30 14:28:30Z
Loading
Overall Rating
  • Chocolate
  • Show More +
    Show Less -
User Image
Orrion B
Verified Buyer
Perfect flavor. I subscribed to Optimum Nutrition recently and I’m sold.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-05-28 13:00:36Z
Loading
Overall Rating
  • Vanilla
  • Show More +
    Show Less -
User Image
Kelly
Verified Buyer
One of the best mass gainers on the market. Definitely up there. Very trustworthy and efficient*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-05-16 10:47:54Z
Loading
Overall Rating
  • Chocolate
  • Show More +
    Show Less -
User Image
DenM
Verified Buyer
I use this product mainly for making homemade protein bars. As a shake it's good, but can be thick with the reccomend scoops.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-03-24 13:50:04Z
Loading
Overall Rating
  • Strawberry
  • Vanilla
  • Show More +
    Show Less -
User Image
Ravi B
Verified Buyer
A mass gainer that never lets down.... pack on that additional weight thats neededl...*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-03-23 11:32:15Z
Loading
Overall Rating
  • Strawberry
  • Show More +
    Show Less -
User Image
Samuel H
Verified Buyer
One of my all-time high favorite favors of serious mass gainers. I can literally drink it all day!*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-02-28 06:39:25Z
Loading
Overall Rating
  • Strawberry
  • Show More +
    Show Less -
User Image
Jean Paul F
Transformation
Verified Buyer
The Strawberry flavor is the best I have ever had. When it comes to the product, having to do 2 big scoops every time is not really what I was looking for. It can be a bit too much for your stomach to handle. However, that is the whole point of a mass gainer. Just not for me. But I recommend it if you do a lot of exercise and eat a healthy diet.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2022-08-15 15:07:50Z
Loading
Overall Rating
  • Chocolate Peanut Butter
  • Show More +
    Show Less -
User Image
Patrick G
Verified Buyer
It works well the results are good,but not so much the flavor*
Was this helpful?
You found this not helpful
1 of 1 found this helpful
2022-08-07 00:15:01Z
Loading
Overall Rating
  • Chocolate Peanut Butter
  • Show More +
    Show Less -
User Image
ZACHARIAH T
Verified Buyer
ON is my go to as it's not chunky and the peanut butter chocolate is my favorite*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2022-07-13 04:50:46Z
Loading
Overall Rating
    Show More +
    Show Less -
User Image
Mahmoud Z
Build Muscle
It's so far away from strawberry flavor besides it doesn't isolate well. May be it's near expired*
Was this helpful?
You found this not helpful
1 of 1 found this helpful
2022-06-10 08:46:06Z
Loading
Loading
* Muscle & Strength does not imply any medical claims from this review. There are no guarantees of specific results and results may vary.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Which products should we notify you about?


  • Loading product choices...
Text Message Alert
+1