Optimum Nutrition Serious Mass, Chocolate, 12lbs

Product Details

Serious Mass is the ultimate in weight gain formulas. With 1,250 calories per serving and 50 grams of protein for muscle recovery, this instantized powder makes the ideal post-workout and between meals shake for sizing up your goals. Serious Mass provides you with the tools you need to pack on the pounds and help you develop the physique you’ve always wanted.


  • Adding Calories Has Never Been This Easy or Tasted So Good
  • 1,250 CALORIES
  • Over 250 g of Carbohydrates with NO ADDED SUGAR
  • Creatine, Glutamine, and Glutamic Acid
  • 25 Vitamins and Essential Minerals

Suggested Use:

Add 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 and blend for an additional 30-45 seconds. TIPS: Mixing two scoops of Serious Mass with 24 fl. oz. of nonfat or low fat milk instead of water will give you a thicker, creamier, higher-calorie shake. daily for the first week and then gradually increase to 1 or more full servings several times a day.

  1. Emir9674
    4 reviews

    Harga Berpatutan

    4 out of 5, reviewed on November 22, 2018

    Harga yang ditawarkan di GNC serta lain lain kedai sangat berpatutan dengan kualiti yang bagus. Saya pernah mencuba jenis protein isolate yang mana rasanya sangat manis dan pekat. Sangat bagus dengan hasilnya. Terima kasih Optimum Nutrition untuk produk yang berkualiti.

  2. Build muscle in short time

    5 out of 5, reviewed on November 21, 2018

    The best mass protein that I have tried before. It helps me to gain my mass in short time. I was 53kg, after 3 pack of serious mass, my weight is 67kg now.

  3. Kit Yao Lee
    3 reviews

    Good taste and flavour

    5 out of 5, reviewed on October 19, 2018

    The taste is great and i always choose on chocolate flavour.

  4. Varon Chong
    3 reviews

    Good product, Very good for weight gain

    5 out of 5, reviewed on October 4, 2018

    The product taste sweet and nice
    Easy to use, can use it after gym
    I gain 2kg just in 1 months

  5. Justine Wu
    3 reviews

    Result proven & Good tasting!

    5 out of 5, reviewed on September 12, 2018

    What i like about this weight gainer is that it contains such a complete basic of nutrition that are high in protein and carbs,while loaded with vitamins and minerals. It is also added with a low ammount of creatine and some good ammount of glutamine which can promote faster muscle recovery. So far it is my 3rd bag and im loving it. The taste ive tried so far are chocolate and vanila flavour. I prefer the chocolate one as it taste alittle bit coco-ish (blackforest chocolate) while the vanila is kinda sweet for me. Although taste is subjective, I have gained more than 10kgs in just 3 months by taking only 1 serving from this bag per day. Of course i followed a high calorie diet which involves alot of meats, eggs, rice, veges n fruits and hits the gym 5 times per week. 1 serving is about 2 scoops of the powder and for me i break it down into 2 servings with 1 scoop each time. So 1 scoop i will take it after my workout and another one during snack time. On non-workout days i only take 1-2 scoops depending on my food intake. Compared to my last attempt in putting on gains, this time is much more faster and easier with serious mass which i highly recommend it to anyone. The results are unbelievably fast and visible. I have even change my closet because my size has increased. I can feel my jeans are getting tighter and shirt getting smaller. And it sure does amaze my friends and family and they always mentioned that i became buff, strong looking body now.

  6. Chee Yong
    3 reviews

    The Best Gainer

    5 out of 5, reviewed on August 9, 2018

    Excellent product, does exactly what it says on the tin. Tried the chocolate, chocolate peanut butter and banana. Taste wise chocolate is my favorite but all those 3 taste good. Gives plenty of energy, protein and vitamins/minerals. Can’t say I’ve tried any of the other brands but I don’t need to as this does exactly what I need, great stuff even if a bit pricey.

  7. akmalkamarul9893
    3 reviews

    Best of the best

    5 out of 5, reviewed on August 7, 2018

    for hard gainer who first time to try mass gainer. I’d recommend this, all nutrients is expertly combined. all type nutrition to help in terms of muscle growth, recovery, calories intake supports. all perfect. try vanilla so that u can consume in the morning as well if choc make u wanna take a poop hehe

  8. mananmajelis87
    3 reviews

    Best Supplement!

    5 out of 5, reviewed on July 30, 2018

    Best mass gainer and supplement for me. I only use for 4 weeks my weight is increased from 50kg to 54kg. Really good for bad-ass look body. The flavour also really delicous, for choclate lover like me. Highly recommend this mass gainer for any type of person no matter you are a beginner or a professional athlete.

  9. abx58
    3 reviews

    Good Quality and Taste good

    5 out of 5, reviewed on July 18, 2018

    This is a very good quality mass gainer and it is very suitable for who want to increase their weight.
    Besides, ON series mass have a good chocolate taste compare to others brand of product.

  10. harith_ikmal18
    3 reviews

    really good product

    5 out of 5, reviewed on May 29, 2018

    managed to gain 5+kg with this product in one month. didn’t follow the recommended amount. just took one scoop in the morning and one in the evening. both mixed with milk.

  11. Dakhaki67
    3 reviews

    Badan sado

    5 out of 5, reviewed on May 18, 2018

    Dulu sy kurus kingking macam papan. Orang ingat Saya ne penagih dadah. Mamber sy ajak pergi gym Dan disitu la sy kenal produk ini. Sebulan Saya guna prodak ini .badan Saya Naik 5 kg. Sekarang badan Saya sudah sado. Saya lebih yakin Dan percaya diri. Dan yang paling penting banyak awek yang kejar Saya sekarang..hehehe.

  12. Nin67
    3 reviews

    Good and Tasty

    5 out of 5, reviewed on May 17, 2018

    This was the second brand I tried for Mass Gainer. It’s simply tasty especially when added with milk/ ice cream. The 1st one after finishing it, I gained only 2-3 KGS. For this brand, I gained 5kgs. Now I can get it around RM169 and even though I don’t follow it’s serving size, I can still gain. Worth the price.

  13. wongkhonglok07
    3 reviews

    Effective, bad mixability

    4 out of 5, reviewed on March 6, 2018

    This was my first bag of weight gainer that i purchased, the result is sure and very depend on individual absorption and the surplus u added to your macro. I take half serving on the first 2 week and a full serving the following week. It did well in increasing lean mass for a hardgainer like me. But the mixabiliy for this product is not so good. Taste so far is ok.

  14. Keithloh01
    3 reviews

    Good taste

    5 out of 5, reviewed on March 6, 2018

    This is the best weight gainer I having before.
    The taste is good. After I eat this product, my body weight increased from 50kg to 55kg. It makes me feel more stronger and muscular than before.
    I would like to suggest this to others.

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