Serious Mass Review – Is This Mass Gainer Worth The Purchase?

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By Leslie Waterson

Reviewed by Juliana Tamayo, MS, RDN - Last Updated

Serious Mass Review

If you are in the bulking phase, then the goal would be to gain weight. However, you want to gain weight with muscle (not just fat). It takes a high protein, high-calorie diet to get started with bulking, but that might not be enough, especially when you are not consuming enough protein and calories to gain the amount of muscle mass you desire. Thankfully, there are mass gainers out there that can pick up the slack and give you that daily amount that you need to meet your goals quickly.

With so many mass gainers on the market, such as Dymatize Super Mass Gainer, how do you know which will help you reach your goals? That’s where Serious Mass comes in.

Serious Mass lives up to its name, and you’d be hard-pressed to find something quite like this if you are looking for a mass gainer. This is for the hardcore gainers and bodybuilders that want nothing more than to build some serious muscle mass (hence the name). If you are in the market for something that will go beyond your regular protein powder, Serious Mass could be exactly what you are looking for. Let’s learn more about this mass gainer with our review of Serious Mass.

Serious Mass by Optimum Nutrition

What Is Serious Mass?

Serious Mass is a high protein weight gain powder made and produced by Optimum Nutrition, the same makers as Opti-Men and Essential Amin.o Energy.

This supplement is more than a regular protein powder. In fact, it has more than enough protein, calories, and BCAAs that will support exponential muscle growth. This is for those who work out for that hardcore muscle gain. You might be a bodybuilder or have long struggled with gaining muscle mass. Either way, you need a mass gainer that has all the necessary ingredients that you need to build a body that is a lean, mean machine. Serious Mass comes in great tasting flavors, so you won’t be drinking anything that is bitter or leaves any kind of nasty aftertaste.

If you are looking for a great source of protein, vitamins, minerals, and BCAAs, among others, then you’re going to love Serious Mass. This is a mass gainer worth checking out for yourself if increased muscle mass is your ultimate fitness goal.

Serious Mass by Optimum Nutrition pack

Serious Mass Advantages

  • Comes in different flavors
  • Tastes great
  • Easy to mix
  • Contains plenty of BCAAs for muscle building
  • Packed with plenty of protein and calories
  • Great for hard gainers and bodybuilders
  • Plenty of essential vitamins and minerals
  • Perfect for post-workout shakes or in-between meals


  • May trigger some side effects
  • Not suitable for weight loss

Who Makes Serious Mass?

Serious Mass is made by Optimum Nutrition. The company is currently based in Downers Grove, Illinois. Optimum Nutrition also makes other high-quality products that focus on various areas of health. They are known for making protein powders, mass gainers, pre-workouts, post-workouts, multi-vitamins, fat loss supplements, and more. They also have their own line of apparel for those looking for the perfect attire to wear at the gym. Optimum Nutrition has received high praise from those who are serious about meeting their fitness goals. And the customer reviews and ratings show it. If you are looking for great quality products and supplements, Optimum Nutrition might be the brand worth checking out.

Optimum Nutrition logo

Serious Mass Ingredients

Serious Mass contains the following ingredients: carbohydrates, protein, vitamins and minerals, glutamine, and creatine.

How Does Serious Mass Work?

To use Serious Mass, you’ll need to fill a blender with 24 ounces of water. Then you’ll need to add two scoops of Serious Mass. You’ll need to run the blender for 60 seconds. If you want to add more flavor, you can add more fruit to the mix. Also, you’ll need to add some ice cubes in order to make the perfect smoothie.

There are three ways to take Serious Mass. It can be taken after a workout, in-between meals, or before you go to bed. But the instructions will be somewhat similar to each other. If you are drinking it after a workout, you’ll need to wait 30 to 45 minutes until you have finished your workout. If you are taking it in between meals, you’ll need to take a half scoop of Serious Mass instead of the regular two scoops. Finally, if you are planning on drinking Serious Mass before bedtime, then the two scoops serving will apply here. You’ll need to drink it at least one hour prior to bedtime.

For the best results, you’ll need to allow 48 hours for recovery. For example, if you are focusing on your upper body, that will mean doing only lower body workouts or completely resting within that 48 hour period. This will also lead to the proteins and amino acids to repair any muscle tears from your previous workouts. Recovery is all part of the growth process, and you’ll want the best results possible.

The amount of calories and protein in these two scoops is the equivalent of three hamburger and fries meals. So you will gain weight in muscle so long as you are following a rigorous workout plan that will allow for muscle growth. So if you are looking to bulk up, a mass gainer like this is exactly what you need.

Serious Mass by Optimum Nutrition powder

Is Serious Mass Safe?

Mass gainers contain ingredients that can trigger common side effects. Those who have used Serious Mass have reported the following: nausea, cramps, bloating, upset stomach, diarrhea, gas, and irritability.

Where To Buy Serious Mass

You can purchase Serious Mass directly on the Optimum Nutrition website. You can get a 6-pound container for $34.99 or a 12-pound container for $50.99. If you are purchasing it from another online vendor, note that the price may change.

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Serious Mass: Is It Worth It?

If you are serious about gaining muscle mass, then obviously, Serious Mass is worth the investment. This might just be one of the best weight gainers that bodybuilders and hard gainers can rely on. Especially when they need the essential amino acids, protein, and calories to help speed up the process. The more you get, the better the chance your muscles will grow in size. If you are a strength trainer or bodybuilder, a mass gainer is a must. And you’ll have plenty of servings in one container that will help meet your fitness goals.

Overall Rating:
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Leslie Waterson

Leslie has been passionately involved in the health and fitness industries for over a decade. She is constantly reviewing the latest scientific research and studies in order to take a research-backed approach to lifestyle optimization. Her main areas of interest include nutrition and supplementation. Leslie shares her findings on Fitness Clone to help other health enthusiasts choose the products and routines that will help them achieve their goals.