Crazy Nutrition Mass Gainer Review – Is It Right For You?

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By Jack Cincotta, MS

Reviewed by Juliana Tamayo, MS, RDN - Last Updated

crazy nutrition mass gainer review

Do you want to stack on slabs of muscle in a hurry?

Then I’m betting you’ve seen (or have even tried) mass gainers before. These are some pretty popular supplements for lifters and athletes because they are promoted as an easy way to shovel in hundreds of calories, protein, and nutrients. 

But, there’s just one thing. Sometimes, these mass gainers aren’t filled with, shall we say, “clean ingredients”.

And oftentimes they can leave you feeling bloated. Or worse, you may just shoot it out the other end…

That’s why, just like with any product, it’s important to get a QUALITY mass gainer.

And one product we found that might just fit the bill is Crazy Nutrition Mass Gainer. Keep reading our Crazy Nutrition Mass Gainer review to see if this supplement really is a top choice for packing on pounds!

About Crazy Nutrition Mass Gainer

Crazy Nutrition Mass Gainer is a powerful muscle mass complex made and produced by supplement company, Crazy Nutrition. In addition to Mass Gainer, this company has produced a wide variety of other supplements, such as Crazy Nutrition Intensive Pre-Train, Tri-Protein, and Ultimate CRN-5.

Crazy Nutrition Mass Gainer is designed to help users pack on size, increase muscle, and boost recovery.

Each serving comes loaded with about 500 calories, 40g of protein, and 55g of clean carbs. Crazy Nutrition wanted to formulate this product with only pure ingredients. Which is why they offer oat flour as the primary carb source, and whey and milk protein concentrates for the protein.

crazy nutrition mass gainer

On top of that, Crazy Nutrition Mass Gainer contains digestive enzymes to minimize bloating. And there’s also critical minerals to support workout recovery. 

Overall, Crazy Nutrition Mass Gainer is promoted as a highly effective formula for people who want to gain weight fast, yet without any blood sugar spikes, gas, or bloating.

Crazy Nutrition Mass Gainer Benefits

The main claimed benefits of Crazy Nutrition Mass Gainer are:

  • Increased Muscle & Body Size
  • Improved Workout Recovery
  • Enhanced Strength & Energy
  • Better Digestion & Absorption

Increased Muscle & Body Size

If you’re on a bulking program, it can be tough to consume thousands of calories per day, especially if they’re all from whole foods. This can be mentally and physically draining, whether that’s from the boredom of eating so much of one food, the chore of prepping another meal, or simply the inability to take another bite. 

Crazy Nutrition Mass Gainer claims to be a highly effective product for increasing muscle mass and body size. The formula offers 500 calories, 40g of protein, and 55g of carbs per serving, all in liquid form, to provide your body with quick, convenient nutrients. 

You can use it as a standalone meal or as an addition to your regular meals when you can’t eat any more solid food.

Enhanced Strength & Energy

When you go on a bulk, you don’t want your strength to stall or energy levels to go down. After all, that means you’re not providing your body with the right nutrients. Because if you’re doing it right, you should definitely see a strength and energy boost while on a bulk. 

And Crazy Nutrition Mass Gainer is designed to feed your muscles and entire body with the nutrients they need for strength and energy. Packed with 40g of protein and slow-digesting carbs, this formula may promote gains in strength and power while also giving you the energy you need to push harder, for longer.

Improved Workout Recovery

Gains can be negatively impacted by poor recovery. You can train as hard as you want, but if you aren’t recovering well, you won’t see as much growth. 

Crazy Nutrition Mass Gainer claims to improve workout recovery by flooding your muscles with high-quality carbs, protein, and even critical minerals such as zinc and magnesium. These may all work together to help you recover from intense lifting and get ready for another growth-inducing workout.

Better Digestion & Absorption

Many mass gainers can leave lifters feeling bloated or gassy. Not to mention that some products are filled with high glycemic carbs, which can spike insulin if consumed with nothing else besides it.

But Crazy Nutrition Mass Gainer is designed to be a clean formula that promotes better digestion and absorption. The formula contains a variety of digestive enzymes to help your body break down and absorb all of the nutrients. Plus, they use a slow-release carb to make sure you properly get all the benefits of the carbs, without causing a blood sugar spike.

These benefits make Crazy Nutrition Mass Gainer seem like a top dog. But is it actually the one you should have in your stack?

Read on to find out!

Crazy Nutrition Mass Gainer Ingredients

Crazy Nutrition Mass Gainer contains several ingredients. Below are the main, active ones:

  • Oat Flour
  • Whey Protein Concentrate
  • Milk Protein Concentrate
  • MCT Oil Powder
  • Black Pepper Extract
  • DigeZyme
  • AstraGin
  • Vitamin B12
  • Vitamin B6
  • Zinc
  • Magnesium
crazy nutrition mass gainer ingredient

Oat Flour

Oat flour is a high-quality source of complex carbohydrates, which makes it a valuable ingredient for boosting energy levels. It also provides many antioxidants, vitamins, and minerals found in regular oats. 

Plus, oat flour is digested relatively slowly, which limits a blood sugar spike and may enhance nutrient absorption. 

Whey and Milk Protein Concentrates

Crazy Nutrition Mass Gainer also has whey protein concentrate and milk protein concentrate.

Both of these protein sources are rich in essential amino acids. And they’re also high in branched-chain amino acids (BCAAs), so they provide a number of nutrients for boosting muscle protein synthesis. Plus, they both have a high bioavailability (meaning easily utilized by the body).

Whey protein is generally digested faster, whereas milk protein contains more casein than whey and is digested a bit slower.

Regardless, whey protein and milk protein are beneficial for increasing muscle mass, improving recovery, and boosting strength, mainly due to their ability to help you reach your target protein requirements. 

MCT Oil Powder

MCT oil is composed of medium-chain triglycerides, which are fatty acids. This ingredient provides a healthy fat source and may offer some benefits for energy levels. 

Black Pepper Extract

Black pepper extract contains a compound called piperine, which increases the bioavailability of other ingredients. 

It may also help to increase digestive enzyme production, which could reduce bloating, gas, and other side effects you don’t want!


DigeZyme is a trademarked digestive enzyme formulation. It includes amylase, lipase, protease, cellulase, and lactase. 

Basically, all of these digestive enzymes work together to digest various nutrients, such as carbs (amylase), protein (protease), fats (lipase), and lactose (lactase).

This may minimize any digestive symptoms. And this is particularly helpful when using a mass gainer considering all of the extra nutrients consumed; not to mention the protein in Crazy Nutrition Mass Gainer comes from milk, and some people have a hard time digesting the lactose in it.

So, DigeZyme might be able to minimize or eliminate gas, bloating, or stomach discomfort that often happens with bulk gainers.


AstraGin is a trademarked form of astragalus root and Panax ginseng root extracts. This formula may increase the digestion and absorption of other nutrients while also minimizing gas and bloating. 

Vitamins B12 and B6

Vitamins B12 and vitamin B6 are two key B-complex vitamins. They help to convert the food you eat into energy, so this could be valuable particularly when you’re bulking up and eating more food than normal.

Zinc and Magnesium

Zinc and magnesium are both essential minerals. They offer a number of benefits relevant for bodybuilders, such as testosterone and hormonal support, inflammation control, and stress reduction.

And there is some evidence that taking zinc and magnesium together can increase testosterone and boost strength and power. 

Does Crazy Nutrition Mass Gainer Work?

Crazy Nutrition Mass Gainer should likely help you pack on muscle.

It is filled with healthy carbs, fats, and protein to help give you energy, nourish your muscles, and provide your body with the calories it needs to grow.

crazy nutrition mass gainer feedback

We also like the inclusion of black pepper, AstraGin, and DigeZyme to minimize any gut symptoms and improve digestion and absorption. 

The zinc and magnesium included in this formula may also help, but they use oxide forms for both, which isn’t very well used by the body. 

Overall though, Crazy Nutrition Mass Gainer is a quality supplement that can help you put on muscle when combined with a high-calorie diet filled with enough protein and other nutrients.

Who is Crazy Nutrition Mass Gainer Best For?

Crazy Nutrition Mass Gainer is best for lifters, bodybuilders, athletes, and anyone who wants a quality mass gainer that offers digestive support. 

It seems to be a good choice if you need to get in extra calories each day, yet often struggle with bloating or stomach discomfort from calorie-dense shakes. 

crazy nutrition mass gainer

Get up to 30% OFF

Crazy Nutrition Mass Gainer

  • Formula includes oat flour, whey protein concentrate, milk protein concentrate, and more
  • Made in an FDA-approved, GMP-certified facility
  • Benefits muscle size, recovery, energy, strength, and digestion

How Does Crazy Nutrition Mass Gainer Compare?

In general, Crazy Nutrition Mass Gainer is one of the better products.

It comes in at 500 calories and 40g of protein, which is right in line with most other mass gainers. It’s a bit lower in calories and carbs than some other products, which isn’t inherently a bad thing. But if you want a particularly calorie-rich and high-carb supplement, you could go with something like Naked Mass or Muscle Tech 100% Mass Gainer.

Also, Crazy Nutrition Mass Gainer checks in at $4.50 per serving (for the regular price), which is a bit more expensive than some other formulas. But it’s still within a reasonable range, and you have to consider how many calories and nutrients you’re getting too. 

Lastly, Crazy Nutrition stands apart from most products because it uses digestive enzymes, black pepper, and AstraGin to boost absorption. Some other gainers are starting to do this now, but it’s still not the norm. So we like to see this in Crazy Nutrition’s formula.

How to Take Crazy Nutrition Mass Gainer

The serving size of Crazy Nutrition Mass Gainer is pretty large. You are instructed to mix four scoops with 15 to 20oz of water either in a shaker (recommended) or a glass. 

crazy nutrition mass gainer how to use

You may also want to mix it with milk or a higher-calorie liquid for additional calories, if needed.

You can take it every day, whether that’s before or after a workout, in between meals, or even on its own as a meal replacement. 

Is Crazy Nutrition Mass Gainer Safe?

Crazy Nutrition Mass Gainer should be safe for most people to consume. Even with the digestive enzymes and other ingredients included, there’s always the possibility of digestive symptoms with supplements, such as bloating or upset stomach.

Other possible side effects are:

  • Headache
  • Anxiety, nervousness, trouble sleeping (from B vitamins)

Crazy Nutrition Ultimate CRN-5 is made in an FDA-approved, GMP-certified facility. It contains milk, but is suitable for some vegetarians

It doesn’t contain any artificial colors, preservatives, or fillers.

Where to Buy Crazy Nutrition Mass Gainer

You can buy Crazy Nutrition Mass Gainer right from Crazy Nutrition’s website.

crazy nutrition mass gainer website

It comes in Chocolate or Vanilla flavors. 

There are 20 servings (80 scoops) per bag of Crazy Nutrition Mass Gainer. The regular price is $89.99 ($4.50/serving). But you can save a large portion of that by choosing the Subscribe & Save option, which brings the cost down to $62.99 ($3.15/serving)

They also have a 60-Day Money-Back Guarantee

Overall, this pricing is right within a normal range for mass gainers. And the subscription savings is one of the biggest out of any products we’ve seen.

Final Thoughts: Crazy Nutrition Mass Gainer Review

Crazy Nutrition Mass Gainer is a well-formulated mass gainer for people who want to bulk up and pack on muscle.

It contains clean sources of carbs, fats, and protein for energy, performance, recovery, and muscle gain. Plus, they use digestive enzymes and various herbs to minimize gas and bloating while enhancing nutrient absorption. 

The price is a bit high, but they also offer a great deal with the subscription option. And overall, we recommend it as one of the top mass gainers out there, whether you want to use it for bodybuilding, weight lifting, athletics, or simply getting bigger.

Overall Rating:
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Jack Cincotta, MS

Jack Cincotta is a certified holistic health coach through AFPA and a board-certified holistic health practitioner through AADP. He has written hundreds of articles on nutrition and supplementation. Jack has a M.S. degree in Psychology and is passionate about researching the science behind nutrition. He often uses research-backed supplementation protocols for many of his clients to optimize results.