ON Pro Gainer Review 2020 (Pack on Some Serious Lean Muscle)

Gaining muscle mass and strength will require consistent heavy training plus good nutrition to keep you in top form, that’s why I came up with this ON Pro Gainer review.

Everyone’s got different needs and bodies. If you find it easy to pack on muscle, others may struggle with it. However, using a high-protein formula like ON Pro Gainer can help deliver the nutrients you need for some significant muscle gain. 

Each serving of this powerful supplement offers an adequate amount of protein, carbs, and a blend of vitamins and minerals. Just like having a balanced diet, this formula will help you build the amount you need to gain lean muscle and increase your strength.

Try incorporating the ON Pro Gainer into your post-workout recovery drink or consume it as a high-protein meal between your other meals. 

Coming from one of the world’s leading manufacturers of nutritional supplements, this formula contains an impressive 650 calories per serving. It also comes with 60 g of protein and 85 g of complex carbs for your energy levels.

Its protein content has a superior blend of a whopping six protein types. Plus, you can support your overall wellness with the ON Pro Gainer’s wide range of vitamins and minerals. 


ON Pro Gainer Features

Delivering high-quality protein and complex carbs to your body, Optimum Nutrition has formulated the Pro Gainer to increase nutritional content and stimulate muscle growth.

Consuming a whopping amount of regular whole food may not really cut it. If you’re training hard consistently and keeping a close eye on your progress, that’s great.

But if you want to make some more progress in terms of gains, you may find this muscle building supplement a valuable addition to your daily routine. It’s simply a rewarding move to add these quality calories to your diet without having to wolf down excessive amounts of food. 

This ON Pro Gainer review looks into some of the many features of this powerful formula that will boost your fitness journey towards gaining lean muscle

High-quality protein

With 60 g of high-quality protein blend, using the ON Pro Gainer is set to help you crush your muscle gain goals.

Its protein blend includes whey protein isolate, hydrolyzed whey peptides, and glutamine peptides.

They’re just some of the most researched components of bodybuilding supplements these days. We’ve seen how nourishing whey is, thanks to its high nutritional value and its multiple muscle-building benefits. 

You’re spending some time in the gym and putting in all the work. This certainly needs a follow-up in the form of a protein supplement.

If you want to see results, you have to incorporate more protein into your daily routine, like the premium blend this protein powder provides.

Aside from building lean muscle, there are just too many benefits associated with whey protein drinks.

It’s a satisfying nutrient because it makes you feel full longer. This then helps you resist the temptation of consuming extra calories you may have taken in otherwise. 

With whey protein isolate being the purest protein form, your body is simply absorbing one of the most superior nutrients out there.

With this supplement, you’re preventing muscle loss and repairing your muscle tissues, thanks to the essential amino acids that come with whey protein isolate.

two tubs of ON Pro Gainer

Carbohydrates to recharge energy levels 

The ON Pro Gainer comes with 85 g of carbs that will give you the energy for powering through your workouts.

As a result, you’ll have a greater chance of building stronger and bigger muscles.

If you’re looking to gain lean muscle, it’s not just protein you’ll need. You should also have enough carbohydrates in your body, and it shouldn’t be surprising at all.

Weightlifters, bodybuilders, and athletes know that carbs, particularly the good type of carbs, are essential to building strong muscles.

If your goal is muscle growth, you shouldn’t hold back on these carbs, specifically complex carbs

These complex carbs from ON Pro Gainer are a reliable, steady source of energy.

They may not immediately spike your energy levels but they’re certainly sustainable. Because they’re slow to digest, these carbs slowly give your body continuous energy for a longer period.

Consuming complex carbs in your regular diet has also been found to prevent muscle loss. Also, they help your muscles recover from the strains and fatigue of exercise.

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Extensive range of vitamins and minerals

Gaining lean muscle and maintaining it won’t only take months but it will take you years to crush these goals.

For this reason, taking ON Pro Gainer with its high content of vitamins and minerals will certainly give you the proper nutrition you need in your fitness journey. 

Let’s say you’re doing a curl for your biceps or a deadlift for your quads. You’re engaged in physical activity that can cause micro-tears in your muscles’ fibers. When you rest, this is the time that your body repairs and strengthens your muscles.

For this reason, it comes with essential vitamins and minerals so you can see the difference from your upper body down to your lower body.

Unrivaled fuel for the body

To give your body the nutrients it needs, including fuel to withstand gruelling workouts, you can maximize your health and boost your overall strength.

It’s my goal to stay healthy physically and in other areas of my life. 

Male bodybuilding holding a tub of ON Pro Gainer

In using a muscle gain supplement like this one, I’ve been able to get the most out of my workouts.

In addition, I’ve gained many health benefits from it, thanks to a superior combination of nutrients. After working out, you can go for an ON Pro Gainer drink to get a kick out of a satisfying AND nutritious recovery. 

Let’s Look At The Ingredients 

This ON Pro Gainer review looks further into the ingredients of this superior blend that will keep you going so you can get big and pack on some serious muscle. 

ON Pro Gainer supplement facts and ingredients

Per serving, you get 60 g of protein, 85 g of carbohydrates, and 22 essential vitamins and minerals. This impressive supplement will help you gain lean muscle as you put up consistently with training sessions

Protein blend

Its protein blend includes:

  • Whey protein isolate
  • Whey protein concentrate
  • Hydrolyzed whey peptides
  • Glutamine peptides
  • Calcium caseinate
  • Egg albumen

As I’ve mentioned, the whey isolate is the cleanest form of pure protein that’s already been stripped off of unnecessary macronutrients. As a result, this provides a strong boost of protein.

The whey concentrate helps sustain a high protein level but it’s less pricey than the isolate. 

The hydrolyzed whey peptides are easily digested by the body especially when taken in liquid form, so your muscles can recover fast. Say no to bloating and any other heavy feeling after exercise, too. 

Its calcium caseinate is extracted from milk and ensures your body gets a steady stream of amino acids in a few hours.

The glutamine peptides enhance the transport of electrolytes in your body. These also make sure that the amino acids are effectively absorbed, and that your muscles recover fast.  

Finally, the egg albumen comes from powdered egg whites and also offers high protein quality.

Carbohydrate content

With the high carbohydrate content, I recommend taking it after your workout or early on in the morning. You can make sure your body’s using the carbs to replenish energy levels. 

Carbs are crucial for fueling your muscles. They’re not as appalling as you think they are when it comes to being in good shape. 

Carbs are stored in your muscle to give energy to your exercises. The good-quality carbs found in ON Pro Gainer are one of the best strength-training components you can have.

Essential vitamins and minerals

Selection of exotic fruit

Another whopping addition is its phenomenal blend of over 20 vitamins and minerals.

This offers your body a great opportunity to improve its recovery process, thanks to its supply of what’s needed for growth and repair.

Digestive enzymes

Optimum Nutrition also added digestive enzyme blends like Carbogen and Aminogen.

These will help improve the way your body absorbs and digests protein. Also, these digestive enzymes make sure that the amino acids from the supplement sufficiently reaches your muscles. 

Other ingredients

It also contains sweets like cocoa, sucralose, and acesulfame potassium. Its soy lecithin content improves the drink’s mixability.

Let’s Look At The Flavors

Glass of ON pro gainer

Satisfy your taste buds whiling gaining lean muscle with any of the following ON Pro Gainer flavors:

  • Banana Cream Pie
  • Cookies & Cream
  • Double Chocolate
  • Strawberry Cream
  • Vanilla Custard

What About The Price

This muscle gaining supplement is available for the following prices, depending on size.

A 2.3 kg tub costs $55.99 while a 4.1 kg tub costs $85.99. 

Its largest size, the 4.6kg tub, costs $100.99.

How to Take ON Pro Gainer

Based on Optimum Nutrition’s recommendations, it’s best if you mix one scoop of with 16 oz. of cold water. Make sure you shake it well until the powder is completely dissolved.

You can consume this drink almost anytime you prefer as your body will still absorb the nutrients. However, I would recommend you taking this muscle gain supplement before having breakfast or after an intense training session.

It’s primarily formulated so you can have additional calories to your daily diet. You can even have it as a replacement for a particular meal or consume it in between your meals. 

Mix your drink with peanut butter, nuts, fruits, and other bodybuilding supplements. This way, you can add more to its calorie content and contribute more to your lean muscle gains. 

ON Pro Gainer Pros and Cons

Ripped male physique athlete.


Comes with high-quality proteins that your body can easily digest and absorb

Each serving contains 60 g of premium protein from various clean, pure sources. 

Comes with complex carbohydrates for increased energy levels 

For every serving, you get 85 g of carbohydrates plus 5 g of fiber. The good kind of carbs, the complex carbs, are necessary for you to power through your tough exercises. You have a greater chance of crushing your muscle gain goals, including growth, strength, and repair.

Also contains medium-chain triglycerides (MCTs)

This doesn’t only boost your energy but increases your endurance as well.

Offers an extensive range of essential vitamins and minerals

For a fast recovery process plus your overall wellness, multiple vitamins and minerals have also been added to the mix. 

Formulated with enzyme blends

While the superior protein blend of ON Pro Gainer is not very likely to cause gastrointestinal discomforts after consumption, the presence of Carbogen and Aminogen can help reduce any possible digestive issues.

Easy to digest, different delicious flavors to choose from

The powder comes in various flavors to suit your taste, plus it’s really easy to mix. Once it’s thoroughly done, the taste is lush and flavorsome as that of many other Optimum Nutrition supplements. 


  • Some users have reported concerns over the protein blend and its effectiveness, preferring a purer mix. 

My Final Thought

Looking into its multiple benefits, this ON Pro Gainer review concludes that this muscle gain supplement is certainly one of the more superior products out on the market.

If you’ve already tried other supplements from Optimum Nutrition, it’s not surprising this one is a popular choice for many. 

All in all, I recommend the ON Pro Gainer if you’re into increasing your daily calorie intake and gaining lean muscle.

With this powerful supplement, you can attain your fitness goals in the most convenient way. Of course, besides drinking your supplements, you have to be up to the task when it comes to consistent training and proper nutrition.

The price for ON Pro Gainer may seem a bit higher, but it’s really an incredible value for your money. For a high content in terms of protein, carbs, vitamins, and minerals, I think the price is simply reasonable.

It’s your go-to formula for gaining lean muscle for the reason that it comes with many muscle-building and repair nutrients.

The five flavors may not be the widest variety, but it’s enough to keep most athletes satisfied.

Aside from gaining sufficient calories and protein as well as adding lean muscle, the ON Pro Gainer has also gained recognition worldwide for other factors. It doesn’t cause gas and bloating, has very low cholesterol content, and tastes incredibly delicious. 

I highly recommend the ON Pro Gainer for weight lifters, bodybuilders, and other athletes and fitness enthusiasts looking to make some hard muscle gains. If you’re in need of some serious calorie hit, this is the ultimate way to go. 

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ON Pro Gainer Review

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