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Optimum Nutrition Pro Gainer Overview

  • Provides a whopping 650 cal per serving
  • Available in five fantastic flavors
  • Contains 60 g of protein and 85 g of complex carbohydrates per serving
  • Includes a blend of six different types of protein
  • Contains minimal fats and sugars
  • Brought to you by one of the world’s leading bodybuilding supplement brands
  • Provides a broad spectrum of essential vitamins and minerals
  • Ranked #1 on our Best Mass Gainers List
Where to Buy ON Pro Gainer

Optimum Nutrition Pro Gainer Overview

Optimum Nutrition Pro Gainer is a weight gainer supplement designed to help you add a considerable amount of extra calories to your diet by introducing high-quality proteins and carbohydrates.

While many competing mass gainer supplements on the market bolster their caloric content with the use of low-quality sugars and fats, Optimum Nutrition Pro Gainer uses a fantastic blend of six different proteins, complex carbohydrates, and medium-chain triglycerides for unrivalled nutritional content.

For young guys who are training hard on a consistent basis it can be extremely difficult to keep making progress in the size and strength department, and a lot of the time regular whole food simply doesn’t cut it.

If this sounds like a familiar scenario to you then you should find Optimum Nutrition Pro Gainer to be a convenient and cost-effective way of adding quality calories to your diet without having to choke down endless amounts of food.

What’s in Pro Gainer?

Optimum Nutrition Pro Gainer contains the following ingredients:

  • Maltodextrin
  • Protein Blend, containing:
    • Whey Protein Isolate;
    • Whey Protein Concentrate;
    • Calcium Caseinate;
    • Egg Albumin;
    • Hydrolyzed Whey Peptides; and
    • Glutamine Peptides
  • Lipid Blend, containing:
    • Medium Chain Triglycerides; and
    • High Oleic Flower Oil
  • Partially Hydrogenated Guar Gum
  • Lecithin
  • Vitamin and Mineral Blend
  • Carbogen Enzyme Blend
  • Aminogen Enzyme Blend
  • Lactase
  • Sucralose
  • Acesulfame Potassium

optimum nutrition pro gainer nutritional label

How and When Do I Take It?

As per the manufacturer’s recommendations, you are to mix one heaping scoop of Optimum Nutrition Pro Gainer into 16 ounces of cold water and shake until thoroughly dissolved.

Realistically you can take it anytime you want, your body will get the nutrients regardless, but I’d recommend drinking a shake before breakfast or after an intense workout for best results.

To increase the caloric content of your shakes you may wish to consider adding other items such as peanut butter, and if you are using an electric blender to mix your shakes then you could even use fruit, nuts, and other bodybuilding supplements.

What are the Suggested Benefits?

The main benefit of using Optimum Nutrition Pro Gainer or any other kind of weight gainer shake is that it allows you to swallow hundreds of calories within a matter of seconds; something that would be nigh impossible with solid food.

In terms of what Optimum Nutrition Pro Gainer has to offer over similar mass gainer products, the defining feature is its fantastic protein blend which contains six different types of dairy and egg proteins.

These six proteins offer varying rates of digestion, so while hydrolyzed whey protein and peptides help to spike your blood amino acid levels very quickly, calcium caseinate provides more of a trickle effect to offer a sustained release of amino acids over the course of a few hours.

Another great addition to the ingredients list of Optimum Nutrition Pro Gainer is the vitamin and mineral blend, providing your body with a wide range of essential vitamins and minerals to further speed up the recovery process and give your body what it needs for growth and repair.

There are quite a few low-quality weight gainer supplements on the market that use impure proteins which can cause all kinds of digestive issues, but Optimum Nutrition Pro Gainer combines great protein sources with Carbogen and Aminogen enzyme blends.

These two blends of enzymes, in conjunction with lactase, help to ensure that you don’t experience any kind of gastrointestinal discomfort, while also increasing your body’s ability to absorb and utilize every gram of protein and carbohydrate.

Are There Any Precautions?

Consult your doctor or physician prior to using Optimum Nutrition Pro Gainer if you have any pre-existing medical conditions, are pregnant or breastfeeding, or if you are currently using prescription medication.

Optimum Nutrition Pro Gainer is generally not recommended for individuals under the age of 18.

Please note that these statements have been neither written nor reviewed by a doctor or medical authority of any kind.

Available Flavors and Serving Sizes

Optimum Nutrition Pro Gainer is available in the following flavors:

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

What’s more, Optimum Nutrition Pro Gainer is available in the following serving sizes:

  • 09 lbs
  • 1 lbs
  • 16 lbs


Optimum Pro Gainer is number one on the current best weight gainer supplements list with a high flavor rating of 7.5 out of 10, and an overall 9.3 out of 10 as well on where over 300 users reviewed this product from personal experience.

With 60 grams of protein per dose, 85 grams of carbohydrates and only 5 grams of sugar, this mass gainer supplement should help you pack on lean muscle through proper usage, healthy diet and training sessions.

Users rave about the effectiveness of Optimum Pro Complex for bulking up without the fat gained on some gainers, “Awesome for bulking, easy convenient way to get sufficient protein and calories.”  Reviewers also say they had no bloating or gas like on other such products.  Optimum Pro Complex Gainer is recommended for weight lifters and hard-gainers alike, with great results in a short time frame.


The average price for Optimum Pro Gainer is around $36 to $50 for 5.08 pounds. One user said that this is “a great product [for a] great price” and highly recommended the use of this product to anyone looking to gain lean mass.

I do recommend buying this product online specifically for finding the lowest prices available. Overall it’s not that bad of a price for such a good product. However, there are cheaper alternatives.

Is Pro Gainer Suitable As a Meal Replacement Product?


There are a lot of inferior weight gainers on the market but you can always rely on a reputable brand like Optimum Nutrition to be a leader in just about every area.

This product provides a balanced content of protein, carbohydrates, and fats in addition to a few grams of fiber.

It is not recommended that you use Optimum Nutrition Pro Gainer as your sole source of protein or as the foundation of your diet, but it will certainly suffice as a convenient replacement when you are either in a hurry or in need of a big calorie hit.

Is Pro Gainer Better Than a Normal Whey Protein Powder?

Better is always going to be a relative term when it comes to mass builder supplements like Optimum Nutrition Pro Gainer.

This product isn’t really suitable for use as a post-workout protein shake, and it is intended primarily to allow you to add extra calories to your diet throughout the day, either as a replacement for your existing meals or to be taken in between meals.

Optimum Nutrition Pro Gainer does offer some great value for money compared to a lot of similar products so it is well worth considering if you are in the market specifically for a mass gainer protein supplement.


Optimum Nutrition Pro Gainer is definitely one of the better weight gainer products on the market, and it should come as no surprise for any of you who have ever used Optimum Nutrition supplements before.

With its easy digestion and five different flavors to choose from you should find Optimum Nutrition Pro Gainer to be more than up to the task of bolstering your daily caloric intake in a convenient and cost-effective way.

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