Welcome to this unbiased Optimum Nutrition Serious Mass review. Optimum Nutrition or “ON” is one of the most popular muscle building supplements brand in the sports nutrition market today.

ON was first established in 1986 and has grown to be a well respected supplement leader. It is now a fully owned subsidiary outright by Glanbia, a Kilkenny, Ireland-based multinational company. Optimum Nutrition offers a full range of supplement products including a multivitamin, diet, recovery, specialty and multiple protein powders and has a well-earned reputation for producing quality products.

Let’s now get discuss the particulars offered by Optimum Nutrition with their Serious Mass whey protein powder supplement.

Optimum Nutrition Serious Mass Product Features

Let’s first talk about quality. All Optimum Nutrition products are manufactured in cGMP-compliant (current Good Manufacturing Practices) facilities, which certifies quality of ingredients, purity of ingredients, rigorous manufacturing practices, and cleanliness of facilities.

This is a real standard of achievement as most supplement companies don’t have such rigid standards. As a comparison, pharmaceutical drugs are produced in cGMP-compliant facilities. Moreover, Optimum Nutrition also has NSF Certified for Sport registered GMP certification. Again, that is highly desirable and an indicator of high product quality. These requirements are consistent with the published GMP regulation for dietary supplements as defined in 21 CFR § 111, which was published by the FDA in June 2007.

Continuing, the Optimum Nutrition Serious Mass product comes in 3 pound, 6 pound, 12 pound, and 18 pound options. The flavors this particular product comes in are strawberry, chocolate, vanilla and banana.

Regarding the nutrition, it’s hefty. With two scoops, the recommended amount (334 grams), you get a whopping 1,250 calories. If you took just one scoop, though, it would be 625 calories. From my experience, this is enough, but you are free to do what you feel is best.

The Optimum Nutrition Serious Mass product also gives a full complement of vitamins and minerals totaling 25. It is also enhanced with creatine and L-glutamine.

Side Effects & Health Benefits of Optimum Nutrition Serious Mass

The side effects of taking this product, if you follow the recommended guidelines, is a dramatic spike in daily calories. When combined with a high-calorie diet, it will cause weight gain. That said, that’s the point of this product – it is designed for those who want to gain mass and weight.

A side effect common to most muscle building supplements, especially protein powders, is flatulence. It is recommended that it be taken judiciously. Flatulence for some, though, is unavoidable. Optimum Nutrition protein powder seems to be better than most in resolving that problem.

Its health benefits are clear – you will gain muscle when combined with weight training exercise. The product will help keep a positive nitrogen balance, which is critical to muscle synthesis, according to researchers.

How Much Should You Expect to Pay?

While there are many ecommerce stores online and offline retailers, the best pricing I’ve been able to find is at Amazon.com. But you are free to choose. At Amazon, the price range you’ll find is $27.74 with free shipping to $39.49, shipping price added. You can see the pricing here.

Here is the 3-pound option.
Here is the 12-pound option.
Here is the 18-poud option.

Does Optimum Nutrition Serious Mass Have a Guarantee?

Optimum Nutrition does offer a good guarantee, but like most supplement manufacturers, they will accede to the guarantee of the retailer or ecommerce store that sold it to you. I recommend Amazon not only for their great prices but for their customer satisfaction as well.

Amazon is the largest online retailer in the world having reached $61.09 billion gross sales last year and $14.96 billion in gross income (see here). You can see Amazon’s guarantee here.

Consumer Reviews & Testimonials

On Amazon.com, there are over 541 reviews from just one page for this product with an average of 4.1 out of a possible 5.0. Here are a few as a sampling. You can read more reviews here.

Sized Up, Big Time
By Preston Vrinios on July 15, 2013
Flavor Name: Chocolate
Size Name: 12-Pounds

8 weeks back I set a goal to put on 15 pounds of lean muscle (building from 190 to 205). I just passed the deadline two days ago and am now sitting 2 lbs above my goal at 207 lbs. And I had to change everything. From my diet to training to supplementing. Serious Mass was a HUGE help for the added calories and protein and stacked perfectly with my cycle of CRUSCH: Ultimate Tri-Phase Creatine. The gains in strength alone were worth it. And the size is real size, no garbage water weight.

I think at this point I’m going to cap it off at 207 because anything more is just overkill, especially when it comes to maintenance (eat, eat, workout, eat, work, eat, eat, sleep, repeat…). But it definitely feels awesome to blow right past a goal. ON rocks. 5 big stars.

Great
By Stephon on July 6, 2013
Flavor Name: Chocolate
Size Name: 12-Pounds Amazon Verified Purchase

I have gained 8 pounds so far and it’s not even finished yet, it is a great product, I’m definitely going to buy it again.

Stuff Works
By Eli Peterson on July 6, 2013
Flavor Name: Chocolate
Size Name: 12-Pounds

 I almost never took the complete recommended amount and still gained 10-12 pounds of mass after the first month great deal, great product.

Where Can I Buy It?

I recommend buying it from Amazon.com. It has the best prices and a great guarantee.

You can buy it here or by clicking on the graphic to the left, but you are free to choose. I hope this Optimum Nutrition Serious Mass review has been useful to you.

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