Pro Performance® Mass XXX™


Serious athletes are aware that while trying to achieve muscle mass and strength gains, proper sports nutrition is a must. While striving for such gains, it is essential that you get enough calories, including a balance of quality carbohydrates, protein and fat. Falling short on any of these nutrients can obstruct your performance goals. Pro Performance® Mass XXX™ is the right nutrition drink to help you meet your nutritional needs and keep you fueled while working towards gaining muscle mass and strength.

This special blend of carbohydrates includes 83% complex carbohydrates (maltodextrin and fiber) and only 17% sugar. Each serving of this highly specialized sports formula boasts 66 grams of quality protein and 146 grams of carbohydrates when mixed with 2% milk. It also features a blend of essential fatty acids including some healthy unsaturated fats, medium chain triglycerides (MCTs) which are quickly absorbed for energy, and no trans fats. This combination of protein carbs and fat help to provide the extra-calories that you need to put on the added pounds you want.

Mass XXX supplies key amino acids such as arginine and the Branched Chain Amino Acids (BCAA); isoleucine, leucine and valine. Amino Acids are needed to build the various proteins used in the growth, repair and maintenance of body tissues such as skin, bones and muscle. BCAA help fuel your skeletal muscles, preserve muscle glycogen stores and help to reduce the amount of protein breakdown. Adding BCAA to your diet can be anti-catabolic and have a protein-sparing effect. Arginine is an essential is an essential precursor of nitric oxide and is involved in the body's natural formation of creatine.

In addition, Mass XXX contains a special blend of carbohydrates, the body's primary source of energy. Carbohydrates are an important fuel during intense or high intensity exercise. Carbohydrates also replenish energy stores after high intensity exercise. Furthermore, the combination of dietary protein with carbohydrates following resistance exercise supports muscle protein synthesis
Product: Pro Performance® Mass XXX™
Brand: GNC (More Products)
Size: 6 lbs
Dosage: one scoop (195g), 1-2x per day
Retail: $39.99
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53 Customer Reviews


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by Anonymous

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Mass XXX
by Steve

I started using Mass XXX around 3 weeks ago. I am 5'6 and have weighed 125 - 130lbs for the last 15yrs. I have not been able to put on weight. I have a very fast metabolism. I started working out 2 weeks ago and have put on 10lbs in 3 weeks! Unbelievable! I put 3 scoops in 350ml of water and take this twice a day. If I workout I make sure that I drink one right after the workout. Seems to be working great for me. My goal is 150-160lbs by the summer. At this rate I will have no problem hitting that target.
I highly recommend this product!


good deal
by Quan

this is a great product that gives you huge affects and supplies you with a bigger and better body. please try it.


How to gain weight
by Tim

I've been using this for a few weeks now and it helps me increase my strength but i have not gained any weight. I would like to gain at least 15 pounds during summer so is there any way that is possible?


The New Amp Mass XXX
by Alex

to make Vanilla taste unbeatable I use whole milk (whether you use whole milk or not is up to you) and more importantly I like to add Golden Grahams cereal. Put it all in a blender for about 15 seconds and your Golden! haha



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7 Customer Opinions


ways to make it taste better
by nate

I've been taking this product for a while and its a little gross to pound back. Does anyone mix it with other things to make it taste better?


Mass XXX
by Yuvaraaj

I have been using Optimum Nutrition Whey protein Gold standard for the past 2 months and i wanted to go for a protein with some muscle mass. I went to the GNC store near by and they suggested the Masss XXX.
Iam around 176 cms and 72 kgs approximately. I never wanted to gain more weight rather i wanted to reduce by fat content in the body and grow more muscles ( gain lean muscle mass). i am using Mass XXX for the past 4 days and iam feeling more sleepy after an hour i use it. First day i took 2 scoops in the morning and i couldnt work , i felt damn sleepy. From second day iam taking 2 1/2 scoops after workout in the evening. I can feel the heat coming from the inside of my body and iam sleeping for more than 8 hourse. I have never felt this behaviour with ON whey protein. is this Normal? Will this product help me in reducing fat and build more muscles?



good stuff
by jeff

I use the cookies and cream flavor. It tastes pretty good and I gained 3 pounds in one week. If your trying to gain mass, this is definitely for you.



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