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BSN True Mass vs Optimum Nutrition Serious Mass

Just like their standard protein counterpart, the mass gainer market is flooded with options but two of the biggest names always rise to the surface. If you're looking for a high quality mass gainer, chances are that you've come across BSN's True Mass and Optimum Nutrition's Serious Mass. Which one is better? Let's review the pros and cons to help you decide which one should go in your shopping cart.


BSN True Mass


Where can I buy it?

  • You can buy it here



  • 50 grams of protein per serving from a complex protein blend
  • 630 calories from the powder alone
  • 6 grams of fiber
  • Uses medium chain triglycerides



  • High in cholesterol (this may or may not be problematic depending on your dietary needs)
  • Use of vitamin and mineral complex (explained below)


True Mass from BSN is a solid weight gainer and one of the better ones on the market. It uses a complex protein blend ranging from whey concentrate to peptides to egg albumin. This variety of protein is important to ensure long term amino acid release. The majority of the calories are coming from protein and MCT fats.


Using medium chain triglycerides gives the product a fat content of 17 grams per serving, only 5 grams are coming from saturated fat. Fat is a very important macronutrient, especially if you're trying to gain weight, because it's so calorically dense at 9 calories per gram. Compare that to 4 calories per gram with protein and carbohydrates.


One thing to note is the high cholesterol content at 120 mg. If your trying to gain weight or support muscle mass, there's a good chance you won't have to worry much about this. If you have prior issues with cholesterol and blood pressure, talk with your doctor first.


The one thing that isn't necessary is the vitamin and mineral complex. If you're trying to gain weight or more muscle, you should already be eating a well-balanced, high calorie diet, meaning you're already getting all of these vitamins and minerals.


Optimum Nutrition Serious Mass


Where can I buy it?

  • You can buy it here



  • 50 grams of protein per serving
  • 1,250 calories from the powder alone
  • Uses medium chain triglycerides



  • High in simple sugar


Optimum Nutrition is an industry giant and they prove it again with Serious Mass. This mass gainer hits hard with 1,250 calories per serving. You'll also be getting 50 grams of protein per serving with low fat content at only 4 grams.


Like True Mass, this mass gainer offers you a protein blend; however, the former gives you a more complex formula. Serious Mass only provides you with whey, casein, egg albumin, and sweet dairy whey.


Serious Mass does include MCT, which are an easily digestible fat source and one that is beneficial for your health. Where Serious Mass may fall short is its use of maltodextrin and its 252 carbohydrate load per serving. Complex carbohydrates at that amount would be ideal for safe muscle building and weight gain. The problem here is the maltodextrin. While classified as a complex carb, it's extremely high on the glycemic index, making it a potentially troublesome ingredient. The vast majority of the 1,250 calories are coming from these high glycemic carbs with the rest coming from protein.




Both of these are great products but it really depends on WHEN you use them. Despite being lower in calories, True Mass is the better 'any time' weight gainer. Serious Mass trumps True Mass as a post-workout meal because that's when your body requires a fast acting carbohydrate source. Case in point: Go with True Mass if you just want weight gain. If muscle is on your mind, use Serious Mass as a post-workout supplement.

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