10 Best Mass Gainers (Review) In 2021

This mass gainer from Optimum Nutrition is one of the most effective ways of maximizing your weight gain potential and supporting your lean muscle growth. You get 1,250 calories with each service, which is equivalent to a (very) large meal. Of course, those calories aren’t just any old calories. There’s 50g of protein and 252g of carbohydrates in every serving. On top of that, you get 25 vitamins and minerals as well as creatine and glutamine, to provide your body with all of the fuel it needs to operate perfectly.

In this 12lb pack, you get 16 servings, which should keep you going for a couple of weeks. There is a smaller 7lb tub available, but it’s not as good value. Plus, this mass gainer comes in 6 different flavors. If your sole aim is to put on weight, this is the best mass gainer supplement to always have in your gym bag. 

Optimum Nutrition Pro Gainer is designed to help you recover after a workout and increase your muscle mass. The carefully selected blend of proteins, carbohydrates, fats, vitamins, and minerals is exactly what your body needs after a heavy workout. Like the last Optimum Nutrition mass gainer shake, this product will help you put on weight, but it has higher levels of protein, which improves recovery.

On the tub, it says that you get 650 calories per serving. However, a lot of customers have found that to be inaccurate. You might have to put more than 1 heaped measurement in to get the full amount (about another ⅓ or ½ serving). If you have scales, you can measure the serving out accurately. Having said that, this product does have a fantastic reputation for the way it breaks down in water and the way it tastes. This is super important because the best mass gainer is the one you will use every day. If you hate it, you’re not gonna use it.

This mass gainer from MuscleTech is designed specifically for weightlifters. It has the perfect combination of ingredients for those lifting gains and they’ve got the studies to back it up. In an 8-week study of weightlifters (where 2,000 calories of MuscleTech Mass Gain were added to a protein-rich diet already consisting of 2,300 calories), the group that took this supplement gained over 5x as much mass as the control group. That’s proof that this is a quick and effective way of increasing your mass as a weightlifter.

Each serving has 1010 calories, 80g of protein, and 156g of carbs, when it’s mixed with 2 cups of skim milk. Plus, it’s not just for post workouts – you can drink this shake in the morning or in-between meals as well, which makes it a more versatile option for everyday weight gaining. Some customers have complained that it’s too thick, but the taste more than makes up for it. Perfect to help you gain and maintain that muscle mass.

If you’re looking for a mass gainer that’s all about the calories, you should try the Dymatize Super Mass Gainer Protein Powder. It has 1310 calories per serving, which makes it the most calorific gainer on our list so far. But don’t worry, they haven’t just packed it full of bad stuff to make up the numbers. It’s full of high-quality ingredients and nutrients to support that weight gain.

It also has 10.7g of BCAAs (branched-chain amino acids), which increase protein synthesis (the building of muscle tissue). However, these ingredients should come with a warning because they can seriously lower your mood. If you have a history of depression, you should steer clear of products that contain BCAAs. If your mood is pretty solid, this mass gainer should work wonders for you.

The BSN TRUE-MASS Weight Gainer is one of the best-reviewed mass-gainers on Amazon. Over 950 customer reviews, it has managed to maintain a 4.5-star rating, which is seriously impressive for a product like this. The reason? It doesn’t have any surprising ingredients and they don’t make any outlandish claims about the results you can expect. Instead, they just give you the facts and figures. Each serving has 700 calories, which might seem on the low side but it’s the quality of those calories that counts. For example, the 46-50g of protein in every serving is provided by 7 different ingredients like casein and whey. And there’s a mixture of slow, medium and fast digesting proteins. The strength of this mass gainer lies in its 2:1 carbohydrate to protein formula. This is designed for athletes who need to increase their calorie intake. Are you also looking for the perfect protein shaker to prepare your healthy shakes? Be sure to check out our selection of the best ones on the market.

Body Fortress Super Advanced Mass Gainer is a cheap alternative if you don’t need huge containers. It’s a good way to try mass gainers out and see if you like them. The 1.8kg tub only has about 8 servings in (based on 3 scoops per serving), so it will probably only last you a week if you’re working out hard. We’ve also found that the information on the front of the pack is pretty misleading – you need 6 scoops to get the 1,000 calories and 40g of protein, which would mean only about 4 servings in the pack. As we said, it’s a cheap way of trying this type of product out.

On the plus side, it has 8g of BCAAs and 2.5g of betaine anhydrous, which helps support lean mass and body composition. There’s also a lot of anecdotal evidence in the Amazon review section, where customers have shown their results.

This next product is slightly different from the other mass gainers on this list. Instead of mixing protein, carbs, and fat into one product, NOW Sports Nutrition focuses on carbohydrates. It is pure maltodextrin, which is a complex carbohydrate derived from GMO corn. It contains glucose polymers which are easy for the body to digest and assimilate, making this the perfect post-workout supplement. It also doesn’t have any of the fancy flavorings that you see in most products. Instead, you add a scoop of this to water or juice and add 250 calories to your drink. You can even put your flavorings in if you find something you like. It’s often added to a protein shake to create your mass gaining product. The best thing about this product though is the value – you get about 57 servings in the tub and costs just over $20. If you want to get more bang for your buck, this is the tub for you.

The Real Gains Weight Gainer is used by bodybuilders and weightlifters around the world. It has a reputation as one of the ‘best bang for your buck’ mass gainers on the market. It comes in a 4.8kg bag, which should provide you with over 30 servings. That means if you are just using it for post-workout once a day, a bag should last you about a month. Each serving contains about 600 calories, 53g of protein, and 84g of carbohydrates. The best thing about this mass gainer, in particular, is that it provides both fast and slow-digesting carbohydrates. That means your muscles are fed after a workout and can continue to grow. It also has healthy fats from MCTs and EFA, which makes it very nutrient-dense compared to other mass gainers. A lot of Amazon customers have mentioned how good it tastes as well, and there’s a total of 7 flavors to choose from, so you should find one that you enjoy drinking.

A lot of weightlifters swear by CytoSport Cyto Gainer. It’s easy to get carried away and pick the weight gainer with the most calories, protein, carbs, and fat. But it’s not always the best course of action. This mass gainer contains 550 calories per serving, so it’s nowhere near the most calorific shake on here. But it makes up for it with a mixture of other key ingredients. For example, it contains whey peptides that increase protein synthesis. The complex carbohydrates are 96.5% sugar-free. And, it contains no simple sugars, fructose, or sucrose, so it should help you build muscle instead of increasing body fat. All of this makes this one of the most efficient weight gaining products on the market. Our only slight complaint is that the stats on the front of the tub are quite misleading because you need to take 4 scoops instead of 2 to get the 54g of protein. It also makes a perfect fitness gift for weightlifters and fitness enthusiasts in your life.

The biggest selling point of Less Naked Mass is that it only contains 5 ingredients – Naked whey, Naked casein, organic maltodextrin, organic coconut sugar, and organic raw cacao. That means customers know exactly what they are eating, without having to read hundreds of complicated ingredients. Even with that cut-back ingredient list, you get 50g of protein, 251g of carbohydrates, and 11.6g of BCAAs. And, in every serving, there are an amazing 1360 calories. It’s one of the most stacked mass gainers on this list. The only problem is how much sugar is in each serving – about 50g. That does mean that it tastes amazing without the need for artificial flavoring but it can be bad for your health if you’re not keeping an eye on things.