top mass gainers for skinny guys

Have you ever felt like it is a struggle to gain extra muscle mass?  Maybe you have tried some supplements but feel thin and don’t have the results to show it.

If you are a hardgainer, having a hard time putting on weight despite your best efforts, a mass gainer or weight gainer supplement might help you. The best weight gainers for skinny guys are supplements, usually in powder form, that you add to your diet. They’re loaded with calories and made primarily of good nutrients that you need to grow!

The market is saturated with options—which is great—but can lead to confusion and frustration as you compare products while you shop. To help you in your efforts, here are reviews of some of the best products and information about mass gainer supplements in general.

Top 6 Mass Gainers For Skinny Guys

  Weight Gainer Review Summary

Crazy Bulk D-BalClick For D-Bal PriceA very potent booster for gains. Offers impressive results quickly.

ON Serious MassClick For Serious Mass PriceA great mass gainer which tastes good too.

BSN True MassClick For True Mass PriceAnother great mass building supplement.

Universal Real GainsClick For Real Gains PriceFrom a well-respected brand in the bodybuilding & powerlifting. community.

Naked MassClick For Naked Mass PriceA protein-heavy weight gain supplement.

Muscle Milk GainerClick For Muscle Milk PriceA popular brand. Servings are smaller than other mass gainers.

Here are the top 5 weight gainers for skinny guys:

#1 – Crazy Bulk D-BalCrazy Bulk D-Bal

We know, this isn’t a protein powder or weight gainer supplement in the traditional sense. But the product creates such great results (especially for hardgainers) that it NEEDS to be #1 on our list.

These supplements are designed to enhance your body’s ability to build muscle and burn fat, kind of like steroids except these are completely legal and don’t have any of the side effects that you can get from steroids.

The D-Bal supplement is great for those who have been struggling to pack on muscle mass. If you can afford it, their bulking stack is the way to go. But if not, D-Bal is a great alternative. We just tested their new formula and the results are impressive.

Obviously, to get the best results with this, you will need to have a good diet and exercise routine. So if you combine Crazy Bulk supplements with one of the mass gainers on this list then you be getting some great results. See our Crazy Bulks reviews.

  • Great results
  • Easy to take
  • Improve overall mood
  • No side effects
  • Expensive (unless there is a sale on)
  • Can be confusing to decide which Crazy Bulk supplement to get

Click For D-Bal Price

#2 – Optimum Nutrition Serious Mass Weight GainerSerious Mass Weight Gainer

Optimum Nutrition is the best mass gainer for skinny guys on our list! This mass gainer powder not only packs a punch with 50 grams of protein per serving but also boasts 1,250 calories, 252 grams of carbs, and 25 different vitamins and minerals along with creatine and glutamine in every two-scoop serving. If you have an active metabolism, a weak appetite, or simply don’t have the time to consume enough calories during the course of your day, this weight gainer can help you bulk up.

Optimum Nutrition Serious Mass can be added to smoothies to boost nutrition and calories without sacrificing flavor by using an electric blender to mix it into the other ingredients (mix two heaping scoops of powder with about 24 ounces of cold water or milk then blend it with other ingredients). Flavors include chocolate peanut butter, strawberry, vanilla and banana.

Use it between meals to replace unhealthy snacks or use it after a strenuous workout to feed your muscles. You can even drink this before going to bed. If you’re just starting out, it’s recommended to start with a half of a serving before increasing the serving gradually over time.

  • Top weight gainer and highly effective
  • The product tastes comparatively good with multiple flavor options
  • Good value for money
  • Doesn’t make you feel bloated
  • Doesn’t come with a scoop
  • Has a thick consistency
  • Can cause elevated liver enzymes

Click For Optimum Nutrition Price

#3 – BSN TRUE-MASS Weight GainerBSN True Mass

BSN True Mass contains over 1,200 calories per serving, this weight gainer supplement provides plenty of additional calories for those looking to bulk up. More so, the high protein formula of  50 grams per serving will help with muscle growth and recovery. Along with the protein, there are also 215 grams of carbs (derived mainly from rolled oats) as well as branched-chain amino acids for additional nutrients making it a great addition to your healthy diet and workout routine. With 19g of sugar per serving, this tastes good!

You can use True-Mass as a meal replacement, as a post-workout supplement, or even before bedtime. Besides aiding in weight gain, this gainer can also help you recover from strenuous workouts by feeding your muscles with essential nutrients. Simply mix two scoops of the powder with about 16 ounces of cold liquid and drink one serving each day (depending on your calorie/protein requirements).

The True-Mass uses quite a few high quality protein sources. These are egg white albumin, calcium casienate, milk protein isolate, whey protein isolate, micellar casein, hydrolyxed whey protein and whey protein concentrate. This makes it the best protein powder for skinny guys.

  • Better taste than other brands
  • Effective mass gain recorded
  • Range of protein sources including egg whites
  • Can be harsh on some stomachs
  • Can be grainy if not shaken right before drinking
  • Larger versions seem to be less useful

Click For BSN True Mass Price

#4 – Real Gains Weight GainerReal Gains

This is a great weight gainer supplement for athletes looking to make qualifying weight for specific divisions or for those looking to put on weight during their off-season. It can be used as a meal replacement or as a bedtime supplement. The formula is quite potent and some might find that half of a serving twice a day might be better than a full serving taken at once. Simply mix your desired serving with 12 to 16 ounces of water (or any liquid you prefer) using a blender and drink it.

Each serving of Real Gains is over 600 calories and made from digestible fiber and inulin. They have rapid and sustained release carbohydrates and proteins to fuel your body like other powders but use MCTs and EFAs as their healthy fat sources in order to provide you with additional beneficial nutrients.

  • Tasty flavor options
  • Easy to mix on-the-go
  • Effective for weight gain
  • Comparatively affordable
  • Doesn’t work without weight training efforts
  • Caused diarrhea in some people

Click For Real Gains Price

#5 – NAKED MASS – Natural Weight Gainer Protein PowderNaked Mass

Another popular product, Naked Mass is considered to be more of a protein powder than a weight gainer despite its effectiveness in helping you gain weight. It is free of artificial flavors, sweeteners, and colors while also being GMO-free, growth hormone-free, and gluten-free making it a healthier option for those looking to keep to dietary restrictions. The powder is simply made of whey, casein, and maltodextrin derived from organic, gluten-free tapioca to provide you with a clean source of complex carbohydrates and multi-phase proteins—both important in gaining and maintaining lean body mass.

This product contains 1,250 calories per serving made of 50 grams of whey protein, 252 grams of carbohydrates, 5 grams of sugar, and 11.5 grams of branched-chain amino acids making it a well-rounded formula that will fuel your body effectively while helping you gain weight. Unlike other gainer supplements, this is unflavored so you can add it to recipes like smoothies and even desserts.

  • Pure ingredients used in the formula
  • Versatile product available with or without flavor
  • Helped people put on significant weight
  • Flavors don’t taste very good
  • Too much sugar for some
  • Didn’t work as expected for some

Click For Naked Msss Price

#6 – Muscle Milk Gainer Protein PowderMuscle Milk

One of the most popular options on the market, Muscle Milk Gainer is made for people who are looking to put on pounds, gain muscle, and fuel their workouts. It features 650 calories per four scoops (the recommended serving size) with 32 grams of protein and 3 grams of leucine (from milk proteins).

This is a versatile product that can be used pre- or post-workout or as a snack or meal replacement. To get the most out of this, mix four scoops of the powder into no more than 16 ounces of water for a shake. You can also add the powder to smoothies or even pancake batter for a calorie and protein boost. The carbohydrates in the gainer help refuel your muscles to help with muscle growth and recovery along with the protein while the amino acids in the formula provide additional nutrients to improve your health.

  • NSF certified – safe under banned substance regulations
  • Wide range of tasty flavors
  • Trusted brand used by pro athletes
  • Rapid and sustained release proteins used
  • Caused heartbeat irregularities in some
  • Raises sugar levels too high in some people

Click For Muscle Milk Price

What Is A Mass Gainer?

Mass gainers or weight gainers are supplements that are usually consumed in the form of a shake. They are jam-packed full of calories that are needed for the body to build muscle mass, strength and increase body weight.  They often also include macronutrients and micronutrients. Plus other muscle building ingredients such as creatine.

Weight Gainers – Reasons To Use Them

Most people turn to weight gainers because they have problems putting on weight through their eating habits, often because they are ectomorphs. They can be used to supplement calorie intake if you’re simply not eating enough during the day or to combat a physical problem that prevents natural weight gain. More so, a good mass gainer can double as a protein supplement as most have enough protein to replace additional supplements while also adding to your body weight and improving a strength training progress.

But remember… a weight gain supplement can never replace whole food and a good training routine.

man flexing biceps

They can also contain other nutrients like creatine, L-glutamine, and similar amino acids to help with muscle gain and recovery. The good thing about these additional nutrients is that they work in other ways besides helping you gain weight. They can boost your immune system and help stabilize your metabolism to keep you in optimal health.  So they are super useful if you are a skinny guy.

When to Take Mass Gainers

The reason you’re using a weight gainer supplement plays a part in when you should use one during your day. Some people take their mass gainer in the morning to fuel their day while others use it as a pre-workout supplement to help them get through their routine. Still, some wait to use their weight gaining supplement after their workout in order to feed their muscles to help them recover. Keep your own needs in mind and experiment to see what will work best for you and your routine.

Mass Gainers Side Effects

While weight gainers are considered safe when used according to their individual instructions, there are some possible side effects that you should consider before starting one. The most common complaints are:

  • Bloating and excess gas
  • Diarrhea or urgent bowel movements
  • Gastrointestinal cramping

Most users say that these side effects go away when your body acclimates to the product, however. To better gauge your body’s possible response to a mass gainer, it’s best to speak to your doctor before you start using one to see if you have any pre-existing conditions or issues that a weight gainer supplement might exacerbate.

Another thing to note with mass gainers is that over time, you will likely see an increase in body fat as you gain weight. This is a natural part of the process of gaining weight but it also because many supplement contain sugar or maltodextrin. These are high on the glycemic index which can cause spikes in blood sugar.

What to Consider When Selecting a Weight Gainer Supplement

With so many different products on the market, it can be hard to separate the good ones from the mediocre ones. By understanding what factors to consider when comparing supplements, you can look at your options and see which products make the cut and which are a waste of money.

Whey Protein

All mass gainers will contain some form of whey protein. The most bioavailable form is whey protein isolate and it will be absorbed most readily by the body. This is considered the gold standard, so if you can afford it, this is the best type to look for. Some other bioavailable source is whey protein concentrate and then whole eggs.

Carbohydrates and Macros

All mass gainer protein supplements should have a mix of carbohydrates as well as protein in order to provide you with the proper nutrients to fuel your body and help skinny guys gain weight properly. The best supplements should have a three to one ratio of carbs to proteins for the best protein synthesis.

Additionally, the proteins should be a mix of fast-release and slow or medium-release sources. With this, your energy levels can be sustained throughout the day as the fast-release sources will fuel you at the moment while the sustained-release proteins ensure that you’ll stay properly fueled throughout the rest of your day. Look for protein sources like micellar casein, whey proteins, and calcium caseinate.

protein shake

Choosing the right protein is important because it’s the nutrient that helps your muscles recover after strenuous workouts and what triggers new muscle growth. Whey is a fast-release protein that does this well while micellar casein and calcium caseinate are slow-release proteins. Those work great to help stop your muscles from breaking down and also preserving your lean muscle mass.

If you drink your weight gainer before bed or between meals, these slow-release proteins work best while whey-based formulas are great for post-workout shakes. For powders that use only fast-release proteins, make sure they have the proper amount of complex carbohydrates in the formula to sustain your energy levels throughout your day.

Digestive Enzymes

Mass gainer supplements can sometimes make you feel bloated and gassy. In order to stop this from happening, these products use digestive enzymes in their formula to help enhance your digestion. This helps your body process the supplement better, too, which helps it work quicker. If you’re using your supplement to help fuel your workouts, digestive enzymes can help your efforts by helping your digestive system and increasing its rate of absorption. Look for a weight gainer supplement with these enzymes to avoid uncomfortable bloat and embarrassing gas.

Low Sugar Content

A lot of subpar weight gainer supplements will use sugar to give you a jolt of energy instead of beneficial nutrients since it’s easier and cheaper to incorporate it into the formula. Sugar also increases the supplement’s calorie content easily, which might look good on the label. However, this isn’t great for your overall health since elevated sugar levels can lead to long-term health problems and increased body fat. Since you’ll likely be adding your supplement to a smoothie, milk or something other than water, it’ll mix with other sugars so you’ll be ingesting more than you should altogether.


If you have a predisposition to diabetes this can be harmful.

In general, steer clear of gainers that have more than 6 grams of sugar per 100-gram serving.

Instead of picking a mass gainer that uses high amounts of sugar look for one that uses clean sources of nutrients like carbohydrates and proteins while limiting the sugar content.

Additional Nutrients

Metabolic stress caused by exercise can only be properly combated by the right vitamins and minerals. When choosing a weight gainer supplement, try to find one that has a multiple vitamins incorporated into it. These supplements trigger biochemical reactions in your body to create energy and aid in muscle fatigue recovery after a strenuous workout.

Similarly, you should make sure that the supplement you choose has branch-chained amino acids as well as essential amino acids. These are important for all metabolic processes including the storage and transport of nutrients throughout your body. When present in your supplement, amino acids can help the nutrients in it throughout your body so it can work the way it’s supposed to. These are also the building blocks for proteins so it’s more likely that a mass gainer supplement will work properly if it’s noted that there are additional amino acids in it.

Considerations for Aspiring Bodybuilders

If you’re turning to a weight gainer supplement because you’re a skinnier person looking to become a bodybuilder or to at least get some serious gains, there are additional things that you should look for in your supplement. Find a supplement that has creatine, glutamine, betaine, and MCT (medium chain triglycerides) oil. While there are products that have these additional ingredients, not all of them do so you have to make sure you read the ingredients and product description if these factors are important to you.

muscular body

Creatine will assist your body in producing a phosphocreatine reserve. This is essentially an energy tank in your body that can be used during strenuous weight training sessions. With this type of reserve in your body, you can push yourself harder and get more out of your workouts so you increase your muscle mass effectively. While creatine, in general, is good, look for supplements that are made with Creapure, if possible. This is a pure, potent form of creatine that works best in your body.

Betaine is an amino acid that increases your muscle mass and supports alpha performance. A supplement with this amino acid is better than other basic supplements that just look to provide you with calories. Similarly, glutamine is another amino acid that aids in muscle recovery and prevents muscle breakdown to help you increase your gains and feel less fatigued after your workouts.

Finally, MCT oil and Omega 3 are a type of healthy fat that improves your body’s ability to burn unwanted fat while helping you build muscle mass. If you’re looking to gain muscle without too much fat, look for a supplement with MCT oil or Omega 3s fatty acids.

Mass Gainer Final Thoughts

When it comes to trying to find the best mass gainer for skinny guys, you should have a good understanding of what makes a good weight gainer supplement and what ingredients are needed to be effective.

While these are the best five weight gainer supplements for skinny guys (or gals!), there are more products available on the market that might better suit your needs and preferences. As you shop, be sure to compare all available products based on their descriptions as well as user reviews to narrow down your options.