To help you find a good product, we’ve researched & compared the best weight gain supplements on the market right now.
ⓘ If you buy something after visiting a link below, we get a commission.
1. Optimum Nutrition Pro Gainer
Pro Gainer is loaded with 60g of protein, 85g of carbohydrates, and 24 vitamins and minerals. It is the perfect post-workout for those looking for mass, or as a simple weight gain powder to use between meals. This product provides everything your body needs to gain mass and none of the unnecessary junk.
- 60g high-quality protein per serving
- 85g carbohydrates
- 24 different vitamins and minerals
- 4g dietary fiber
- 650 calories
- Small serving size compared to many similar products
- Made by Optimum Nutrition, one of the best brands in the business
- Easy and convenient – does not require a blender (use a BlenderBottle for easier mixing)
- Available in 3 flavors
Who makes it: Pro Gainer is made by Optimum Nutrition, one of the biggest names in the sports nutrition industry. Since 1987, Optimum Nutrition, or ON for short, has been a leader in developing highly innovative, affordable, and effective products. In their 25+ years in the industry, ON has received many prestigious awards and has developed a reputation for producing some of the most high-quality product lines available.
2. Transparent Labs ProteinSeries MASS GAINER
Transparent Labs MASS GAINER uses only high-quality ingredients and provides full label transparency. It comes packed with 53 grams of 100% Grass-Fed New Zealand Whey Protein Concentrate (WPC80), 109 Grams of carbs sourced from organic tapioca maltodextrin, 6 Grams of Healthy Fats, and 3 grams Creatine Monohydrate. The use of premium ingredients does create the need for a price slightly higher than the market norm, but we’re confident that MASS GAINER may help you in your weight gain journey, for only a few dollars more.
- 750 Calories Per Serving
- 53 Grams 100% Grass-Fed New Zealand Whey Protein Concentrate
- 100 Grams Carbohydrates from Organic Tapioca Maltodextrin (100 g)
- Nearly 6 grams of MCTs
- 3 Grams Creatine Monohydrate
- 8 Grams of Fiber
- Naturally Sweetened with Stevia & Monk Fruit
- Full Ingredient Transparency
- Health Conscious Mass Gainer
Who Makes It: MASS GAINER is made by Transparent Labs, the fastest-growing new supplement company founded in 2015. Transparent Labs is known for their premium and effective workout supplements like PreSeries BULK, LEAN, STIM-FREE, BCAA Glutamine, and Creatine HMB – All of which provide full clinical doses and 100% label transparency.
3. MuscleTech MASS-TECH
MASS-TECH is a mass gainer supplement from MuscleTech, a leader in the sports fitness industry. It’s designed specifically for “hard gainers” who struggle to put on muscle mass. It’s loaded with protein, carbs, BCAAs, creatine, and more, and provides an easy way to get a ton of nutrition in a single shake. It’s manufactured by a trustworthy, award-winning company, and its cost-per-serving is very reasonable.
- 63g protein per serving
- 132g carbs
- 13g BCAAs
- 10g creatine
- 840 calories per serving
- Designed for hard gainers
- Added enzyme digestion complex
- Several flavors available
- Good reviews
- Huge container with 7lb of powder
Who Makes It: MuscleTech is a large and popular manufacturer of sports science supplements. They have a long track record (20+ years) of success in developing award-winning products. In fact, they are the #1 most award-winning sports nutrition brand in the US! They also have several #1 best-selling individual products. All their offerings are made in the USA, in a cGMP-certified facility. Overall, MuscleTech is a very trustworthy company when it comes to fitness supplements.
4. BSN True Mass 1200
BSN True Mass 1200 offers 50g of high-quality protein, 222g of carbohydrates, and as its name suggests over 1200 calories. It’s also one of the best-tasting mass gainers; if you read user reviews, you’ll see that most people like the taste of this supplement. True Mass makes a simple, tasty shake that helps you reach your fitness goals by providing all the necessary nutrients for lean muscle mass gains.
- 50g high-quality protein per serving
- 222g carbohydrates
- 23g Essential Amino Acids
- 12g BCAAs
- 16g dietary fiber
- 1220 calories
- Added vitamins and minerals
- Added glutamine
- Reasonably low sugar (16g per serving)
- Small serving size
- Easy to mix
- 3 flavors available
Who makes it: True Mass 1200 is made by BSN, one of the biggest and best companies in the supplement industry. For many years, BSN has been a pioneer of the industry, developing effective and innovative products for weightlifters and athletes alike. They have received many awards, and have millions of loyal customers.
5. Stacked Protein GAINER by Evlution Nutrition
Stacked Protein GAINER by Evlution Nutrition packs a massive 50g of high-quality protein into just one serving, providing your muscles with all the fuel that they need to maintain and build lean mass. 10g of glutamine and glutamine peptides helps to avoid fatigue and accelerate recovery, even after the toughest of sessions. At 880 calories per serving, Stacked Protein GAINER by Evlution Nutrition is the perfect complete body fuel at any time of day or night.
- 50g protein matrix per serving
- 10g glutamine and glutamine peptides per serving
- 10g BCAAs per serving to combat muscle catabolism and promote growth
- 22g EAAs per serving
- 880 calories per serving
- Ultra-filtered, superior-quality dairy and egg protein source
- Designed to promote muscle growth, increase strength and accelerate recovery
Who Makes It: Stacked Protein GAINER is made by Evlution Nutrition, a Florida-based company with a great reputation in the field of athletic nutritional supplements. Evlution Nutrition aims to bring you the most innovative, best quality, most effective supplements out there to help you to reach your fitness goals.
6. MusclePharm Combat XL Mass Gainer
Combat XL Mass Gainer Protein by MusclePharm is an outstanding complete body fuel. This mammoth gainer packs in 1270 dense calories into every serving, along with 50g of protein, 252g of carbohydrates, and additional essential fatty acids – everything your body needs to build strength and gain lean mass. Another feature of Combat XL that makes it a cut above the rest is the high levels of calcium, iron, sodium, and potassium that it provides – all essential minerals that can become depleted when following a high-intensity training program.
- 50g protein per serving
- Includes protein from 4 different sources
- 1270 calories per serving
- Contains essential fatty acids
- Rich in essential minerals
- Available in 3 delicious flavors
Who Makes It: Combat XL Mass Gainer Protein is made by MusclePharma, a nutritional supplement manufacturer based in California. MusclePharma has been in the business since 2010 and aims to bring the safest, most effective sports and nutritional products so that athletes of every level can benefit.
7. Universal Nutrition Real Gains
Real Gains, made by Universal Nutrition, is designed for active people looking to pack on the most mass possible. It has just about everything you need to build the body of your dreams – just add exercise, proper nutrition and dedication!
- 52g protein per serving
- 87g carbohydrates
- 610 calories
- Only 5g sugar
- 5g dietary fiber
- Includes healthy fats such as MCT’s, flaxseed oils, and more
- Very affordable
- Simple and effective
- Small serving size
- Mixes easily
Who makes it: Real Gains is made by Universal Nutrition, a company which has become a household name in the fitness community. For many years, Universal Nutrition has helped set the standard for quality in an ever-changing industry. Today, they manufacture a large line of highly effective supplements to suit the needs of a wide range of customers.
8. Dymatize Super Mass Gainer
Super Mass Gainer is a weight gainer supplement made by Dymatize Nutrition that combines high-quality protein with added amino acids, creatine, carbohydrates, glutamine, and more. Its complex carbohydrate blend can help give you sustained energy for your day and its high-calorie content can help you gain weight.
- 52g protein per serving
- 252g carbohydrates
- 19g sugar
- 2g amino acid blend (glutamine, glutamine peptides, l-leucine, l-isoleucine, l-valine, and zytrix)
- 1280 calories
- Available in vanilla and chocolate
Who makes it: Super Mass Gainer is made by Dymatize Nutrition, a large-scale producer of fitness supplements. Since 1994, Dymatize has strived to develop cutting-edge products that help its customers reach – and exceed – their fitness goals.
9. Mass JYM
Mass JYM is a unique mass gainer that has excellent reviews. It provides a balanced dietary profile, with fewer carbohydrates than average, and more fat. One big benefit of this product is that it does not use proprietary blends, so you can see each specific ingredient that’s included and the specific amount of that ingredient. It also uses a great mix of each macronutrient, offering 3 types of protein, 2 types of carbs, and a broad selection of beneficial fats. Instead of loading you up on cheap carbohydrates (sugars), it uses fewer carbs and more protein and fat. This results in a lower calorie count, but a potentially superior nutrient profile. The company claims that using a 1:1 ratio of protein and carbs is ideal for healthy muscle mass gains.
- 30g protein per serving
- 30g carbs
- 5g fiber
- 4g fat
- 270 calories per serving
- Blend of protein – whey, casein, milk, and egg proteins
- A mix of healthy fats
- Quality carbohydrates at a 1:1 ratio of carbs to protein
- Excellent customer reviews
Who Makes It: This product is made by JYM Supplement Science, which was founded by Jim Stoppani. JYM Supplement Science won Bodybuilding.com’s Brand of the Year award in 2018 and has received a number of other prestigious awards in the supplement industry. They have gained the trust of their customers by always disclosing the full ingredient profile and amounts, rather than using proprietary blends.
10. Optimum Nutrition Serious Mass
Serious Mass is made by Optimum Nutrition and provides a huge dose of calories, protein, carbohydrates, and more to help you reach your weight gain goals. It’s a good choice, although the large serving size and the higher-than-usual price are a downside.
- 50g protein per serving
- 1,250 calories
- 252g carbohydrates
- Creatine and glutamine added
- Added vitamins and minerals
- Easy way to consume a ton of calories, protein, and more
- Helps gain weight
- Available in 4 tasty flavors
Who makes it: Serious Mass is made by Optimum Nutrition, one of the most popular supplement companies out there. Best known for their Gold Standard line of products, Optimum Nutrition has been an industry leader since they formed in 1987. Today, you can’t go far in a gym or supplement store without seeing an ON product, and the company has received many awards and much recognition for its high-quality products.
Bonus: Vitol Russian Bear 5000 (Extremely high-calorie weight gainer)
Vitol Russian Bear 5000 is a HUGE weight gain supplement. Its huge serving size is a downside for some people, but for those looking for the most calories and protein possible, this is the best high-calorie weight gainer for you. That being said, the huge serving size is a little over the top. Many people use this product and take a ½ serving or even a ¼ serving, which is probably the best way to use it unless you’re on a very aggressive bulking cycle.
- 184g protein per serving – yeah, you read that right
- 2600 calories per serving
- 391g carbohydrates per serving
- 46g medium chain triglycerides
- Huge amount of protein and calories in one product
- Added anabolic compounds like Yohimbe, boron, and more
- Added vitamins and minerals
Who makes it: Russian Bear 5000 is made by Vitol, a manufacturer of natural supplements and bodybuilding products. In business for more than 37 years, Vitol has come out with a lot of good products and has many loyal fans.
Mass Gainer Buying Guide
Thanks to their nutritional density and often pleasant taste, they’re a godsend for those who have small appetites and fast metabolisms (sometimes referred to as “hard gainers”). They’re convenient and help to save you time and headaches, particularly if you lead a very busy lifestyle.
However, there’s a catch!
Many of the mass gainers on the market today are full of low-quality fillers, additives, and cheap carbohydrates just so that they can fill the container as well as line their pockets. But no worries, we’re here to help you rummage through the B.S. and get to the good, high-quality stuff.
We’ll tell you what to look for in a mass gainer supplement so that next time you’re in the market for one, you’ll know just what to look for.
Qualities of a Good Mass Gainer
Does the mass gainer you’re considering contain high-quality ingredients that will help you pack on clean weight primarily composed of muscle? Or is it filled with cheap crap that’s marked up extremely high?
Also, how does the price of the mass gainer supplement compare to others on the market? If it lies in the extremely low range, it’s most likely composed of low-quality, cheap filler ingredients, additives, and preservatives.
If it’s very expensive, it better have high-quality ingredients you’ll find here in this guide, or else it’s definitely not worth your money.
Servings Per Container
Servings in mass gainer supplements are often very big. What I mean by that is the scoop size itself is very large in order to accommodate all of the macronutrients and calories that are in the supplement.
So usually mass gainers will come in very large bags or plastic tubs. Even though this is the case, it’s still important to look at the supplement facts label to see what the serving size is exactly (in grams) and how many calories and macronutrients are contained within each serving.
I bring this up because sometimes companies will state that the product has an enormous amount of calories in a statement on the front of the packaging, but if you look in tiny little letters next to an asterisk, it states that it contains that many calories in two scoops, which just happens to be 2 servings, not one.
This is of course just an example, but it’s, unfortunately, more common than one might think. Therefore, it’s imperative that you be on the lookout for marketing tactics such as this that try to mislead you.
Also, a serving of a mass gainer is often multiple scoops-worth, not just one. So make sure to properly read the nutritional label before taking the mass gainer.
Have your friends heard of the product? Have you looked it up online? Oftentimes, looking at product reviews that aren’t on the manufacturer’s own website (i.e. Amazon, Bodybuilding.com) will give you a pretty good idea of the quality of the product.
Have you heard of other supplements from this brand before? Maybe you’ve tried them yourself with a different product of theirs? Give them a look up on TrustPilot or Better Business Bureau to ensure that the company you plan on doing business with deserves your money and hasn’t been doing anything sketchy.
Things to Consider when Buying a Mass Gainer
What is the total macronutrient profile of the mass gainer you’re looking to purchase? Although there are no hard and fast numbers to abide by and look for, we’ll provide you with some general guidelines so that you can sniff out the good stuff from the bad.
You want to make sure that the mass gainer has a sufficient amount of protein compared to the carbohydrate content it has. While carbohydrates can certainly help to build muscle, they are the cheapest of ingredients (whether low or high-quality) compared to proteins and fats (particularly if they are of high quality).
Because of this, sometimes companies will skew the ratio of carbs to fats way too much in the favor of carbs since it is much cheaper to do so.
When looking for an optimal macronutrient ratio of a mass gainer, there are a few figures that you should consider, depending on how much weight you’re looking to gain from taking this supplement.
|Weight Gain Goal||Carbohydrate:Protein Ratio|
|1 lb/week||between 2.5:1 to 3.5:1|
|1.5 lbs/week||between 3:1-4.5:1|
You’ll see mass gainers that vary widely in calories. Some will be as low as 600 calories per serving while others will be over 2000 calories per serving. It’s really up to the manufacturer to decide how many calories go into a serving of their mass gainer supplement.
Just make sure not to let the mass gainer comprise the bulk (no pun intended) of your diet. Remember, this is a supplement, not a crutch. Make sure your diet consists primarily of whole foods that are minimally processed and then use the mass gainer supplement when you need it most, such as when you’re on a time crunch.
As we’ve stated earlier in this guide, you have to make sure that in order to get the most value for your money, that the mass gainer supplement you decide to purchase has high-quality sources of protein, carbohydrates, and fats.
While the following list isn’t meant to be exhaustive, it’ll give you a good reference to look back to if you ever get stuck when you’re looking at the nutritional label of a mass gainer supplement.
|High-Quality Protein Sources||High-Quality Carbohydrate Sources||High-Quality Fat Sources|
|whey isolate and/or hydrolysate||oats||medium chain triglycerides|
|egg/albumin||sweet potato||any type of nut butter|
|hemp||any fruit-based source||coconut oil|
You want to avoid mass gainers that have “maltodextrin” as one of the first ingredients on the ingredients list. This is because maltodextrin is a simple sugar that companies often use as a filler to make up a significantly large portion of the carbohydrate content.
You want a majority of the carbohydrate sources to be from whole food sources so that you have a nice, gradual, steady energy throughout the day, rather than getting a “sugar high” essentially and coming way up and then crashing down rapidly. Not a good time, trust us. Plus, it won’t do you any good for your performance or body composition either.
Protein Type & Quality
You want to make sure that the type of protein being included is high-quality protein; as this is arguably the most important component of the mass gainer. You want to avoid mass gainers that are primarily composed of cheap proteins like soy and whey concentrate. Other than that, as long as you stick to the types of proteins listed in our Ingredient Quality section above, you’ll be good to go in the protein department.
Other Active Ingredients
Some other ingredients that mass gainers will often have in them are digestive enzymes. These enzymes, such as protease (digests protein), amylase (digests carbs), and lipase (digests fats) are already present in our gastrointestinal tracts.
But when we’re eating a large amount of food with the goal of gaining muscle in mind, our digestive systems can take a huge hit. Because of this, the added digestive enzymes have the potential to aid in digestive processes, particularly in those with digestive issues .
Along with creatine, many companies will also provide particular amino acids, such as L-Glutamine, which increases the effects of skeletal muscle protein synthesis, potentially improving your gains and recovery .
Along with this, branched-chain amino acids (BCAA’s) may also be added to improve gains in strength and lean muscle mass . If your mass gainer or protein powder doesn’t provide BCAAs and you’d like some, you can add a high-rated bcaa supplement to your routine.
As a way to “round out” the supplement and make it a true “meal replacement”, many companies will provide a comprehensive array of vitamins and minerals (which we all know of course are good for us ), just like you would see in many high-quality, whole-food meals.
Artificial ingredients and additives
If you are prone to digestive upset when consuming high amounts of calories or supplements in general, then you’ll want to avoid artificial ingredients and additives such as:
- acesulfame potassium (sometimes referred to as “Ace K”)
- gums such as xanthan gum, guar gum, and carrageenan
- high fructose corn syrup
- hydrogenated oils
Even if you don’t have any specific food sensitivities, eating a high-protein diet with the goal of gaining muscle takes a toll on your digestive system after a while. So you don’t want to make it worse by bombarding it with a myriad of synthetic ingredients that your body will have more trouble processing compared to more nutritionally wholesome sources.
Thickness & Mixability
A mass gainer will definitely be thicker than a standard protein shake just due to the sheer volume of the supplement. Although this is a given, the mass gainer should still be mixable with a standard shaker bottle and blender ball, as many people use this as a convenient, portable food option.
But if you prefer to use a blender instead, then that’s perfectly fine and you don’t really need to worry about mixability too much. But if it won’t even mix well in a blender, then you really have a low-quality product on your hands!
The best way to tell a product’s thickness and mixability is to check out user ratings and reviews, which are often found on the websites they can be purchased from. Some more helpful info on this can be found in our Brand Reputation and User Feedback sections at the start of this guide.
Taste and Flavor Options
There are many mass gainers out there. There are also a lot of different palates and tastes out there. The good thing is that there are many flavors to choose from, such as:
- Chocolate Peanut Butter
- Peanut Butter
- Cinnamon Toast Cereal
- Cookies n’ Creme
Need I say more?
Of course, each company will have different flavors (some more than others) and they’ll all taste different, even if they’re the same flavor but just happen to be from two different companies. While the best way to tell is to try it for yourself, you can also use our tips from our Brand Reputation and User Feedback sections of this guide to help you make the best decision for your taste buds!
Mass Gainer Ingredient Breakdown
Now, this is perhaps the most common ingredient that you’ll find in a mass gainer. Although whey protein is a great way to pack on muscle mass, there are different types that you should be aware of .
The three main types are concentrate, isolate, and hydrolysate. The latter two are of the highest quality; going through a more tedious filtering process, thus having virtually no lactose or fats.
Concentrate is the less superior of the two, making it cheaper than isolate or hydrolysate. Having less lactose in your mass gainer supplement will help you to absorb more of it, as lactose often causes digestive issues in people when taken in high amounts .
Milk Protein Isolate/Casein Protein
These proteins are very similar, so we’re lumping them into one category here. These proteins are slower-digesting compared to whey protein, which is often what makes mass gainer supplements have such a thick consistency. It’s a great addition to whey protein in order to balance out the faster-digesting nature of the whey protein.
Vegan Proteins (Brown Rice, Pea, Hemp)
Vegan protein powders have been gaining popularity very quickly and for good reason. The best types of vegan protein powders provide you with a solid dose of protein using only plant sources which can help you avoid digestive problems (and moral ones) that come with dairy products.
These types of vegan proteins are the highest quality proteins you’ll find in mass gainer supplements. They’re the closest you’ll get to their animal protein counterparts if you’re a vegan, and you really can’t go wrong.
This is another common ingredient found in mass gainer supplements. This is a fast-digesting sugar and is often added to provide flavor, as well as a quick boost in energy and a non-filling source of easy calories. The inclusion of this ingredient only becomes an issue when it’s one of the very first ingredients on the list. This means that it’s very prominent in the supplement and that it’s used in an amount that’s much greater than necessary. Some is fine, but too much is just a way to waste your hard-earned money.
Low Glycemic Index (GI) Carbohydrates
Carbohydrates that rank low on the glycemic index (GI), which means that they don’t cause a rapid spike in blood sugar, are increasingly being used in mass gainer supplements. These include foods like oats, brown rice, sweet potato, bran, and buckwheat. This is because they provide a more stable release of energy from the calories that they provide, as opposed to high GI carbs like fast-digesting sugars, that’ll leave you essentially crashing and burning in just a short amount of time.
Nuts and Seeds
Nuts and seeds are a great source of heart-healthy fats . Not only that, but along with the low GI carbs, provide a stable source of energy throughout the day. Fats are also very dense in calories (9 calories per gram as opposed to only 4 calories per gram for proteins and carbs), so it’ll help you to reach your calorie goals faster and easier. So look for flax, hemp, chia, peanuts, almonds, or cashews (just to name a few) the next time you’re in the market for a mass gainer supplement.
How to Get the Most out of Mass Gainer Usage
In order to get the most out of your mass gainer supplement, you must use it properly. This means that you shouldn’t take it when it’s not necessary.
What I mean by this is that it’s best to take it when you actually need it, like when you’re crunched for time and don’t have the means to make a substantial meal or you’re at work and you don’t have time to take that lunch break. But if you’re just sitting at home and you have the food necessary to make a high-quality meal for yourself but you just drink a mass gainer shake instead, that’s honestly just being lazy. And also, you’re just throwing your money down the drain, because although these supplements can help save you significant amounts of time, running through them faster than necessary will drain your wallet fast.
Now the proper way to go about consuming them is up to the individual, as everybody has different preferences as to how they like their shakes. Some people like to use a blender, some people like to use a shaker bottle. Some people prefer using milk, others prefer using water. It really doesn’t matter at the end of the day. Whatever’s most convenient and preferable for you, then that’s the option you go with.
As for timing, this also doesn’t matter too much either. But if we had to choose one “special” time to take this supplement, it would be post-workout, as the flood of protein, carbs, and amino acids would really help expedite the recovery process.
Mass Gainer FAQ
These are some of the most commonly asked questions about mass gainers.
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Contents of this Article
- 1. Optimum Nutrition Pro Gainer
- 2. Transparent Labs ProteinSeries MASS GAINER
- 3. MuscleTech MASS-TECH
- 4. BSN True Mass 1200
- 5. Stacked Protein GAINER by Evlution Nutrition
- 6. MusclePharm Combat XL Mass Gainer
- 7. Universal Nutrition Real Gains
- 8. Dymatize Super Mass Gainer
- 9. Mass JYM
- 10. Optimum Nutrition Serious Mass
- Bonus: Vitol Russian Bear 5000 (Extremely high-calorie weight gainer)
- Mass Gainer Buying Guide
- Mass Gainer FAQ
- What are mass gainers?
- How do mass gainers work?
- What are the benefits of mass gainers?
- Who should take a mass gainer?
- Why should I take a mass gainer?
- Can mass gainers replace meals?
- Do mass gainers actually work?
- Are mass gainers a waste of money?
- Can I make my own mass gainer?
- Is it good to take a mass gainer every day?
- What are the realistic expectations of a mass gainer?
- Are mass gainers banned in sports?
- Should I take mass gainers if I don’t work out?
- Should I take mass gainers if I don’t diet properly?
- What can make mass gainers less effective?
- Should I take a mass gainer with milk or water?
- When is the best time to take a mass gainer?
- Should I take mass gainers on days I don’t work out?
- Is it okay to take mass gainers before bed?
- How long does it take for mass gainers to work?
- For how long should I take a mass gainer?
- Should I take a break from mass gainers?
- Can you take too much of a mass gainer?
- Are mass gainers safe to take?
- Are there any side effects of mass gainers?
- Do mass gainers cause damage to the kidneys and liver or any other organ?
- Why are mass gainer dosages so big?
- Can I take a mass gainer with other supplements?
- Should I take mass gainers if my other supplements have the same ingredients?
- What is the difference between a mass gainer and a protein powder?
- Should I take a mass gainer if it has creatine?
- Are mass gainers vegan?
- Do mass gainers boost the immune system?
- Do mass gainers increase testosterone?
- Do mass gainers help you gain muscle?
- Do mass gainers give you more endurance?
- Do mass gainers give you energy?
- Do mass gainers help burn fat?
- Can mass gainers make you stronger?
- Why do mass gainers make me nauseous?
- Why do mass gainers upset my stomach?
- Will a mass gainer make me fat?
- Can/Should women take mass gainers?