Best Protein Powders For Weight Gain in 2024 – Our Sports Nutritionist Approved

We tried out many different protein powder formulas to discover the best ones for building muscle. We're confident that among these, you'll find one that suits your fitness goals.

Our editors independently research, test, and recommend the best products; we may receive commissions on purchases made from our chosen links. You can learn more about our review process here.


As far-fetched as it might seem, some people choose to gain weight, intentionally, for that matter. So why would someone want to gain weight? Obesity and being overweight is a health risk, and so is being underweight.

Besides wanting to gain weight for health and other personal reasons, for those in the world of workouts and fitness, the decision to put on more pounds is to build muscle, bulking up, and change up their look.

Each approaches the journey to gaining weight differently; some will opt to increase their calorie intake through the number of meals they consume or focus on foods rich in carbohydrates, and others will go for weight training or up their protein consumption.

Whichever route you choose, choosing the healthy and correct path that wouldn’t put you at any risk is essential.

Collen Chiariello, MS, RD, CDN, a registered dietitian, states,

Being underweight might result from underlying health issues. However, before embarking on a weight-gaining regime, it is important to consult a professional and get the necessary tests done beforehand.

In this article, we shall focus on the protein route but from the angle of protein powders. We shall analyze and unravel to understand what contributes to the best protein powders for weight gain.

Best Protein Powders For Weight Gain

Best Overall Protein Powder for Weight Gain:
CrazyNutrition’s MASS GAINER

Best Mass Gainer Protein Powder for Muscle Gain:
Transparent Labs Mass Gainer

Best Whey Protein Powder for Muscle Gain:
Naked Whey Double Chocolate Mass

Best Casein Protein Powder for Weight Gain:
Optimum Nutrition Gold Standard Casein Protein Powder

Best Natural Protein Powder for Weight Gain:
Legion Whey+ Protein Isolate

Our Top Picks

#1 CrazyNutrition’s Mass Gainer

Key features

  • Calories: 488 per serving
  • Protein: 40g per serving
  • Carbohydrates: 56g per serving
  • Serving Size: 4 Scoops (125g)
  • Servings Per Pouch: 20
  • Enzyme Complex: DigeZyme®
  • Suitability: Vegetarian-friendly

What we love:

  • Massive 40g Protein per Serving: Ideal for muscle gains
  • Clean 488 Caloric Blend: No sugar spikes or bloating
  • 56g Clean Carbs: Fuels workouts without the crash
  • DigeZyme® Enzyme Complex: Ensures smooth digestion
  • Free from Fillers: Only pure, performance-oriented ingredients
  • Versatile Usage: Perfect for shakes, meals, or on-the-go
  • Reputable Endorsements: Praised by fitness experts and publications

What to consider:

  • Premium Pricing: Reflects the high-quality formulation
  • Flavor Options: Currently available in Chocolate and Vanilla

Why we choose CrazyNutrition’s Mass Gainer:

Efficiency and purity guide our choice for this standout mass gainer. With an expertly crafted formula, Crazy Nutrition offers athletes a reliable way to pack on pure muscle, backed by positive testimonials and featured in respected fitness magazines.


CrazyNutrition’s MASS GAINER enters the market with a promise – lean muscle without compromises. With each precisely measured serving, athletes receive a powerful punch of protein supported by clean carbohydrates and fats, all optimized for the best nutritional uptake and muscle recovery.

DigeZyme® inclusion is a testament to the thoughtful formulation, ensuring users experience no post-consumption discomfort, which can be common with lesser products. From casual fitness enthusiasts to seasoned athletes, MASS GAINER caters to all, integrating seamlessly into diverse diet plans and workout regimens.

With transparent ingredient listings and vegetarian suitability, this best mass gainer doesn’t just elevate your workout results; it respects your health and dietary choices as well.

#2 Transparent Labs Mass Gainer

Key features

  • Servings: Enhanced serving suggestions with adjustable scoop size
  • Flavor: Chocolate Glaze Donut
  • Dietary Fiber: 4-6g per serving
  • Carbohydrates: 106-110g per serving
  • Sodium: 510-590mg per serving
  • Total Fat: 14g or less
  • Creatine: 3g per serving
  • Calories: 750 per serving
  • Protein: 53g per serving

What we love:

    • Sourced from 100% Grass-Fed Whey Concentrate
    • Impressive 53 grams of protein per serving
    • Robust caloric content of 750 calories for optimal gains
    • Includes 3 grams of Creatine for power and performance
    • No artificial sweeteners, coloring, gluten-free, and non-GMO
    • Sodium and fiber content balanced for health
    • Delicious Chocolate Glaze Donut flavor

What to consider:

  • Premium price point reflective of exceptional quality
  • High caloric content may require diet adjustment

Why we choose Transparent Labs Mass Gainer:

Compelling in both purity and potency, Transparent Labs MASS GAINER leads the charge in advanced muscle-building supplements. Its high-caliber whey protein, sourced exclusively from grass-fed cattle, ensures a top-tier amino acid profile for comprehensive muscle support.


In crafting Transparent Labs MASS GAINER, every detail contributes to the overarching mission of muscular development and weight gain without compromising on health. Athletes are armed with a mammoth 53 grams of protein, and with a substantial caloric input tailored to fuel growth.

The 3-gram Creatine boost in every serving marks the formula’s commitment to enhanced strength and power output. Remarkably, this all comes with the assurance of no artificial ingredients, a sincerity reflected in the transparent label and flavorful experience that is true to life and health-conscious by design.

#3 NAKED Whey Double Chocolate Weight Gainer

Key features

  • Certification: GMO-Free, Certified Gluten-Free
  • Serving Size: Flexible serving suggestions to accommodate individual needs
  • Flavor: Double Chocolate
  • Carbohydrates: 261g of Complex Carbs per serving
  • BCAAs 12.9g per serving
  • Calories 1,260 per serving
  • Protein 50g per serving

What we love:

  • Pure Ingredients: Highest-grade ingredients, including Naked Protein Blend
  • Rich Protein Content: Powerful 50g protein per serving
  • GMO and Gluten-Free: Clean nutrition, dietary needs
  • Whole Food Carbohydrates: Organic tapioca maltodextrin, no wheat-based carbs
  • Versatile Use: Perfect for shakes, smoothies, and healthy recipes
  • Supports Muscle Growth: Enhanced with BCAAs

What to consider:

  • Premium Pricing: Superior quality and ingredients
  • Caloric Density: Requires diet monitoring

Why we choose NAKED Whey Double Chocolate Weight Gainer:

With a steadfast commitment to quality and efficacy, Naked Mass – Double Chocolate exemplifies nutritional integrity for those serious about gaining mass. It stands out for combining high protein levels and clean complex carbs, delivering a performance-focused formulation without compromising on health or dietary preferences.


Naked Nutrition Mass – Double Chocolate emerges as a heavyweight contender in the mass gainer category, thanks to its robust combination of all-natural whey protein, organic complex carbohydrates, and BCAAs. Designed for optimal nutrition, this supplement champions purity and potency in one.

Absent are the artificial sweeteners and flavors typically found in mass gainers, replaced instead by organic cocoa for a tasteful, healthful indulgence. It’s not just a supplement; it’s a carefully calibrated tool for athletes and individuals seeking significant muscle gain while maintaining dietary integrity.

#4 Optimum Nutrition Gold Standard Casein Protein Powder

Key features:

  • Protein: 24g of Micellar Casein per serving
  • BCAAs: 5g per serving
  • Glutamine: 5g of naturally occurring Glutamine and Glutamic Acid
  • Flavor: Chocolate Peanut Butter
  • Serving Size: 53 servings (Pack of 1) available
  • Certification: Renowned for quality and purity
  • Casein: Sourced exclusively from premium micellar casein

What we love:

  • Satiety Enhancer: Supports feeling full longer
  • Slow-Digesting: Ideal for between meals or nocturnal nourishment
  • Rich in BCAAs: Provides 5g of natural Branched Chain Amino Acids per serving
  • Calcium-Rich: An excellent source for bone health
  • Innovative Flavor: Chocolate Peanut Butter for a delicious treat
  • Trusted Brand: 30 years of delivering quality supplements
  • Mixability: Consistently smooth shakes with every mix

What to consider:

  • Digestion Rate: Slower absorption, best for certain times
  • Texture: Thicker in consistency when mixed

Why we choose Optimum Nutrition Gold Standard Casein Protein Powder:

Optimum Nutrition Gold Standard Casein sets the benchmark for slow-digesting protein support, providing sustained amino acid delivery and muscle-rebuilding potential. Its meticulous formulation of premium micellar casein maximizes anti-catabolic effects, making it a muscle recovery powerhouse.


Approaching the apex of slow-digesting protein supplements, Optimum Nutrition’s Gold Standard uniquely leverages the muscle-preserving capabilities of micellar casein. This Chocolate Peanut Butter flavored option isn’t just about taste—it’s a deliberate choice for delayed protein release, aligning with the body’s needs during rest periods.

It compliments a round-the-clock nutrition strategy, working in synergy with other Optimum Nutrition products to tailor a comprehensive post-workout and recovery regimen. Every serving is a pact with quality, sported by a brand that has stood for excellence across three decades. Be it before bed, between meals, or for nocturnal nourishment—invest in a trusted formula that delivers safety and effectiveness.

#5 LEGION Whey+ Protein Powder

Key features:

  • Protein: 22g of Whey Protein Isolate per serving
  • Calorie Count: Approx. 100-120 calories per serving
  • Flavor: Chocolate Peanut Butter
  • Serving Size: 78 servings (Pack of 1)
  • Source: Grass-fed dairy from Ireland
  • Certifications: NSF and GMP facility manufacturing
  • Diet Compatibility: Lactose-free, sugar-free, and suitable for a keto diet

What we love:

  • Amino acids for muscle growth
  • Effective post-workout recovery
  • 22g protein, 100-120 calories
  • Grass-fed whey isolate from Ireland
  • Naturally sweetened and flavored
  • Made in the USA, product safety ensured

What to consider:

  • Taste varies: natural flavoring may be less sweet than artificial.
  • Premium ingredients often cost more than others.

Why we choose LEGION Whey+ Protein Powder:

LEGION Whey+ stands out as a superior protein source, integrating grass-fed whey protein isolate with a commitment to natural ingredients and manufacturing excellence. Its formulation is science-backed, promoting lean muscle build and swift recovery without the compromise of added fillers or artificial substances.


In a saturated market of sports supplements, LEGION Whey+ emerges as a paragon of purity and efficacy. Its protein-rich, low-calorie composition is meticulously aligned with the requirements of health-conscious athletes and fitness enthusiasts. Beyond just nutrition, the chocolate peanut butter flavor is crafted for a satisfying culinary experience that delights as much as it nourishes.

Mike Matthews’ ethos of simplicity and science converges in LEGION Whey+, creating more than just a supplement—it’s a cornerstone for peak physical performance and well-being. With each serving containing 22g of protein and only 100-120 calories, this protein powder is a powerhouse in the world of sports supplements.

Types of Protein Powder Available

So, which is the best protein powder for weight gain? Because protein can’t be just any that is available in the market, right? The protein powders available in the market differ in quality and where they are derived from.

Before you start researching and bookmarking protein shakes for weight gain, we shall look at the different types of protein powder below:

Whey Protein

It is one of the most popular forms of protein; it digests easily and fast and is also affordable compared to the others. It is a favorite with many as it also has research backing its benefits, including muscle recovery – a plus after those intense workouts.

A by-product of cheese is from the liquid whey produced during the manufacturing process, which is then dried to a protein powder form. It is an excellent option for enhancing the daily calorie intake as it will increase weight and muscle mass.


Like whey protein, casein is also from cow’s milk used during cheese manufacturing. Its digestive and absorption process is much slower than whey, a feature many bodybuilders prefer.

Due to its slow digestive process, it is ideally taken before bedtime to reap its full benefits.

Egg Protein

It falls under the animal-derived proteins category; egg protein comes at a higher price tag than other proteins in the same category. It is ideal for lactose-intolerant individuals and provides additional proteins for muscle growth and repair.

Pea Protein

It is a plant-based protein derived from peas but combined with rice. Pea protein is a great protein option for vegans or individuals predisposed to allergic reactions after consuming dairy and egg by-products.

Rice Protein

Rice protein cannot stand alone as the sole source of protein that can deliver essential amino acids, so it is usually combined with other forms of protein like the pea.

Once it is combined in its completed form, it can aid in muscle building.

Hemp Protein

It is another type of plant-based protein also formulated into weight gain powders. Unlike the rice protein, this is a stand-alone protein with essential nutrients that support muscle gain and overall health and well-being.

Now that you know the different variations that protein powders are categorized in, you will be able to go with one that aligns with your fitness goals and preferences, hence preventing unwanted results in the long run.

Best Protein Powder for Weight Gain: Factors to Consider

Before you go out there and purchase a protein powder for muscle gain and weight, there are some factors to consider. They are:

Third Party Testing

Third-party testing solidifies your trust in a protein powder as it shows unbiased certification of the product, confirming its purity and safety for your consumption. Some reputable organizations known for third-party testing are NSF International, USP, BSCG, Informed Choice, and Eurofins Scientific.

Protein Source and Amount

Knowing the source of protein is essential as you will choose a protein powder formulated from a high-quality source. You will select a product that is ideal for you and matches your preferences, so if you are vegan or lactose intolerant, your choice of protein powder will be based on the knowledge of its source.

Calorie Content

Weight gain goes hand in hand with the proper calorie intake. It would help if you talked with a dietitian or doctor to know the amount of calories you must take in a day. Boosting your daily calorie intake will help you attain your weight gain goals.

Scoops Per Serving

The volume of protein powder you take depends on individual capacity; some people can comfortably consume liters upon liters of weight gainer shakes in a day. Some powders are high in concentration, requiring far fewer scoops, while others require more.

Additional Ingredients

Before making that high-calorie protein shake, you need to be aware that some protein powders, not all, might contain synthetic and artificial ingredients, which can affect the quality of the product. While some of the additives might be harmful, others, like vitamins and minerals, will be helpful toward your weight gain goals.


Most weight gain supplements are sweetened naturally or artificially. It all boils down to what you want and what works for you; some people don’t mind artificial sweeteners like sucralose, while others prefer to stay away from them and go for stevia or regular sugar products.

The amount and content of sugar per scoop are also things to be monitored as you would want to avoid taking excess sugar that beats the purpose of working towards a lean and healthier body build.


As much as weight gain powders provide convenience as you can take them while you are on the move, sticking to products from recognized and reputable brands is essential. The brand standing of a protein powder is tied to its quality and user reviews.

Tips to Help With Your Weight Gain

In addition to taking the protein powder, working out, and consuming a high-calorie diet, you can include and make some lifestyle changes to help the weight gain process along. These tips are:

  • Get enough quality sleep
  • When taking your meals, start with the high-calorie foods first, like protein and fats, followed by vegetables and any other highly fibrous foods
  • Quit and avoid smoking as this leads to loss of weight
  • Drink water after meals and not before ensuring you consume enough calories on an empty stomach
  • Avoid smaller plates and opt for bigger plates
  • Have small additional meals and snacks spread out throughout your day

final-sec verdictConclusion

Whatever has driven you to want to gain weight, we strongly encourage you to do it correctly and safely. Another thing to note is that the results will take time, and what works and how it works for someone else might not be similar to your experience. The process requires patience, commitment, and consistency.

Mary Wirtz, a registered dietitian and expert in sports dietetics, states,

No individual is the same as another in matters concerning weight gain. Muscle and weight gain goals depend on factors like age, medical history, if someone is under certain medication, ability to work out, level of physical activity, and others.

To maximize the results of the best protein powder, you can combine it with weight training, cardio workouts, and, most importantly, a balanced diet as weight gain supplements or powders cannot and should not be used to replace meals.

Frequently Asked Questions (FAQs)

Q. Does protein powder make you gain weight?
A. Yes, it can. Protein powder should be used correctly alongside a high-calorie diet and weight training to help you gain muscle and weight. Opt for one with a high-calorie content in each serving to get the most out of the protein powder.

Q. What is the recommended daily quantity of protein you should consume?
A. There isn’t a standard recommended quantity of protein that you should take in a day; on its own, a protein powder does not affect the weight you gain. Its purpose is to boost your daily calorie intake. You can start by identifying the right amount of calories you should consume in a day and then top them up with the protein powder, ensuring you follow the guidelines provided on the product

Q. Is there a difference between mass gainer and protein powder?
A. Yes, there is. Mass gainer comprises high-calorie protein, carbohydrates, and fats, while protein powder comprises only protein.

Ayana Habtemariam, MSW, RDN, LDN

Ayana Habtemariam MSW, RD, LDN, is a nutrition therapist, certified intuitive eating counselor, and macro social worker based in Arlington, Virginia.

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